Chapter Text
"Working another late night?" Lilly asked as her brother once again got up from his dinner. He had scarfed down his food like a ravenous animal in under five minutes, leaving no time for small talk or conversation of any kind.
"Work never ends on a farm," Jonathan grunted. It was the same sort of excuse he always gave.
"I made dessert," Lilly said. She knew where he was really going to go, but she wanted him to stay with her, at least for a little longer. Ever since their father had died and left the stud farm to them Lilly had become more lonely than ever before. She had to pull her weight helping out and so had dropped out of school. Her friends stopped calling because the only car they had was Dad's old manual Diesel truck that she didn't know how to drive and she could never leave to see them.
She had begun to rely entirely on Jonathan for companionship and entertainment. More than he even realized.
She could see him warring at staying or going, and relented a little. "Let me at least cut you a slice. You can take it with you."
"Okay," Jonathan finally conceded. He hesitated a moment, then took his cowboy hat off and sat back down at the big kitchen table.
Lilly felt her brother's eyes on her as she got up to clear the dishes and get the pie from the oven, where she had been keeping it warm. Did he notice how tight her little tank top was? Did he admire her smooth, toned legs peeking out of her much too short shorts? Did he have any clue she had been trying to seduce him for months now?
She made a show of bending over at the oven, wiggling her ass as she pulled the pie out, but when she impishly looked over her shoulder to see her big brother's reaction, she found him staring off in the distance, in the direction of Dad's old workshop.
Pouting a little, she quickly got two plates out and started cutting up the pie. "M-maybe I could come out and help you work tonight?" Lilly suggested. She wanted him to notice her so badly. "You're making more stud cream, aren't you? Perfecting the mixture?" She inwardly cursed her nervousness.
Jonathan didn't react until she said "stuff cream" and then his head snapped toward her. His face worked to replay her last words. "It's not the sort of work you need to worry about."
"Yes, it is," Lilly insisted. "We are equal share holders now. I should know how everything works."
"We're not equal shareholders until you turn eighteen," Jonathan reminded her. "Anyway, Dad left 51% of the farm to me."
"The stud cream recipe is more than 1%! I should know how to mix it!" She set the pie before him, turning her voice softer and more sultry. "Besides, I want to help you." Her young, lithe body rubbed against his muscular shoulders as she leaned across him to set down some silverware.
How desperately she wanted her brother to snap with arousal, grab her and fuck her up against the table, but Jonathan didn't move. He didn't even seem to notice her.
"There's nothing you can help me with." He stood up again, grabbed his hat and the pie and turned to go. "Thanks for the food."
Deflated, Lilly watched her brother go, just like he always did. "I can help you," she insisted, but he was already gone and she knew where… and why.
For months now Lilly had watched her big brother sneak out of the house in the dead of the night. Ever since he'd moved back home six months ago, after Dad died, she'd noticed his suspicious behavior. After a few times watching him sneak away, she started followed him to see what he was doing. They lived twenty miles from town, down a dark, dirt road and she never heard Dad's noisy old truck start, so she knew that meant Jonathan wasn't leaving the farm.
The first time Lilly followed Jonthan, she was surprised when he headed toward the stallion pen, but soon discovered it wasn't the prize horses he was visiting. It was Dad’s nearby converted barn/workshop that he unlocked and slipped inside. The workshop was where Dad had masterminded and kept his award winning, highly coveted and closely guarded stud cream. It was this cream that had turned their modest horse farm into a money-making machine. When the cream was applied to the stallions over the course of several months, they became champion breeders, bulking and stretching their bodies with muscles, with every mating successful, always producing hardy and strong off-spring.
It was this same stud cream that Lilly had watched her big brother secretly rub on his cock night after night, until he came. At first, she thought it was just masturbation; that was a concept she understood but didn't completely understand having--at that time--never done it herself. After six months of nightly applications, though, she realized it was more than masturbation: Jonathan was changing his body, becoming broader and muscularly toned. His cock, which had been average when he'd started using the cream six months ago, was now huge. Not just appreciatively bigger, but massive. Lilly suspected when erect it now rivaled her forearm with the dark, red head as big as her clenched fist.
None of the farmhands nor Uncle Bill, who came to help on the farm every week, had noticed the change, as far as she could tell, but she saw how big her brother’s body, and more so, his cock was now. Even flaccid during the day, he had to swagger to contain the behemoth between his legs. She noticed, too, the times throughout the day when he had to stop working and go jerk off in secret somewhere because his arousal was always so high.
Even so, every night he went and applied more cream, growing ever bigger. Like clockwork, every night Lilly snuck out after him, and to her shame and addiction, she hitched up her nightgown, put her hands between her legs and rubbed her clit to the sight of her big brother stroking his massive cock until they both came. She understood his obsession with masturbating very well now.
For six months Jonathan had been obsessively growing his body and cock, and for six months Lilly had been obsessively getting off on watching him do it. She knew it had to stop though. He was already too big. His obsession was destroying his chance at ever being able to actually use that cock on a woman, though she knew he longed to. Her obsessive nature had led her to discover her brother's online dating profile. At thirty-six he was well past the age he should've been married, but the women he messaged were always in their teens and early twenties. He always quickly—proudly—shared pictures of his chiseled abs and massive cock and described his desire to find a woman willing and able to take it all. Lilly knew he'd been on a couple of dates, and knew that he'd come home sexually frustrated from all of them.
After one particularly failed date, when the farm was empty of hired help, Lilly watched Jonathan spend the whole night in the barn workshop furiously fucking an entire jar of stud cream. He fucked it three times that she'd witnessed from her secret peeping spot, and he didn't come out until hours and hours after sunrise, so she knew he'd probably done it many more times that night as well.
Rejection just fueled him; made him want to grow even bigger.
Ever since that night, a deep, gnawing emptiness had begun growing inside Lilly. When she watched Jonathan now, she encouraged that maw of emptiness inside herself, willing her heart and mind and body to obey. She was young; an unkissed virgin of only fourteen, but she knew now, somehow, inside her was the hole that her brother’s cock was meant to fill. She didn't know how she could ever stretch to take it, but she knew it was her place. She masturbated to the thought of it every night that she watched Jonathan, dreaming of how her brother would open her up and split her apart as he finally sank his behemoth monster into her virgin tightness. She knew it would hurt, maybe it would even kill her, but she was utterly committed to it. She was as obsessed as he was. When she masturbated in tandem with her brother, she felt that chasm of emptiness inside her stretch and stretch, opening up to swallow the cock it saw but couldn't yet taste, and she knew she could do it.
Someday, somehow.
But only if she could get him to stop growing it now. Enough was enough. Lilly knew in her heart she was meant to be the one to take her brother's massive cock down to the hilt like his online profiles sought, but she knew he was already beyond her limit. The stud cream was going to give him a horse-sized cock, or bigger, and if that happened, she'd never be able to fulfill their shared dream.
At least not yet. Perhaps he could grow more later, after she learned to take him at his current size, but he couldn't get any bigger now if she ever hoped to house him in her cunt.
Lilly researched what she could expect to happen to her on the internet (and jealously watched videos of women taking cock-toys so huge even Jonathan would be envious), and she checked the work schedules to see when Uncle Bill and all the hired help would be gone, and she masturbated and masturbated to the thought of going through with her plan. When the stars aligned and the week all of the hired help was off work finally happened and Lilly and Jonathan were left to mind the farm alone together, she knew it was time.
--
That night, when Jonathan snuck into the barn workshop for his nightly secret masturbation-growing session, he found the room already occupied. Lilly had spent the day preparing, and dragged in a mattress and pillows and blankets. She'd brought out a cooler full of food and water. She'd taken two of Dad's prescription painkillers leftover from when he'd thrown out his back a few years ago, from before he got sick and died. And she'd prepared a bottle of lube. She was determined not to leave the room until her brother had finally put that glorious cock he'd grown to good use.
When Jonathan opened the door and turned on the lights, he was greeted by the sight of his petite, fourteen-year-old sister stretched out on the mattress. She was only wearing an oversized, silk-thin, short night gown. Her nipples were hard in the cool night air, poking out against the fabric, and the right sleeve had drooped down exposing her pale shoulder. There was no mistaking the look in her eyes what her intentions were.
"L-Lilly?" he gasped.
Lilly had already masturbated twice in preparation for her brother's arrival. Once out of the knowledge that it'd be easier for him to penetrate her if she was already aroused and wet, and once more because the thought of actually setting this all up and having it actually happen got her so turned on again. The maw inside her hadn't opened up yet, but as she looked at him now and noticed the flaccid bulge already straining at his jeans, she felt it beginning to stir. "I've watched you in here for six months now," she said in a low voice. "I've seen your dating profile. I know what you need."
She rolled onto her back, propped up against the wall and pillows, and spread her legs to reveal her wet, pink slit to her big brother. She hadn't worn underwear in months, just in case he'd ever accidentally caught her peeping and mindlessly decided to have his way with her. As Jonathan's eyes widened, Lilly felt her pussy lips part, gently peeling open to reveal her virgin hole to her brother. "I need it too," she whispered.
"Oh my God," Jonathan whispered, but while his eyes were transfixed on his sister's perfect pink pussy, his hands were unfastening his jeans with unconscious, practiced movements. In just a few seconds he had his pants around his ankles, releasing the behemoth beast that constantly yearned to be free.
Whatever morals Jonathan might have about fucking his underage sister they did not trouble his cock. Already it had pumped hard enough to stand on its own, and precome liberally dribbled from the tip, as if his cock was drooling at the decadent treat displayed now before it. Lilly knew that cock belonged inside her, and even if Jonathan hadn't yet realized it his cock knew, too.
"Don't think about it," Lilly encouraged. She had practiced just what she'd say when this moment finally came. "Just do it. Kiss me, and then line the head of that glorious monster you've created at the entrance to my tight, virgin pussy and don't stop until you make me take all of it."
Jonathan was on her within seconds, crushing his mouth against hers and already panting hard. He wasn't thinking rationally, and Lilly knew and loved it. His cock controlled him utterly. He was as much as slave to it as she soon would be. She kissed her brother back passionately, opening her mouth to her first kiss and soaking in the bliss of the experience. Jonathan was so big and strong and warm. And already between her legs she felt his cock nudging around. She eagerly pulled her gown off, over her head.
"Lilly," he gasped into her ear as they broke the kiss. His eyes raked over his sister's slim, naked body, drinking in the sight of her hard pink nipples, her flat tummy and pretty, nearly bald pussy.
The maw of emptiness in Lilly was growing. "I'm a complete virgin," she whispered back, pressing her fingers into his arms. "I've never even used a dildo in this tight little pussy." She felt the arousal that shot through him at her words, as she knew it would.
The huge, blunt head of his cock found the wet spot between her legs and pushed, but it did not--could not--go in.
Not yet.
"You want it bad, don't you, Big Brother?" she panted, stroking his arms. She wanted it badly too, and spread her legs wider, repositioning herself on the mattress. "You want to stretch out your little sister's virgin pussy with your glorious, huge horse cock?"
Jonathan let out a primal growl of approval. His precome soaked her pussy, better than any lubricant could have. She felt a tingly numbness flood her and fleetingly wondered just what the stud cream had done to Jonathan's come and if it would transfer to her.
"Tell me," Lilly begged. She was saying everything she knew he wanted to hear; now she needed him to say the things she needed. She reached a hand down to feel her brother's cock. It was so thick she couldn't wrap her fingers fully around it. The heat emanating off it was so immense it shocked her. It was so hot and hard. So much more real than any of the videos she'd watched. “Tell me.” Her tone was insistent and demanding. Jonathan was stronger than her by far, but she was still in control.
Jonathan blinked back into himself, and finally a bit of her brother rose to the surface to control the cock that owned his body. He looked down at her thin, fit, young body; at her so-hard nipples standing up on her small, teenaged breasts; down the flat plane of her smooth stomach to the hallowed entrance of her hymen-sealed, virgin-pink halls, and beyond that to his veiny battering ram yearning to break in. "I need it." He wet his lips. "Oh, God. You're so small, so tight... L-Lilly..."
"I'm only fourteen," she whispered, encouragingly. "Younger and smaller than you've ever had." She stroked his cock with her little hand. "Tighter than the tightest virgin you've ever dreamed of fucking."
His cock helplessly pushed into her wet slit again, throbbing and desperate and Lilly felt the aching emptiness growing inside her faster and deeper than ever before. And yet still her brother's massive cock head was denied entrance.
"I won't fit," he cried in desperation.
"It will," Lilly reassured him. "You'll make me take it." She stretched her legs apart even further, feeling a burn at her center from taking things too far, and loving every moment of it. "This is why you've been rubbing that cream onto your cock every night for six months. This is why you fucked that jar full of stud cream ten times in one day. So you could one day force your own sister to take this majestic, monstro--!"
Lilly's voice cut off as Jonathan spread her legs back and furiously thrust his aching cock into her virgin hole. Her hymen, still intact, held its own, but it was beginning to tear. Jonathan battered the entrance again and again. "Take it!" he screamed, overcome by arousal. "You were made for this, so take it!"
"Y-yes!" Lilly gurgled as sweet, hot pain flashed all through her. The painkillers were dulling the best of it, but she could still appreciate how much she was stretching and he was still not even inside her. "More!" She needed his words. She needed him to force her to accept her place. "Tell me more!"
Things seemed to click into place for Jonathan then, for he began speaking as he continued to ram his horse cock into his little sister's virgin pussy. "Let me in," he growled. "Let me fuck every last inch of your little virgin hole. Let me stretch you out until you break and then fill you with more. You’ve been watching me? You’ve known? All this time? Fuck… Give it to me. Give me what I need. God, fuck, a virgin cunt. My little sister. Fuck!" He roughly pulled her legs, dragging her off the pillows and flat onto her back. He manhandled her roughly, easily folding her in half so her knees were near her shoulders, her legs spread, her pussy lifted and presented above all else. At last, in this extreme position, Jonathan’s glorious, mammoth cock broke his sister’s hymen; shredded it with one good, hard slam and forever opened the incestuous forbidden chasm of emptiness beyond.
"Yes!" Lilly gurgled through the sweet searing pain. "M-more!"
Once his cock tasted the heat of his sister's hot wet opening, Jonathan scrunched up his body to get more leverage, using his weight and height to his advantage, channeling all of his mass into his cock. "Open!" he commanded. "Open for your brother!"
Lilly screamed in delight. Though she had yet to experience sexual pleasure yet, her arousal at what was to come put her through the roof. Reaching between them, she spread her own pussy lips open, stretching herself even beyond what Jonathan had. "T-take it!" Tears sprung to her eyes. She was already so close. As the huge, bulbous head of her brother’s hulk-cock slammed into her tight, virgin pussy again and again, she focused on the aching emptiness inside her and fed it darkness. "F-fuck my little pussy hole! S-stretch me out! Force it, Jonny! Force your cock into your sister’s cunt!"
Jonathan roared, feral and possessive, and redoubled his efforts, slamming his cock into her unyielding entrance and feeling none of the bruising it was causing. "Let me in!" he screamed. His hands forced her already spread legs even further apart, and inside Lilly felt herself splitting, opening. "Let me in!!"
Fire lanced through her as suddenly the force was stronger than the resistance. Jonathan's massive cockhead ripped through Lilly's tight pink virgin hole and finally, finally entered her empty, aching depths beyond.
Both siblings howled in orgasmic delight at the achievement.
Jonathan did not stop. With his thick cockhead through the narrow entrance, the rest of his enormous cock could follow slightly more easily, spreading his copious, oddly numbing precome through her. The fourteen-year-old girl was tight through and through, though, and he had to force his massive girth through each fleshy unyielding millimeter of her virgin canal.
With his cock head pressing and stretching out every single cell of Lilly's untouched hole, her mind overrode with aroused pleasure. Her brother was doing it. Her brother had battered himself inside her tiny, underaged, virgin cunt, forcing her to take the behemoth that the online size queens he'd dated had been unable to take. He was stretching her out with his massive dick, and Lilly was loving it. As her brother’s cock slowly, utterly forced her insides apart, his cockhead began to press firmly and unyieldingly into her spongy g-spot. Lilly felt her orgasm approaching as her brother's girth slowly stretched out every single bit of surface inside her virgin hole, including that most sensitive and precious of places.
As his cock pressed into more and more of her g-spot, the orgasm began to build inside her, boiling up from her cervix, echoing down the deepest parts of her still unyet unstretched out pussy chamber, and up into her screaming red clit. Her brother fucked his cock into his sister’s underage, virgin hole, and she began to finally orgasm from it, suddenly gripped by full body shaking.
"Y-y-yessss!" she gurgled as her orgasm grew steadily in strength as Jonathan's cock pressed down every last nerve of her g-spot. By the time he had stretched out the entire length she was full body quaking with an unending, ever-increasing orgasm. "G-God, J-Jonny!!"
Her orgasm fed her empty maw, activated the stud cream-infused precome, and made her body continue to open for her brother's use; made her virgin chamber deepen, accepting its role in the universe. Her brother would have to roughly force her to pussy swallow every last millimeter of his cock, but she was certain now that between the painkillers, whatever the stud cream was doing to her, and her own intense arousal at the thought would allow her pussy to endure it.
“Fuck, oh, fuck,” Jonathan groaned as he fucked her. “Y-you’re taking it.”
“Y-yes,” Lilly gasped, hiccupping, unable to stop her body from shuddering with orgasms. She still felt the searing pain of being so utterly folded and stretched, but the painkillers, magic of the stud cream precome, and orgasms made it all worth it. Her little, tight, underage, virgin cunt was housing her brother’s behemoth cock when no other woman could.
She could actually feel her brother’s huge, hot length inside her. She could see her abdomen bulging with it.
Desperate to feel his balls, she reached down to where they joined again. Her body wracked with another powerful orgasm when she touched the immense girth of her brother’s cock; felt it thrusting in and out of her tiny, tight cunt. He was slicked with their copious aroused juices, and she couldn’t begin to wrap her hand around his shaft.
She felt again for his balls; wanted to feel them slap her ass; wanted to feel her brother bury his full length inside of her, but she couldn’t find them. She felt and felt, stretching her little hand until she gave up. She felt the head of her brother’s cock opening her virgin depths millimeter by millimeter, filling her untouched virgin canal deeper with each thrust until he was knocking at her cervix, but she didn’t feel the slap of his balls.
As if reading his sister’s mind, Jonathan thrust as deep into as he could and hotly whispered, “You’re not even taking half of me.”
His cock had bottomed out inside her narrow, tight virgin cunt; stretched her as far as she could stretch, and more, and yet half his massive length was still outside her little pussy.
Her body writhed in uncontrollable orgasms at the knowledge, helplessly aroused, utterly turned on by the reality that her little body was taking her brother as deep as she could, and still half of him was unable to fit inside her.
“You’re so big,” she chanted. “So big.” She felt his cock stiffening, pulsing with pleasure at her words. “Too big,” she crooned. “Your c-cock is t-too big!”
His already enormous, stiff, rigid cock expanded inside her all at once as Jonathan roared into an unexpected orgasm. Her brother’s thick, stud cream-infused come spurted into her full-force like water from a firehose. Jonathan bucked and thrust as his sudden, immense orgasm crashed into him, attempting to drive himself deeper and deeper into his sister. She was already stretched beyond possibility, and his come gushed out of her with each squelching thrust, her little body unable to contain so much cock as well as come.
Jonathan violently came and came inside his little sister, each thrust of his enormous cock through her flooded, tight velvet folds sending another electric wave of pleasure through him. Lilly came non-stop through it all, her own stretched-out little cunt pulsing and vibrating ceaselessly, milking her brother’s cock dry of every last, pent-up spurt of come.
“F-fuck. F-fuckkkk,” Jonathan grunted as he finished inside his sister. He looked down at his cock pulsing, it’s enormous length half-buried inside her reddened, swollen tight cunt. He shuddered with another spurt of magical, transformative come, eyes crossing as if seeing spots of blackness in his vision. “Ohhh, fuck, Lil…”
“Jonny,” she crooned, her voice raw and shredded from orgasmic screaming. Even now, with his cock still thrust inside her, she was coming. It wasn’t as intensely as before, but being so stretched out made her come; she couldn’t stop. “J-Jonny. My b-brother. M-my big b-brother…”
“Fuck,” he gasped again. His cock was spent, but her words kept making his cock twitch with arousal. He began to slowly pull himself free of her pulsing, warm, impossibly tight cunt. “You’re so tight.”
“You’re so big,” she echoed, reaching up to cup his face lovingly with her soft hand. “So big and… you’re inside me…”
Jonathan grunted deeply as he pulled his cock out. "I can feel every ridge and fold in your stretched out cunt. I can feel the very beat of your heart through your cunt you're so stretched out." He sat back on his heels as, at last, he worked the fat head of his cock free of her gripping pussy lips.
He broke free with an actual popping sound, and copious amounts of trapped come gushed out of her wrecked, reddened pussy hole.
Hot tears sprang to Lilly’s eyes the moment the cold air rushed into her now gaping pussy maw. She felt utterly bereft and empty. Her little girl cunt clenched at the air, aching for the cock to return and fill her.
“Ohhh.” She was still folded in half, her back curved painfully, her ass and exposed cunt in the air, her legs bent. Come poured down her back, in rivulets through her ass crack. She felt absolutely, decadently exposed to her brother, filthy and used, and more beautiful than she’d ever felt in her entire life. Her soul ached for his cock. Her cunt thrummed for him. Her bruised cervix absolutely ached for his abuse. Her parched womb greedily drank her brother's come and, stimulated by the stud cream, magically opened for more.
She became aware of Jonathan looking at her; examining her the way she felt she was examining herself. His eyes were on her fucked-reddened cunt, her nearly bald pussy mound that was now so swollen from his abuse. She couldn’t see the gaping maw his behemoth cock had made of her previously-virgin, hymen-hidden cunt hole, but she could feel herself gaping and huge. She could tell his gaze was drawn inward; imagined that he could see her swollen, bruised cervix drowning in his come.
“Jonny,” she whispered.
At long last, he looked at her; stared into his sister’s eyes.
“Thank you,” she whispered.
The energy went out of him in that moment. He let her down, unfolding her, and collapsed in a pile of limbs and sweat on the mattress beside her.
“I can’t believe you did that,” he finally said, still breathing hard.
“I can’t believe I waited so long.” She shifted now that she was flat again, curling toward him, sealing up the aching, empty maw between her legs. “I’ve wanted to for months and months.”
His eyes were cool and collected on her. The blindness lust had given him was gone now. His thoughts were tired but rational again. “I should be embarrassed or ashamed or angry, but… instead I’m just… amazed.”
Lilly smiled brightly. She was exhausted, but so, so happy. “I’m amazed too. It was so good, Jonny. So good. I knew it would be.”
He reached out and touched her hair, tucking a wayward strand behind her ear. He was simply staring in awe at her. “You’re impossible.”
His touch felt so good, so grounding. She closed her eyes and leaned into his hand. “I was meant for it. I knew it as soon as I saw you.” She opened her eyes, fixing her gaze on his, holding him there. “You’re not mad?”
“Mad?” He almost laughed. “How could I be? Lilly, that was… the best sex I’ve ever, ever had.”
She positively glowed. “Even though you couldn’t get all the way in?”
He nodded. “Even though I couldn’t get all the way in.”
Her body hummed with arousal; the maw inside her, though sealed closed by her legs, grew, enhanced by the stud cream soaked come that had seeped into her womb. “I want to,” she whispered.
Jonathan just stared at her, not speaking.
Her gaze darted back and forth, reading the expression on his face. “I want to take it all. Next time.”
“Lilly…”
“I know I can. I know I can.”
His fingers stroked her cheek. “You don’t have to.”
“I want to. I need to.” She put her hand over his. “And you want to, too. Don’t you? To actually push it all inside me?”
“Yes,” he breathed. “But it might not be possible.”
“It will. I know it will, Jonny. I can feel my body aching for it. I promise I’ll do it. If not next time then eventually. I’ll house your whole cock inside my little cunt.”
“When did you become such a filthy little girl?” he teased.
She smiled joyfully at his praise. “Ever since I started watching you masturbating and growing your cock. You did this to me.”
“I love it,” he said, serious and calm. “It’s everything I’ve ever wanted. I didn’t know it, but you’re everything I’ve ever wanted. My own little sister.”
Lilly sat up slightly, smiling, radiant with arousal and love for her brother. “What would Dad say if he were still alive?”
“He’d probably have a heart attack.”
“I miss him,” she said. “But I’m glad he’s gone. Except for when Uncle Bill visits, there’s no one to bother us.”
“No one to interrupt us.”
“No one to stop us.”
Lilly drew her brother close, sighing as their lips touched and they kissed for the pleasure and perverseness of it, not because arousal demanded it. They kissed because they were falling in love.