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Illya's Lewd Theft!

Summary:

Illya comes up with a very, very lewd plan to make sure her beloved older brother will have some fun with her~!

 

Co-written with Iceduke. 

Chapter 1: Illya's Lewd Plan!

Chapter Text

 

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Shirou couldn’t believe it. Just when he thought his morning would happen without anything bothering him at all, there she was… it was far from the first time she had been acting in such a provocative manner, and no matter how much he protested and tried to call her out for the perverse hijinks at play, all of his words fell upon deaf ears. But then again, when it came to who he was dealing with, it was practically like talking to a wall! 

Illya, his older sister, was once again trying to have him give in to some lewd fun, and yet he wasn’t quite feeling like he would do such a thing. No matter how many times she tried to give his dick some fapping, how raunchy her words were with him, there was nothing he could do to keep her away from his thingy! She was trying to claim it all for herself, practically acting as if some of the other girls in the household were coming against him and trying to do something sexually charged with him. 

“C’mon now, this is the… what? The seventh time you’ve done this in the week!” The young man groaned as he was seeing the moon-haired girl practically on top of him. She always did it when she tried to get a reaction out of him, and it almost worked, it was all thanks to his iron-level will that he never even thought about doing something lewd with his sister, but he knew there would be a day when she did something so outrageous that even Taiga would be left speechless from the perversion that would be on display, and that was saying something when that hottie herself was also down for some intense teasing. 

Illya the little tease just pouted at him as she dragged a finger down his well-defined chest, “Come on Onii-chan! Just indulge your sister a bit please~.” 

Shirou gritted his teeth as her teasing tone sounded like silk and honey in his ears, but he still held back, “For the last time Illya, no . Now, did you have something for me to do?” 

Her pout intensified as she stopped her teasing. She turned away with a huff, “Humph! No fun! But I did need some help with something at the castle. The car’s ready so hurry up and get ready!”    

The third-rate Magus let out a sigh of relief that something normal would finally happen between them. The past week has been… hard on him in many ways. So simply helping out would put him at ease. 

Little did he know about the devious smirk on his sister’s face… 



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The whole trip to Einzbern Castle had been full of tension as it was. Not even being in a semi-public place like a car was enough to stop Illya from doing some raunchy antics, and it was made worse by the fact it was being driven by Sella and Leysritt, and thus that meant the short-stack was practically capable of doing anything she wanted without having someone to call her out for it, aside him of course. 

“D-Damn it, what are you…?” Shirou grunted, and that’s when he saw the girl sitting on his lap, precisely putting enough pressure on his crotch. It was already a huge, HUGE task to handle any sexual tension from growing, but whenever his sister did something this lewd and perverted, it was practically a miracle he didn’t cum here and there already. Sure, her backside wasn’t as comparable as the one Rider or Rin had going for, but Heavens wasn't acting as if she was some damn harlot! 

“What’s the matter, Onii-chan ~? Is there something bothering you~?” She asked, and his shaft was beginning to get harder the more pressure she gave him. Fuck, she was even worse than Rin, at the very least that phat-assed girl knew where and when to get her stuff going, but Illya? There was practically nothing he could do to stop her, and in fact it wasn’t even a good idea to call her out next to her maids. They were almost as good as a Servant when it came to kicking ass, and the last thing he wanted was for them to give him a strong kick in the nuts… 

“I know you’re a pervert too, Onii-chan ~! Don’t act like you haven’t been FUCKING with Tohsaka or Saber, I have eyes everywhere!” The German girl teased, and the young man gulped. The fact she knew what he’d been up to when he was supposed to be training was bothering him to no end, and he wasn’t even sure how she could find out about such things. But then again, she was capable of getting quite a few tricks up her sleeve, and he could only tell those two busty maids had something to do with it, especially given the teasing smirk they were giving from their side of the vehicle. 

Shirou inhaled sharply as the little minx that was his older sister wiggled her tiny hips. Even through his jeans, he could feel the soft plushness of her small, yet supple ass. He let out a shuddering breath as she smirked playfully at him. Her wine-red eyes glittered with amusement and he felt his breath be stolen yet again. 

Illya, his sister, was beautiful despite her small size. He tried to find the words to respond to her accusation… but he was lost in her eyes and the feel of her ass grinding on his crotch. Her warm teasing smile drew him deeper into the bubbling lust for her he stuffed away.    

Her small delicate hand framed his face, “Nee~ Onii-chan~ why don’t you indulge me just this once? Just a little kiss and I promise I won’t tease you as much today. Simple no~?” 

Shirou licked his suddenly dry lips as his eyes zeroed in on her shiny plump lips. His heart pounded in his chest as blood rushed toward his crotch as his libido sparked to life. He stomped it down as best he could but it still influenced his words, “Just once, okay? Then I can do what work you need me to do at the castle!”     

Illya gave him a cheeky smile, “Hehe, you are the best Onii-chan!” She then turned around to fully straddle him. Her hands wrapped around his neck as she drew closer. Her lips were but mere inches away from his own. He inhaled her sweet scent deeply and relaxed just for a moment.   

The second he did, she took his lips. 

Soft , oh so soft were her lips and equally as sweet. His hands tightly gripped his seat as he so desperately wanted to roam her small lithe body. Illya had no such problems. He could feel her delicate hands ghost over his body. Small feather light touches that sent sparks of pleasure through his body.    

She broke the kiss for a moment, “Hehe, your body is sooo~ sturdy Onii-chan~ .” 

There was a glint in her eyes. One that he attributed to her appreciation of his body… but there was something else he couldn’t quite gleam. Any further thoughts on the matter were drowned out as she took his lips once more. For the remaining duration of the ride, they kissed as his sister ground her plush ass on his full-blow erection. The strength of his steel-hard dick was enough to make her rise several inches! 

They weren’t at the castle, and yet the Einzbern girl was already seeing what her brother could do~. 



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Once they arrived at Einzbern Castle, things kept on getting even more intense! Shirou and Illya kept on giving each other some intense kissing, and if anything that cock was having a stronger desire to do obscene things with the girl. Now, it wasn’t quite the same when someone like Rider or Tohsaka teased him, but the fact was the moon-light haired cutie was doing some obscene things with him, and it wouldn’t take long for them to actually FUCK with such passion as well. It would only take on a miracle for that ever-growing libido to actually stop now. 

Even their way inside the castle was full of debauchery, Shirou kept on doing some teasing as his hands were moving all the way around the German girl’s soft, smackable booty. It wasn’t easy to compare it to the round, PHAT magnitude of Medusa’s backside and even Sakura, it was still enough of a booty that he was finding himself giving it some humping here and there. It had become quite a surprising thing for himself to do, but there he was, some of that strong will of his tearing itself apart all thanks to the wild teasing of his older sister!

“S-Shirou, you’re so good at this…~.” Illya moaned out, and she was rewarded with some long, slimy lick all over her soft neck. There were quite many things she’d expected from her brother to do, and it was amusing how he was just right there giving in to some of the wildest needs a young man like him needed to indulge with. And she had even more ideas in mind for him, but those were full-on spoilers! Oh, once they got right to the room she wanted to, her Onii-chan was going to see some wild, wild lewdness~.  

Shirou’s dick was getting a stronger itch to do something with Illya, it was getting bothering thanks to the pressure against his jeans! It was only his underwear that stopped the whole sensation from hurting him, but still, it was making him see things he’d never thought about, only when he got down to fuck with Saber and Tohsaka had his shaft felt such a strong urge to unleash wave upon waves of sperm all over their fuckable bodies! And he was getting right there with Illya, he FELT SUCH AN URGE to cum on her fine, smackable piece of ass… 

“J-Just a bit further t-this next door Onii-chan~ ! Moaned his adorably sexy little sister as his hands kneaded her ass. He reached the door in mere moments as he had just about the last of his reason leave him. Shirou pushed her against the door and he felt his lower body flex as his tenting jeans ground against the now-sodden underwear of his sister. His tongue greedily swirled within her small mouth as he humped against her tiny form. Her wine-red eyes were alight with delight and the way her delicate features were flushed red from arousal only intensified his own.     

He wanted to TAKE her now. His breath came out in near beastly snorts as he forced the door open to reveal a fairly normal room, but more importantly, it had a bed. He threw her on the bed and she landed with a soft *Pomf* 

“What are we going to do on the bed, Onii-chan~.” Illya, his tiny yet sinfully sexy little sister asked him with an innocent face he knew was fake… but it stirred his lust even more nonetheless. 

Just as he was about to pounce on her, his body locked up. More specifically his clothes kept him in place. His reason returned to him in that brief moment, “Illya, what are you doing…?” 

Her eyes narrowed in a look of haughty dominance as she sat up. With a flick of her fingers, his body marched towards the bed, “Before we begin Onii-chan I wanted to show you something, something special . So be a good boy and lay there while I prepare~.” 

She snapped her fingers and he was suddenly nude on the bed tied in the former remnants of his clothes. His titanic dick and massive churning testicles throbbed intently as the cool air stimulated them.    

Illya licked her lips at the sight of his massive tool, “Oho~! It’s even bigger in person! You are truly blessed Onii-chan~!! ”     

She straddled him and he could feel the small valley of her panty-clad ass do its best to wrap around his girthy dick. Her hand then rested on his chest and his body suddenly felt hot. A magic circle appeared underneath them. 

“W-What are you doing?! Let me go!” Shirou demanded. He’d been a fool for even getting to play along with his older sister’s perverse play, and there he was, about to get involved in some obscene hijinks. It was shaping up to be worse than that one time Medea tried to get his cum all for herself in the cinema, but the fact that it was his sister the one getting around with these antics was bothering him to no end. 

It was obvious she was planning something insane, and he could only see the magic circle below the two of them glow as the seconds went by. No matter how much he tried to summon his own magical energy to get the upper hand and make a run for it, nothing was working. It seemed Illya had gotten such a strong power level that would make the likes of Rin jealous, and he could only see the girl getting to turn around, and she pressed her booty on his naked, hard cock once more. 

“Oh my Onii-chan , you’re about to get a blessing here! Just lemme show you my booty can be even better than the one those chesty cows got on them!” The Teutonic girl laughed, as she was surely going to make a mockery out of Tohsaka and even Medea. Once they saw her giving some wild fucking with her brother, they were going to be so, soooooo jealous of her own might and skills! Yes! They were going to be licking her boots just for a chance to fuck with cute, adorable Shirou~. 

“Let me go, damn it! I don’t wanna… become some damn experiment!” Shirou groaned out, but the more he saw that booty shaking. But he must be going insane from the over-stimulation he was receiving, as he could swear the girl’s booty was getting BIGGER as the light on them kept on getting stronger. Maybe it was his own libido playing some tricks on him, but the fact was, that booty was getting wobblier, fatter, enough that he could even tell the size of both cheeks through her dress! 

He panted as she began to bounce that ass that had to be growing. He could see her panties strain to contain the massive growing globes of PHAT loli ass. With each passing moment, he felt weaker and weaker… yet the pleasure grew as those warm wobbly cheeks began to engulf his needy shaft. Minute after minute passed as his eyes couldn't leave the sight of those doughy cheeks growing. It was mesmerizing that Illya's hips widened and her clothes strained to hold the mass of loli assflesh back. 

After several long minutes, he blinked as his restraints felt looser around his… his tiny body! His eyes then widened in horror as his body kept getting smaller and smaller as time passed. 

Illya giggled as she looked down at him, “Hehe, like it Onii-chan? I’m stealing all those hard-earned muscles of yours to give me the biggest , wobbly, dump truck of an ass you have ever seen!” She then waggled her now widened hips as her clothes finally gave up. With a loud *Rriiiip!* her now massive ass exploded out of her clothes!   

Shirou’s mind was then drowned in lust at the sight of that…. that perfect ass. While Illya had drained his muscles and height to make him look like a child, she had not drained his dick. One that he often had trouble managing with his large physique. Now in the body of a child, the massive dick and heavy churning balls absolutely flooded his small body with potent sex hormones. Any reason he had left completely evaporated. 

Shirou bucked his hips into the crevice of Illya’s PHAT ASS. The pressure such a thick loli donk had around his dick felt heavenly. His massive shota cock surged as it shot out ropes of precum.  

Illya giggled in joy as the thick pre-rained down on her, “Hehe~! I see you are in the mood again, Onii-chan~! Now why don’t I show off a bit? You are free to enjoy the show~ .” 

Shirou had NO IDEA what his sister was planning, and if anything, he didn’t know if he should make a run for it or just indulge in whatever lewd fantasies she wanted to do on him. He was feeling powerless to stop her. All his might had practically gone down to her booty. The mere fact she had enough magical skills and power to do such a thing did impress him, but it was quite a shame she was using all of it on lewdness. 

But then again, the Holy Grail War system itself was practically done for good, unless someone dumb and senseless enough tried to have another go at it. None of his business anymore, but he knew a few of the girls still wanted to kick some serious ass! “F-Fuck, alright, do what you gotta do…” The boi said, groaning as he felt his dick getting to leak another few ropes of precum all over that massive piece of booty. It was much, MUCH BIGGER than Tohsaka’s badonk for sure, and if anything, he wanted to do something about it! Smack it! Fuck it! 

Oh dear, him having such lewd thoughts, and this time, he wasn’t feeling ashamed of them at all. He wanted to do something obscene with that booty, fuck THAT MASSIVE BOOTY until Illya was left as nothing but a moaning mess, begging him to have mercy! The boi grunted, seeing how the girl was now getting to sway those cheeks around, making each fuck-meat wobble around as if they were some damn heavy tiddies! “D-Damn it…” He grunted as his cock was getting harder, harder, seeing that fine piece of booty getting to move around as if it was made out of jello. 

“Heh! You’re getting hornier, aren’t you~? I won’t stop you if you wanna give yourself some fapping~.” The phat-assed girl giggled seductively, and hearing that was enough to motivate Shirou to actually go for it. Now, he’d fapped plenty of times before to quite a few JAV videos, and the sheer asses Medea, Medusa, and Rin got hanging around, but his own sister? it had been out of the question for a good while, but recently, he’d felt such an urge that became a lewd reality not too long ago. His smaller hands struggled to reach around his monstrous cock. It looked so much bigger on his small frame it was ridiculous… and arousing. A grunt escaped his lips as he felt that thick shaft was itching for more release. 

 

FAP! FAP! FAP! 

 

The mere act of beating that thick cock was enough to get Shirou’s mind to stop working for a few seconds, the waves of pleasure being so damn strong that his senses were being driven to an absolute demonic level, getting him to process something that only his first time in bed had gotten him to. He NEEDED TO COVER THAT BOOTY IN SOOOOOOOO MUCH CUM ~! 

Onii-chan , let me put a little something on to set the mood~! Just something from America!” Said his fat-assed little sister as she strutted to the sound system in the corner of the room. She bent down and he got an eyeful of her thicc loli ass. The sight made his dick throb and shoot out a lance of precum straight across the room. 

Then the music started… it was horribly trashy and raunchy. Men singing… or would it be rapping about women and their fat asses. Despite his distaste for that sort of music… the very second his little sister began to dance to it his mind blanked. 

“They call this twerking in America Onii-chan ! Hope you enjoy~.” 

Her movements were positively lewd as she swayed, gyrated, and shook her fat ass. His eyes were locked onto it and every clap and ripple captivated his hormone-riddled mind~. 

He couldn’t control himself anymore. Shirou hunched forward as he fucked his fists at an ever-increasing tempo to the sight of his little sister’s MASSIVE WOBBLY ASSMEAT. Drool dripped down his chin, his eyes went dull, and all his mind could focus on was Illya’s bouncing ass and stroking his throbbing dick! 

“Hehe, GOON for me my cute hung little brother!” Stroke that fucking goonpole for me! Let your fat-churning nuts build up a massive load of jizz!” 

An unending stream of precum dripped from his cock and lubricated his furious masturbation at her words. They were so… crass and lewd but they made him SO DAMN HORNY!! He was stroking his dick so intensely his precum began to froth up and make lewd sounds as his hands pumped up and down. 

 

FAP! FAP! FAP! 

 

The sound of his own masturbation turned him on even more but it couldn’t compare to the performance his sister was giving him~. 

Illya began to walk backward towards him and his frantic masturbation grew more intense as the object of his WORSHIP neared. Shirou snorted like a beast and bucked his hips wildly as he felt the massive soft globes around his burning hot shaft. 

With a soft seductive voice, Illya said one word, “ Cum .”   

And he did. His huge churning testicles clenched and his already massive goonpole expanded as an absolute torrent of thick cum shot from his cumslit. Gallons of glue thick shota nut covered Illya’s FAT LOLI DONK!!! 

Shirou grunted and snorted as he fucked the crevice of her massive ass while he unloaded his nut. Heavy and hot globs of seed absolutely coated every wobbly inch. 

Never before had the urge to FUCK WILD been so strong on Shirou, not even when Saber had requested a Mana Transfer out of him had his dong felt like exploding. And that was keeping in mind the fact his shaft wasn’t as big as it currently was, another whole level of massive that could be getting any bitch around wet and in need of breeding. He wasn’t sure what damn curse his older sister had gotten on him, but he was going to make the most out of it and let her know he wasn’t going to have any mercy on her fuck-holes! 

Oh no, quite the contrary. She’d teased him at worse levels than Medusa or Rin had ever gotten to do, and he was going to punish her for making him act like some brainless pervert! And he certainly needed to, because she was listening to such trashy American music that could turn someone as sane as him into some shameless fuck-addict in a matter of minutes even, he was going to flood that eager pussy with so much cum she was going to be as filled-up as some worn-out condom~. 

The music itself moved to another track, but as expected, this one was all about RAW AND UNPROTECTED FUCKING , the type of fucking that could get any whore pregnant in a matter of seconds even! “C’mon Onii-chan , keep cumming! You’re not gonna leave this room until you ruin my pussy ~.” The Teutonic girl giggled deviously, and that was precisely what the boi knew had to be donel None of his attempts at talking her out of indulging in lewdness had worked at all, so maybe breeding her like a beast unleashed would be the lesson that would correct her from the path of a cheap, money-hungry slut! 

“You… I’m gonna fuck you! I don’t think you’ll be GETTING ANOTHER COCK AT ALL ONCE I’M SOOOOOO DONE WITH YOU ~!” Shirou roared out, and the promise of the most obscene breeding that there could be was working, as Illya’s pussy was getting wetter at hearing such crass words coming from her younger brother. Heavens, she’d expected him to be something else when pushed to the limit, but this was getting more fun than she could even dream about. She certainly wanted to get fucked like an onahole, and she felt the time was right to make a run for it and conquer that dong with her cunt~. 

Shirou had done plenty of wild things during the Grail War, but nothing could compare to what he was about to do. He’d become an unleashed beast in need of breeding, and the one slut around was already inviting him to breed, so why not?! 

Making a run for it, Shirou ran all over the room to get at Illya, and the German girl HAD NO FUCKING TIME AT ALL to react to the Hero of Justice making his claim on her. She was expecting him to claim her any moment now, but right in the middle of her twerking?! Now that was so, soooooo fucking bold, and she loved it! “S-S-Shirou! You beast! You’re going to ❤️❤️FUUUUUUUUUUCK MEEEEEEEEEEEEE ❤️❤️~ !” She said with such need, as the boi was now getting to put his hands all over her, and thus the true fun finally began in earnest~.   

The now shota Hero of Justice roughly grabbed his sister and threw her onto the bed. His hands then gripped her widened plush hips, and with unrestrained thrusts, he attempted to slam his shota fuck-log into her tight cunny… but only managed to slide into the hot cum slick crevice of her fat ass. He was very tempted to simply squeeze those fat doughy little girl cheeks to relieve himself… but no, he had to correct this little fat-assed semen demon! He gritted his teeth as he focused for just a moment and, with that second of clarity, lined himself up.      

Illya let out a quiet yelp as she felt the battering ram that was her brother's fist-sized glans against her tiny and cute cunny. Her heart hammered in her chest as she turned to see Shirou’s eyes glinting with absolute desire, desire to reshape her little hole with his giant shota fuck pillar. She could feel his heartbeat as his massive glans spread her tiny hole with just its throbbing~ 

“Take me now Onii - chan ! I need your massive fucking dick in my tiny cunt!~!!” 

He snorted like a beast once more, “You don’t have to tell me twice, you little brat!!” He punctuated his sentence by prying open her tiny hole. Illya had, of course, practiced with toys before… but she had underestimated the sheer girth of his tool. Her wobbly ass trembled as he sunk inch after fat inch into her tight cunt. Her small hands held the sheets in a vice grip as drool ran down her chin. Shocks of pleasure shot through her body at every act her brother inflicted on her. The way he manhandled her and the strength of his shota body exhilarated her! And then there was his fat fucking cock . The way it wrenched open her walls, and the heat it exuded drove her fucking wild~! 

“Shhooo warm~!” She moaned as her dear, hung brother continued to slide his massive hot pole into her.        

Shirou let out a pleased groan as he bottomed out… for the most part. Much of his large dick still was outside of Illya’s vice-grip pussy… even if a fair bit was still hugged by her massive ass, but he wasn’t that far gone to force the rest in and hurt her…too much. He knew the little yet fat-assed girl enjoyed it rough from how her little cunt gushed at his treatment of her so far.   

The young brat was feeling absolutely blissed out the whole time, and his dick was feeling levels of pleasure that not even the best fuck-sessions with Tohsaka or Rider could get out of him. But it was bothering him to no end that it was his sister of all girls who was getting him so worked-up, and he really wanted to teach that damn slut a lesson she won’t ever forget about, especially now that she seemed so damn desperate for a bit of his dong! 

“Y-You fucking SLUUUUUUUUUT ~! I’m gonna give you something you should have learned long ago! Once I’m done with you here, your cunt won’t stop leaking cum for the whole week~!” Shirou growled as he was putting more pressure on the big-booty slut, his balls hitting harder against her backside as he kept on getting his shaft buried during the intense correcting-session. The girl had crossed a line, one of pure debauchery and lewdness, and if anything, he was feeling ready to do some of the most obscene things that could be done with such a fucking top-tier, heavy-bottom babe~. 

Illya’s mind was getting wrecked as well; the intensity of the breeding was much more than what she had expected, but she was getting precisely what she wanted out of her beloved Onii-chan , to have him unleash that inner beast of his. “ YOU ARE SOOOOOOOO ROUGH! I WANT IT~! I WANT YOUUUUUUU TO PUNISH MEEEEEEEEEE~ !” She had been planning to be the one in charge of the whole fucking, but the tables had been turned in the most unexpected of manners, but not like she minded it one bit, not at all. She had wanted to see her brother fuck her into oblivion, and she was getting just what she had been in need for the longest time! 

Shirou wasn’t sure if the damn tricks the girl had been playing into him were the reason he was acting like such a beast, but it wasn’t too important right now. Rather, what he wanted to do the most was to FUCKING FILL THAT DAMN BRAT UP AND MAKE HER FULLY AS HEAVY as some damn condom! He wasn’t even thinking about pulling out of her yet, but he really felt a strong urge to make her cunt an absolute mess, to make her mind explode from the constant stimulation that would be flowing from her cunt and make a mess out of the whole room, he was feeling tempted enough to see just how much of his ball-batter she could hold within her womb~.    

His small hips were a blur as he slam fucked his sister’s wet German cunt. Every time he pulled his dick out and slammed it back in, it sent a heavy buzz of pleasure through his length as her walls were simply divine.    

He grunted and groaned as he pistoned his hips, “You were made to be a fuck toy!” His now childish frame still held some of his previous strength, and so he lifted the fat booty brat and used her, “You living onahole~!! Take this fucking dick! Take your hung little brother's fat cock, you slutty older sister!!” 

Illya convulsed in pure bliss as orgasm after orgasm ripped through her body as her little brother used her. She hung limp as her body devoted every last bit of energy to pleasuring the fuck log prying open her cunt.      

She could only muster up enough brainpower to moan lewd and crass words, “Use me more! Use your older sister as a fuck toy! Please, Onii-chan~!! Mess me up goood~! ” 

Her fat ass rippled with every powerful thrust unleashed upon her body, and the sight stoked Shirou’s lust more and more. His dick still hadn’t bottomed out; there was one place and one place only he would dump his building load. He slid his vein-riddled length out of her till only his glans were still in that heavenly hole. 

With a hungry smile on his face, he said, “If you say so!!” Then he slammed his dick into her with all his strength and finally battered open her small cervix to grant him access into her baby room. He let out a long, pleased groan as his dick was finally hilted in her hot, writhing walls. Illya’s stretched-out cunt squeezed and convulsed around his girthy prick as a truly massive orgasm wracked her small body. She was so lost in pleasure that she squirted all over the floor and bed! 

She then went limp for a moment… but he wasn’t done. He held her with one hand, and with the other, he brought it down on that fat wobbly ass of hers! 

 

Smack! 

   

Illya jolted awake and squealed in pleasure as his booty wobbling slap! Moreover, her cunt squeezed around him pleasantly. Little slut was a masochist! 

“You asked for this. Don’t think you can pass out on me now~!” He growled as he hefted her up once more. “Look, look at how deep I am in you. It took the others a while to adjust to my length but here you are taking it on the first time! How long have you prepared for this, you little minx!”   

Illya’s eyes were transfixed on her bulging belly. She gathered enough strength to run a hand over it and shuddered as she could feel his hot meat pillar throbbing within her womb

Shirou was feeling it, his balls were producing enough sperm that they could fill up an entire dried-up lake and then some. It was no exaggeration either, because he was feeling those sperm-factories of his FUCKING TREMBLE the whole time, and it was making his ego explode like never before. None of the tricks that Rider or even Tohsaka had tried on him were capable of making him feel this desperate for release, or even gotten him to produce so much of the sperm he was about to unleash on his perverted older sister. 

“I’m gonna… I’M GONNA FUCKING CUM SOOOOOOOOO MUCH NOW! GET YOUR PUSSY FUCKING READY~!! ” The Hero of Justice moaned out, and just a few seconds later, his balls clenched powerfully, veins pulsed along their surface as the sweat-greased orbs worked overtime to send wave after wave of that sacred ball batter right to his cock, which then reached out and began to explode all into his dong. And the fun began, as his fuck-meat was finally getting to do the thing that the whore had been teasing him for the longest time. A tidal wave of cum was finally leaking out of the piss-slit of his shaft, and the minds of both siblings were collapsing at that moment. 

Illya was not expecting the sheer power and might from the leaking cock, and her plans to become the dominant one in the relationship were ruined as soon as she felt that ball slop crashing against her cunt. None of her attempts at giving pleasure to her cunny had been that good, never satisfying her enough, but this here? This WAS FUCKING WRECKING EVERY SINGLE ASPECT of herself, and her mind was only going blank as she felt the deluge of cum hitting her womb, spreading her inner walls as if she was getting possessed by some damn Sex Demon! 

Those waves of potent sperm were simply doing more damage on the Einzbern girl. None of her magical power and skills could do anything to stop the cum from having a mind-shattering effect on her, and if anything it was only making her cunt WETTER and her mind to reach new lows of sanity. Never before had such a powerful Mage become reduced into nothing but a cock-sucking, cum-drinking harlot, the Mage’s Association would be left impressed if they saw the heiress of such a powerful family had become nothing but a bitch who was willing to spread her legs wide for just a taste of cock! Not like Tohsaka or even that Edelfelt girl were saints, though…    

Shirou’s eyes nearly rolled to the back of his head at the sheer pleasure of dumping his backed-up load into his sister. With deep breaths, he grunted as his clenching nuts pulsed and pulsed as they continued to pump dense jizz down his cumtube and into his sister's overfull womb. Illya’s cock distended belly grew gravid as gallons of his potent nut stretched her baby room to capacity and beyond.     

He felt a wave of minor fatigue hit him as the last of his climax ended. He stumbled and managed to sit himself on the bed with Illya still speared on his still steel-hard erection. Even now, her walls were trying to milk even more of his shota seed out of him… even when their owner was currently checked out. 

Illya, the saucy and horny little girl that was his big sister, babbled in a lust-drunk state, “ Onii-chan you're killing me ~! Your FAT FUCKING DICK AND MASSIVE LOAD is frying my poor innocent mind! You BEAST!!! look at my body! It’s fucking ruined now! I looked like I’m knocked up with triplets~!”    

Shirou palmed one of Illya’s small breasts, the soft springy flesh was pleasant to grope, even if they were small. He then rested his chin in the crook of her neck and whispered, “I’m not remotely done with you Onee-chan~! By the time I’m done with you, you’ll be a cum filled blimp of a fat assed little whore!!” 

Illya shuddered, and her walls clenched along his throbbing length.        

Mhm , feels like you enjoy that idea? If how your lurid cunt squeezed around my shaft just now is anything to go by.” 

With a breathless voice, she replied, “ Yes~ please, Onii-chan~ make me into a sloshing BROKEN ONAHOLE for your personal use~!” 

He had a small smile as he felt his strength return to him, “Let’s begin round two!” 

Illay’s smile was brilliant as she said, “Fuck me up good!! ” 

But before they could begin once more, the door slammed open to reveal a pair of maids. Sella, the ever-dutiful one of the pair, looked incensed as she entered the room. 

“Mistress Illya! Are… you… okay.” Were the only words she could say at the sight before her. 

Leysritt walked in behind her and, with a dull tone said, “Woah, he really messed you up, Lady Illya.”     

Leysritt was the more lax of his sister's maids… and the more stacked. Unlike Sella, who was more petite. Leysritt was quite curvy. The dull-eyed maid’s large bust had on more than one occasion drawn his gaze. The large jiggling melons were very pronounced in what passed for the Einzbern maid uniform. The same could be said for her ass, a tight firm bubblebutt that jutted from her uniform. While Illya now eclipsed her in that department, it was still a very nice ass. 

Although that was the one department where Sella beat out Liz. Sella’s ass was much more eye-catching due to her more lithe figure. Even now, his eyes couldn’t help but travel down her slim upper body and to her widening hips that held what had to be a soft, squeezable ass .  

Sella did not miss his ogling… and rather than her usual flustered attitude, she had a hungry gaze as she looked upon his younger form. Her breathing grew heavy, and her cheeks flushed as her eyes ate up his young body. He could see her nipples pebble through her uniform and smell her intense and sudden arousal. 

Even Illya, who was deep in her cum drunk state, noticed the way her normally reserved maid looked upon Shirou.  

“You two want to fuck too…? I always knew you two were such perverts…” Shirou had seen those maids around before, and whenever they paid a visit to his home, they were interested enough when he did some training, and more often than not, Sella was always trying to offer herself up to give him a much-deserved shower. Now, he wasn’t one to turn down any offers, but the facts were clear: she was a shameless, addicted shotacon whore WHO NEEDED TO BE TAMED before she did something outrageous! He wasn’t going to let those two bitches get away un-fucked, that’s for sure~. 

“L-L-Lady Illya, would it be much of a bother if you would allow me to take care of Mister E-E-Emiya…?” Sella then asked, but the fucked-up girl was simply way, WAY TOO WRECKED to even say anything, aside from some weak moaning here and there. Both maids had different reactions to the whole scene in front of them, but if anything, Sella was getting wetter, her cunt was aching for some proper breeding and she wasn’t going to take a break until she got what she wanted, and fortunately she had gotten some permission to indulge in her own desires, at least she was hoping that had been the case! 

Shirou was feeling ready for anything the perverted maid wanted to do with him. His dick was not even tired, and he wanted to keep shooting any sperm his balls kept on producing. It was such a shame Illya was wrecked for the day, but that wasn’t going to stop him, would it~? Oh no, he very much would like the chance to make a mess out of another slut, especially one whose eyes had always been on him! Sure, he wasn’t as muscular as he usually was, but it seemed his appeal increased quite exponentially when he became turned into some brat… how would Artoria, Tohsaka, or even Sakura feel if they were to look at him in such a weakened, yet extremely ideal state? 

Sella then reached over, and despite the over-the-top size of his shaft, it didn’t seem like the fact it was heavier than either him or Illya bothered her, not at all. She pushed that perfect dong of his away from the girl’s cunt, and further moaning came from her as she was now getting to leak away all the cum that had been stored in her womb. Heavens, the way it was leaking away from her turned out to be the sleaziest, most perverted waterfall anyone could see, the slimy liquid already making a mess of the large bed, soon leaking to the floor — it was a mess that either maid would have to clean up, either with their tongues or asses! Leysritt licked her lips and her normally dull eyes lit up with hunger. She very much enjoyed working for Lady Illya and if this becomes a common occurrence, well, she wasn’t going to complain! 

“Now, you come with me, I’m gonna need to get you cleaned up~.” The phat-assed maid said, as she was now taking the boi right to the shower, and if anything, he was feeling totally hyped about what he could do with the slutty bitch there. His dick was aching as he was getting carried out of the room, and he just grinned at Illya that the girl was simply not going to work properly at least until the next morning, barely at that as well. 



------ 



Sella felt drool leak from both her mouth as she cradled the hung boi who was formally the muscle-bound stud Emiya Shirou. Although he was still very much still a hung stud… if much more her preferred type. He didn’t object to her teasing gropes as she carried him to the baths. Even as a tasty little morsel, he was still quite nicely built. Her hands ghosted over his lightly muscled frame and over his pulsing aching shaft. It was still slick with Lady Illya’s juices and the boi’s thick, nasty, potent nut. Her cunt gushed once more as the virile stench wafted into her nose. She inhaled sharply and shuddered at how horny it made her. There was a freshness to it that was different from how it usually smelled from his romps with the other girls. Nothing like the cum of a hot, hung, virile, young boy~. Lady Illya always had her and Leysritt observe her stud of a brother, and she had grown to appreciate his large muscular frame… but she couldn’t lie to herself. What really got her going was the lithe nubile body of a young boi!! Even better when they had a fat fucking needy shota cock that needs to be gobbled up!! 

Ah, she was getting very worked up. Just a little longer and she can indulge~ 

Ne , Sella. I can see you are… enthusiastic about this. Much more than usual. Is there any particular reason for that?” Shirou said in a knowing tone. 

Sella had enough control left to teasingly pinch the boi’s butt at that comment. He yelped cutely and quieted down as they continued their way to the baths… but she did discover something. Shirou’s little boy butt was very nice, soft, round, and springy! Her hand groped and teased it in a ‘soothing’ manner as to apologize for her pinch. When in reality it was an excuse to feel it up!    

Sella did not miss the way his dick jumped as her hand lingered near his little boy hole. She licked her lips at that sight. She will make sure he’s very clean by the time she’s done with him! 



------ 



“Awwwww FUCCCCCCCCCCK MY PUSSY IS FEEELING SO GOOOOOOOOOOD~ !” Illya moaned out, as she was feeling Leysritt getting to do some strong licking all over the girl’s wet cunt doing her best to shovel as much as Shirou’s thick nut down her gullet. Eating out her beloved master's cunt was a duty that she had performed with enough enthusiasm before she realized Shirou was her brother and thus, family. If anything, it was quite bothering her that the boi had stolen some precious time from what she enjoyed to do the most with Lady Illyasviel, and as such she was doing her best to make-up for the lost opportunities ever since then. And she was doing one good job given how the girl was reacting. 

“Thank you, Lady Illyasviel. I’m just doing the duty I was… created for.” The often serious maid said, as she was pressing her tongue all over that eager clit, and the moans of satisfaction and desire that were coming from the cute girl were making her feel even more motivation to keep going. That cunt was simply the best thing ever , and even if she had gotten to assist her master during those perverted orgies she had with Emiya at his household and helping to lick those vags of Miss Tohsaka or Miss Pendragon, they were simply nothing at all compared to what the Einzbern heiress had going for! 

The taste of that cunt was simply sweet, and even if it had become tainted by Emiya’s sperm, it wasn’t doing anything at all to make it any less tasteful for her liking. Rather the additional liquid was making her so, SOOOOOO HUNGRY for more of that wet twat, and as such her tongue kept on getting deeper into the eager hole. Ah, as much as she did her duty to give Emiya’s dick some cleaning whenever she was asked to, it could never compare to the divine feeling of licking that cunt, Illya’s cunt was simply so, soooooooo FAT and it could practically swallow every single thick, girthy thing that could manage to slide into its depth. 

It was such a blessing it was her sister the one having to deal with the perverted boi, even back in his true form she didn’t like the fact he kept on denying his desires for Lady Illyasviel, yet he kept on doing some of the most perverted things ever! They were always caught making out, or humping against each other until they blasted their brains out! And of course she and Sella were the ones cleaning up after such an obscene mess, trying to wipe away cumloads from the ceiling or the family car, it was all so… so obscene! 

And speaking of Sella… 

 

------   

 

Upon arriving in the baths, Sella promptly stripped. She would be getting quite wet very soon after all… well, more wet. Her cunt was quite sodden as it dripped with needy lust. The maid was quite happy to see that Shirou’s flagging erection spring to life once more upon gazing at her body. She may not be as busty as Leysritt or even some of the other harlots the man-turned boi kept company but she was proud of her hips and ass! The maid’s breath hitched at the way the boi ogled her body and his massive dick throbbed in time with his heartbeat.    

Ah~, she absolutely loved the way he looked like this. Small, cute, and not musclebound! Yes, Sella much preferred him like this, particularly the way his massive appendage looked on his smaller form~. 

“Let’s get you cleaned up young man.” She said as she led the boi to one of the stools. He sat his cute boi butt down and she got to work. Her deft soapy hands cleaned every last inch of his sweat and grime covered body. She had taken the opportunity to grope him as she cleaned him, particularly his cute boi butt! 

“S-Sella why do you keep focusing on my BUTT ~!!” He moaned as her finger slipped into his boi hole. His dick jumped and spewed a rope of precum all over the bathroom floor. 

The maid leaned in and whispered into his ear as he shuddered as her slender finger pumped into his ass, “I have to make sure you are clean everywhere~. ”    

She didn’t leave his dick unattended, with her free hand she struggled to wrap around the immense girth of the shota’s fat log of fuckmeat. Ah~ she got so wet as she pumped his jumping length. She loved how it got even harder as her finger stirred his ass~! His normally manly grunts of pleasure were transformed into adorable moans that stirred her libido to new heights.   

She licked her lips and pushed the boy onto the floor. His pre-leaking throbbing dick bopped between his legs and the maid got the perfect view of his puckering boi hole between his soft shota cheeks. 

She dived in with no hesitation. Her hands gripped his cheeks and her tongue began to dig out the boi’s ass. Shirou’s moans grew louder and he could not muster any strength to repel the boi crazy maid from rimming his ass. 

His dick throbbed and pulsed with pleasure he hadn’t experienced before, pleasure coming from his booty!     

“S-Sella~! I-I feel weird!” He couldn’t help but moan. His earlier bravado and show of dominance all melted away the moment the maid began to tease his ass. It turned out that Rin wasn’t the only one with a defenseless ass! 

Upon hearing his mewling voice, the maid redoubled her efforts. With her years of experience tending to her lady’s needs, she ravished his small hole.    

His hole then tensed and then she heard fat wet splats hitting the floor. A flood of his boi seed stained the tiles and his moans grew louder. Steam wafted off the hot nut and the stench made her feel hot. 

Sella did not stop as her desires hit their crescendo, she wanted to mess up this boi butt! She had to show this arrogant hung stud his place! How dare he defy and defile her dear Lady Illya!     

She then gazed at one of the baskets in the bath, which carried many kinds of perverse toys. Her eyes narrowed as an idea came to mind. 

Among all the nasty toys that there were in the basket, one of them was the ideal one for the current debauchery happening, and made even better by the fact that it was even made after the very same dong Emiya got hanging between his legs! Sure, it was a plastic, fake thing, but it was still matching everything the man-turned-boi’s dong had, down to every single vein that was all over its surface. It was simply the most ideal fuck-toy ever, and right now Sella knew it was the best tool to give some punishment to the brat. 

“I’m gonna do something Lady Illyasviel should have done a long time ago! I’m going to SPREAD YOUR HOLES REAAAAAAAAAAL WIDE with this thing!” It didn’t take long for the perverted maid to get a hold of the fake dong, and seeing the straps on it, she got them wrapped around her hips, and she grinned as she even noticed there was a sperm-container as well, matching the same watermelon-sized balls the boi had. It would had been so amusing if Miss Tohsaka or even Miss Edelfelt were around to watch their beloved man become nothing but a bitch for massive dong, to see him beg for mercy~. 

W-W-W–W-WHAT ARE YOU GONNNAAAAAAAAA DO TO ME~ ?!” Shirou asked in a panic as he turned around to see just what Sella was talking about. At the sight of a plastic copy of his dick, he had a feeling like the perverse maid was going to do something that would put every single sexual act he’d done to shame. Not even when he fucked both Rin and Artoria for some Mana had he felt this level of intensity, and he was the one about to get something that would ruin his body forever. Hell, he was sure his older sister was coming up with some plan to keep him as a boi for the rest of the days, and as such he was going to become the plaything of both the heiress and her maids for as long as they saw fit! It was such an apocalyptic scenario for his booty and even his mouth! 

Of course, there was something else to the fake dong that Sella knew would be so amusing to try on both herself and the boi, but mostly herself; it was a magic-powered tool for breeding, and as such it was going to be extremely fun to see how it’s going to affect her energy and breeding skills. “Okay, your fucking boi, I’m gonna do some deep-cleaning now, I’ll make sure your booty gets the rough treatment it deserves!” The maid exclaimed, as she was getting ready to claim that booty for herself! Ah, it was going to be such a funny thing to talk about if the brat ever turned back to his older self, as if that’s ever gonna happen though. She then giggled as the boi gulped and attempted to scramble away from her as if there was a possible escape from his new fate as a loyal fuck-toy for her Lady and herself.      

With a snap of her fingers, she enacted a mystery to bind the boi in place. The maid giggled as he was frozen on his hands and knees, “Hehe~ presenting yourself to me? It won’t stop me from rearranging your guts, young man!”   

She knelt down and the dildo slapped wetly on the boi’s back. Drool spilled from her lips into her waiting hand. Once her fingers were slick, she inserted them one at a time into the boi’s winking asshole. She wasn’t a monster so she’d prepare him a bit more. She loosened him up a little earlier, but now she was to get him ready to take this fat thing now swinging between her legs. 

Shirou shuddered as the weight of the dildo on his back and of the feeling of the maid's fingers in his ass. He could not move an inch even if he strained himself. He hated how he moaned sweetly as she plunged her fingers deeper and deeper into him. He hated how his dick spewed precum in pure pleasure, even if his dick hadn’t been touched. The boi then let out a muffled groan as he felt yet another finger slide into his ass and spread his hole wide~.    

Uhn~” 

“Such sweet moans~! Ah~ I can’t hold myself back anymore.” Crooned the maid as she removed her fingers from the boi’s ass. She then spit on the plastic dick between her legs and lubed up the massive rod. 

“Ready to be broken into a toy for the Einzbern Shirou~!” She said as the fat knob of the faux glans pressed against the boi’s hole~. 

She didn’t let him speak as she slammed the length deep into him… and at that moment, an enchantment on the strap-on activated, and Sella’s mind was flooded with the feeling of the boi’s ass gripping her length. 

She let out a low, almost masculine groan, and he released a sweet feminine moaned as their faces screwed up in pure pleasure!       

“Y-Your ass FEELS SO GOOOOD~” She moaned as she began to frantically pound the boi’s sinfully pleasant hole. The way it hugged and coiled around her length was unlike anything she had ever felt! It was like the boi’s ass was made to be pounded! She felt the churning cum tanks stir to life and release a steady stream of precum from the tip of her fake dick. Every slam of her hips grew easier as the boi’s ass grew more lubricated. She only increased her intensity and tempo to bring herself even more pleasure! 

Shirou in turn, could only moan like a girl as his hole was wrecked by the maid, “W-WHY D-DOES IT FEEL SOO GOOOD~!!!” His face was much like Illya’s earlier, completely screwed up in pleasure as his hole was spread wide. His dick swung and bobbed uselessly as it PISSED ropes of thick cum everywhere . With every slam of Sella’s hips against his plush boi butt, she ground the head of her fake dick against his prostate and made him cum over and over again! 

For Sella, it was quite amusing to see the tables turned around. Emiya already had something of a reputation as being the most fuck-addicted male in all of town, surpassing the likes of that weird Matou heir whose reputation kept on hitting rock-bottom the more he tried to claim the same bitch-magnet reputation as his so-called best friend. It was just making her tempted to also try and fuck that dumb himbo with her dick, but that could wait, because right now she was feeling her senses getting activated EVEN MORE as she kept on slamming herself deep in that perfect boi booty, grinning as she heard Emiya moaning more and more~. 

“T-Take this, you dumb boi! I’m gonna make sure ALL YOU THINK ABOUT FROM TODAY ON IS BEING LOYAL TO LADY ILLYA AND NO ONE ELSE! THOSE OTHER BITCHES YOU FUCK AROUND WITH ARE GONNA HAVE TO KISS HER BOOTY IF THEY WANNA HAVE A GOOD CHANCE AT FUCKING WITH YOUUUUUUUUUUUUUUU~ !” The perverse maid moaned out as she was feeling wave after wave of pleasure cross her body, her hips moving faster as she could already feel herself preparing for what could become a climax that could outdo everything he’d gotten to do with not just Lady Illyasviel, but also with those other broads that were always at his home! 

Shirou wasn’t even getting to believe it was him the one getting fucked. Never in his whole life would he have found himself getting practically ruined, and even by one of his older sister’s maids! But everything was starting to make sense for him, he knew the girl had been thinking about ways for him to become obedient to her deepest of desires, and what better way to achieve such a goal than by turning him into a loyal fuck-pet? A bitch whose sole use would be to do anything the girl wanted, turn his brain into fucking goo as she used that damn dong for her own pleasure, spreading his bootyhole as wide as it could possibly get. 

He wasn’t even sure if he could manage to make a run for it and leave the girl’s perverted castle, knowing her it would be certain there had been multiple traps set already to make sure either him or either of his girls would make their way in and out of the castle, and as such it was going to take some miracle for him to be allowed to escape. That, and he knew Illya had plenty of nasty tricks hidden, her own Servant would be catching him if he even thought about making his way out no doubt. And worst of all, he’d be getting his booty fucked against as punishment for even thinking about such obscene needs, his freedom becoming a sin! 

And then… Sella felt her dick about to explode. 

AWWWWWWWWWW FUCCCCCCCCCCCCK YEAH I WANNA FUCKING CUMMMMMMMMM! YOU’RE FUCKING MAKING ME EXPLODE SO MUCUCUCHCHCHCHCCHHCHC GET FUCKING READY YOU BITCHCCHCHCHCHCHCHCHCCHCHCH~ !” The maid barely had time to warn the boi about what was to come, and with one final thrust, she finally slammed that fake cock fo his to the full depths of Emiya, and the boi himself could only moan with all the might of his lungs as he finally got what he deserved, nothing but the total wrecking of his defenseless booty with that girthy, nasty fake dick! And right now, something was getting his bootyhole even wider than it already was! 

Sella’s lips were stretched out and her face could only be described as disgustingly lewd as she let out a low, almost primal groan as her hips bucked against the bouncy boi booty while her fake nuts unloaded themselves. With every throb, more and more of the store nut was dumped into Shirou. Steadily the boi’s belly grew distended from the sheer volume of seed pumped into him, all the while, his own dick had unceasingly released a stream of semen uselessly all over the floor as his prostate was pummeled. The puddle had grown into a small pool from how much cum he released from getting fucked like a whore. 

Sella stumbled back and slowly, the length of her fake dick slid out of Shirou’s abused boi hole. it gaped and winked as it tried to close. It was then that a certain clarity overcame the maid.     

“O-Oh dear, what have I done?!” She mumbled to herself. The maid, now frazzled without being fueled by her libido, quickly began to clean up to the best of her ability. The strap-on was returned to its basket, and she then washed the boy once more. He was in a daze as she cleaned him. Soon enough, she hefted his cumbloated form up and into the bath, to which she joined a moment later. The water was perfectly warm, not too hot or too cold. A pleasant floral scent drowned out the intense scent of semen that had dominated the bathroom. 

As she got settled in the massive tub she shifted the dazed boy into her lap. She slowly rubbed his head as he sat in her lap and the boy melted into her gentle touch. His eyes still showed he was far away as he rode out the aftershocks of her brutal assfucking just a few minutes earlier.     

Despite feeling bad about what she did, she could not deny that it was very fun, and she wouldn’t mind doing it again. But for now, she would enjoy a nice, relaxing bath with the cute boi~. 



------     

 

Leysritt and Sella were feeling quite impressed by the debauchery that had happened during the day, and they were certain it was going to become a routine from that day on. Nothing wrong with some horny antics, though, as long as Miss Illya herself was the one calling the shots, there was nothing they wouldn’t do to satisfy her desires, no matter how obscene they could be. And right now, it was quite a relief that everything was done for the day. 

Both maids were getting the two brats over the main bedroom, that is, Illya’s, and everything had been set so any traces of the lewdness that had happened not too long ago were impossible to notice. It would take just enough of a pervert who got down for horny acts daily to notice the scent of raw cock, cunt juices all over the floor and the like. Sure, the maids had done more than enough of a good work to ensure there would be nothing noticeable, but there was the fact that the matriarch of the household was going to be back soon and… Mister Shirou was still a runt. 

“Oh my, I hope Miss Irisviel doesn’t get angry.” Sella said, as she was wondering just what the woman’s eventual reaction was going to be; of course, she was quite the type to spoil her family, and she wasn’t quite into punishing them, rather she would maybe talk with them a bit about what they have done and similar. Still, the fact that Miss Illya had turned her younger brother into an even younger boi would require a good explanation, and the fact that the girl wasn’t even thinking about turning him back to his regular looks was truly going to ensue into something amusing soon enough. 

How was Miss Illya going to explain Shirou’s FAT FUCKING COCK shaking around as he took a shower, or worse, the girl’s own massive booty. She wasn’t quite bad-looking by any means, and yet her mother certainly wasn’t going to take it easy if she were to see her beloved heirs with such looks. But maybe she wasn’t going to get too angry, right? Maybe she was going to just talk with them for a few hours, and then convince her daughter to turn her brother back to his true self! 

“Unless… Miss Irisviel too is a pervert?” Liz suggested, and that was enough to earn her a smack on the back on her head from Sella. 




------ 




Irisviel was finally done with all the work that came from the Mage’s Association at London. It was all so tiresome, but once she got it done, she spent a day for herself and got a few things for her family at Fuyuki. She knew her beloved Illya would like a few fashionable clothing, and as such she had been bringing enough of it for the way back. And for Shirou? Maybe a few authentic swords that she had managed to find from a certain blacksmith; of course, she had a bit of a hard time explaining it at the airport, but that wasn’t a big issue at the end of the day!   

“Ahhh, I can wait to get back home, I’m so excited to show Illya and Shirou their new gifts!” The airhead of a mother thought with delight, as she was already on the transport that was to take her back home, the luggage practically filling up most of the vehicle, but she knew her trustful maids would be giving her a hand when she got to the manor. 

Irisviel’s head bobbed to the Eurobeat hammering out of her car's speakers. The heavily modified, both my mundane means and magecraft, Mercedes-Benz 300 SL tore down the road at a pace that left any passerby shocked with wonder and fear. She always loved to drive herself; it was always so fun! Just the thing she needed to unwind after a long flight! 

She pressed on the gas, and the speedometer climbed higher and higher. She licked her lips as she knew the tight corners of the winding mountain road were soon to come. Her delicate fingers gripped the stick shift as she changed gears in perfect time to defy death. She felt a pleased shudder within her core with each winding turn that could have ended with her driving off the mountain.         

Irisviel was almost disappointed when her fun came to an end as she slowly pulled into the driveway of the castle. She still felt the flush of adrenaline and pleasure in her veins as she parked the car. She may have to indulge in some of her toys to settle the restless feeling~. 

She did not have to wait long for a pair of maids to exit the castle and attend to her. Sella and Leysritt were dutiful as always! 

…Although. There was something a little different about them. She placed a delicate finger on her lip as she watched them handle her luggage. She shrugged as she would find out eventually. Now to go greet her baby!!    

Her heels clacked on the castle floor as she walked to Illya’s room. With every step, her mature and full Venus-like body jiggled and rippled pleasingly. She then stood outside her daughter's room and felt a bit sneaky. She quietly opened the door to see a pristine room… but her nose twitched as certain scents were inhaled. 

Oho~, had her cute daughter finally captured her big, strong brother's heart and gotten into his pants! Irisviel giggled quietly to herself as she stalked into the dark room and over to Illya’s big, fluffy bed. 

It was then she noticed something a bit peculiar about one of the figures sleeping peacefully in the fine sheets. Shirou was smaller, a lot smaller. He was about equal sized to Illya! 

…And, and he… WAS SOOOOO CUTE!!!     

Irisviel bit her lip to contain her squeal at how adorable her son (adopted or not) was! She wanted to put his head in her lap and run her fingers through his hair while he slept~! She then paused as she noted a growing tent in the sheets. She blinked owlishly as the tent grew and throbbed.             

And suddenly, the heat in her core was reignited with a passion as her feminine instincts, long dormant, roared to life at the sight of the towering breeding pillar just hidden behind a thin sheet.    

She sniffed the air and shuddered at the masculine scent that began to fill the air. She licked her lips, and her hand gently grabbed the sheet. She then slowly began to unwrap her gift~

Her now sodden quim clenched at the sight of the now revealed long fat shota cock! It was so… intimidating~

Irisviel’s nipples hardened into diamonds and became lewdly prominent even under her clothes as she gazed at the magnificent cock. It towered at a cunt busting forty-three inches, a size that could remake women into mewling sluts. Its girth was immense, like that of a large man’s clenched fist! She shuddered at how it would feel inside her! It would split her open ~! 

And the fat gurgling sperm factories he called his balls! Heat and musk radiated off them that only further slickened her cunt! No wonder her cute daughter had a lewd face as she slept if that concentrated ball stench was raping her nostrils and causing naughty dreams!

Irisviel was a tad jealous. 

Her beloved daughter had managed to fuck Shirou… turned him into some cute boi and all, and she had gotten to milk those heavy balls of his around for days?! Oh, now it felt like it was time to make a run for it as well, she wanted to get some nice drops of his sperm for herself, and she wasn’t going to rest until she got what she wanted, and right now she wanted to get it all for herself, she wanted to get some loads of cum deep in her mouth, in her cunt even! 

“I’m gonna suck you… Illya has had her fun already, it’s time for mama to get some cum for herself~.” The woman giggled like an idiot, as she then reached over, and once her face was close enough to those nice balls of his, she went ahead and got to press her own pretty face right in the middle of those sperm factories! She was hoping her boi wouldn’t awaken right at that moment, because that would mean Illya would get awakened too and thus ruin any of the potential fun she could be getting to have with that bratty boi of hers. 

The way those balls were shaking, the way she could even FEEL all of that potent sperm of his sloshing around in his balls, there was no denying the boi was the type that could be making a mess out of her, it had been a long, long time since she had felt an urge to breed, and what made a difference was the fact she wanted to fuck as if she was nothing but a cheap onahole! She wanted her boi to use her as nothing but some toy meant to satisfy a dick, and she was more than willing to indulge herself in such a role, as long as she got some heavy drops of that cum in her cunt, she was going to do it! 

Right at that moment, her tongue lolled out of her mouth, and the wetness it had was now getting right into the sperm factories of the boi, and the very first reaction that the boi did was to groan, almost as if he was telling there was someone working around his cock. “Unghhhh…” She heard her boi moan out, and thus she had to work a bit slower, otherwise any of the potential fun that she may have would be ruined, and then she reached out for that perfect cock of his, and both of her hands could barely get to wrap around the thick meat, making her feel intimidated by how potent, how meaty it was~. 

And then, she had an idea. Moving a hand from that thick cock, she was now having a finger from said hand dance across his cute chest, and that’s when she used a bit of her magecraft to invoke a bit of hypnosis, that was the one idea she had to make sure the boi would keep on sleeping, and as she noticed it was working, she felt satisfied; not like she wasn’t against the idea of fucking with his cock, but all in due time! Right now, she was about to choke on that cock… 

She hefted the log of breeding flesh, and her lust soared higher and higher as the sheer weight of it aroused her like nothing else. Her fingers traced pulsing thumb thick veins as they pumped fresh hot blood into the mammoth boi cock. Light delicate touches that caused it to pulse and throb under her grasp, all the way to the fat pre cum spewing helmet~.

The woman couldn’t contain herself any longer. She buried her face in the crook between the hot heavy log of flesh and the churning cum factories and inhaled. Her core clenched as the boi musk raped her brain and she came. Hot, feminine fluid stained her panties as she shuddered in orgasm. She huffed and huffed as her brain attempted to reboot itself and when she finally managed to regain some sense, she dragged her tongue along the fat cumvein of Shirou’s fat boi cock. Slowly she savored the taste of his steamy sweaty cock. From root to tip, she licked, and halfway thick globs of sweet boi nectar greeted her tongue. Irisviel came one more time upon her first taste of Shirou’s pre seed. 

She needed more .    

Irisviel barely contained her cocklust as she finally finished dragging her tongue along the underside of the boi’s battering ram glans. She teased the sensitive helmet with flicks of her tongue and an unending stream of hot boi pre-cum was her reward. She could drink from his all day! But she wanted something with a bit more… heft to it. She ripped herself from the tongue bathing his wonderful cock for just a moment as she prepared herself to fuck her face on his godly boi cock.         

She stared at the pre-cum spewing slit with a great hunger and then opened her mouth wide. Her plush lips encircled the fat glans of Shirou’s cock and she sank inches upon girthy inches of his wonderful dick down her throat. With every inch that vanished down her gullet sprays of fem cum blasted from her cunt. Soon the room was filled with the scent of a bitch in heat. 

And then Shirou’s cock reacted as the scent excited the boi it was attached to. The mammoth log of boi flesh pulsed as it came alive, alive with desire to BREED~.  

Irisviel made a choking noise at the sudden movement of the cock lodged in her throat. But she would not be stopped! She narrowed her tear-dripping eyes in focus and grabbed the base of the cock. With one fluid movement inch upon inch of fat boi cock slid from her gullet and the tip rested on her lips, and then with another movement it was all stuffed back in! Back and forth she choked on the massive slab of cock. The sounds of her lurid sucking echoed in the room. 

 

SCHLURP~! SCHLURP~! SLRPLTPH~!

   

Irisviel let out a huff as she sucked in a gulp of air as she released the pulsing length of boi cock. Shirou was just about to pop! With a rough (magecraft empowered) yank, she ripped her blouse, and her hefty breasts were released! She wrapped the sinfully soft masses of titflesh around Shirou’s burning hot rod and squeezed them tight. She titfucked him hard and fast while her tounge danced and teased his cumslit. The way his hot girth felt between her tits was sinful~ 

 

THROB~! 

 

With a massive throb she felt it, the hot torrent of cum that surged through his cock. 

“Give Mama your hot, heavy load~!!” She moaned as hot lances of boi spunk showered down on her. Each scalding rope of heavy jizz landed on her pale flesh with Splats and Thuds. Her cunt clenched with each and every rope that impacted her body.

But it wasn’t landing on just her body. The hot fatty ropes of boi jizz landed in her waiting mouth. Irisviel had to chew the thick boi nut to get it down. 

And the taste! It was truly divine~!   

Shirou stirred as his powerful orgasm was enough to break the light hypnosis. His eyes fluttered open and she greeted him with his cum splattered all over her beautiful features. 

“Good morning sleepyhead~ I hope you don’t mind, but I helped myself. Hehe~.” 



To be continued…