Chapter Text
Small glass chambers filled with vestigial fluid bubble with oxygen rich gases. The room is dark and spacious with only the dull green glow emanating from the glass chambers to give light.
There is a woman standing at one of the large tables in the middle of the room. She is looking into an electron microscope that sits next to a powerful computer.
She holds an intimidating physique at six feet and three inches tall. She wears an open lab-coat that allows one to see that she wears little else. The middle of her naked chest could be plainly seen, or rather what little of it was visible underneath her large H-cup breasts. Only a hint of her nipples to be seen as she calmly breathed while observing the specimen. Her stance stable and relaxed as she wore a pair of black stockings with soft padding in their soles.
One would think that her attire was wildly inappropriate for a lab setting. This thought would strike as distressingly obvious as she proceeded to casually scratch her short black pubic hairs, her white soft pelvis completely open to the air.
Her dark-eyed gaze was focused as she used a sharp nailed hand to brush her equally sharp bob-cut with ends that ended underneath her chin. Her full lips moved side to side in thought. Her wide and muscular hips swayed side to side as she considered the specimen’s potential.
Her name was Jenna, and she worked in genetic engineering.
Her current work was focused on correctly sequencing the right proteins to grow a second pair of arms on humanoid subjects. Similar musculature, but its placement would require it to be of a different size. These considerations were difficult already without taking bone structure into account. How it would connect to the vertebrae would be key to its-
Suddenly a loud pained moan interrupts her from her task at the computer. She asks herself what could that possibly be.
She walks upstairs inside her pleasant cement house in a warm summer day and hears that pained moan again on the other side of her son’s bedroom door. She recalls how easier it would be to stay working on her projects if her husband were still alive. A shame that he died trying to fuck a mare to death testing an extremely experimental and potent aphrodisiac. He had gone on for hours and ejaculated gallons into its womb. Didn’t help that he had a dick that could put a stallion to shame. On the bright side the mare had survived and gave birth to triplets. The chance to use experimental gene therapy to give the mare’s tissue sufficient elasticity for the birth had been quite the hidden boon.
She opened the door and found her son holding onto his fat, throbbing tool. He was breathing heavy with sweat on his brow as he held onto his cock not sure what to do with it. He just knew that it hurt from how engorged it was.
Jenna felt herself get wet at the sight as she breathed in those familiar hormones and took note that her son had the same length and thickness of his late father. Talk about a growth spurt!
She casually walked in, her eyes in a trance. Her son said something, a sound of surprise, but it didn’t matter. Immediately she started licking off the streams of precum from his hot dick, enjoying the feeling of veins and urethra. Suddenly she found herself taking in her son’s glans into her mouth, gulping down globs of precum straight from the tap.
Eventually she stopped and took note of her surroundings, noticing that time had sped past and wondering when she had begun giving her baby boy a boob-job. He was still groaning from pain and it seemed he was unable to climax despite the extra stimulus.
Seizing back control of herself, she realizes that her boy needs a proper pussy to empty his balls into, but she couldn’t give him hers without some preparation beforehand. Her mother and father were twins after all, and as a scientist she knows better than to roll the dice more than once when it came to deleterious genes.
Or rather, if she was going to begin a project on the reduction of susceptibility to deleterious genetic heritages in incestual pairings, she needed another ginny pig. What better than her hopeless, and man hungry deadbeat sister?
She mostly let her stay with them because she occasionally did chores around the house and got the groceries. Also, because she really couldn’t care less about what she did. Her little sister had always been a sprout that had never managed to grow in the shadow of her immense intellect.
At the very least, Linn did seem to love her son Harry VERY much. She always did think that her sister took every opportunity to shower her son with love and affection. Wet kisses and some very long and inappropriately tight hugs. Almost as if she was trying to be HIS mother.
Casually, she considered her apparently neglected child as she gave his foot-long prick a slow and punishingly tight boob-job. She listened to the loud shlicking sounds as a heavy flow of precum kept oozing out and pooling on top and into the crevice of her breasts.
“Do you love aunty Linn?” Jenna asked almost casually, but with a hint of silent danger in it.
“Huh? M-Mommy Linn?...”
Well…that answers that.
She told him to call her that? She told him to call her mommy?!
With a cold glare she picked up her trembling wreck of a son.
“Mommy…?”
She had him in a bridal carry with his cock sticking out from between her fat tits and occasionally his tip would bump and smear her mouth with precum as they made their way through the sturdy home.
They went down the hallway and opened the door at the end of it where she found her sister in her usual summer dress but face-down on her knees in her bed with her white panties looped around one thigh. Her naked rear was facing the door and she could see her sister was wearing earpods and had her eyes closed, which meant she was completely unaware of their entrance.
It would be a very curious position to find her in, if it wasn’t for the three fingers she was shoving into her cunt. She was in a trance, and it looked like she wouldn’t be getting out of it soon.
Jenna changed the grip she had on Harry, her arms wrapped around his chest under his shoulders. The fact that it left Harry’s head firmly between the valley of Jenna’s huge tits, causing Harry to throb in excitement, was pure coincidence.
“Look Harry. “Mommy” Linn needs your help right now.” Jenna purred with a wicked smile.
“She does?” Harry asked, unsure of what his aunt was doing, but strangely mesmerized by the sight and smell of her wet delta.
“Yes,” Jenna slyly replied as she slowly got on the bed and measured the distance between throbbing tool and gushing cunt. “she’s in pain just like you, dear. Thankfully, you can both help each other, and I’m sure there is nothing more that dear “Mommy” Linn would want than to help you feel better.”
Shuffling into position on her knees Jenna readies her fucktoy for a son behind Linn on the mattress.
With a thrust of her hips she shoves half her son’s scalding hot tool into her own sister’s swollen red pussy.
Jenna had felt the sheer resistance her sister’s pussy had put it during that harsh and violent thrust inside. Linn’s cunt had been spread open and all she could do was scream soundlessly from the pain and sheer flood of sensation that Harry’s tool had rammed into her. He was only half-way in.
Jenna shuffled closer to Linn and with little fanfare thrusted Harry the rest of the way into his loving aunt’s hot insides. A loud yelp escaped from Linn then.
Harry was just as overwhelmed as his aunt in that he could barely let out a groan of pleasure as his aunt’s folds assaulted his throbbing prick greedily. He would’ve already came if it wasn’t for how painfully erect he was.
“How do you like that Linn?” Jenna gloated with a shark’s smile as she heard her sister groan pitifully while she used Harry to make short, but quick thrusts in and out of Linn’s leaking pussy.
Harry was gasping and trembling as his mother kept forcing him to rape his aunt. He kept trying to stop or slow down the pace at which his mother was forcing him onto her, but she was too strong and his huge balls kept slapping against his aunt’s hairy crotch as he kept being thrusted into her balls deep.
His aunt was so warm and hot. On all sides Harry was surrounded by soft and feverish flesh. He was quickly being covered in sweat and his crotch covered in sexual fluids as the forced rape session went on.
Linn’s entrance was hot, swollen, red, and wet. Her groans started to become moans and she started to press herself against Harry.
Jenna, of course, took note of it and began to take longer and harder thrusts by pulling out to almost his tip and then slamming it all the way back in again.
An hour later, Harry was delirious after what felt like an eternity being used as a living dildo.
Every thrust he was knocking against her womb and every pull felt like her cervix was stubbornly sticking to his tip like it was trying to suck the life out of him.
Aunt Linn’s entrance was tight as a vice as it wriggled, undulated, and spasmed all over her nephew’s engorged cock.
His head was still stuck between his mother’s breast as they jiggled at the end of every harsh thrust. They rubbed the cheeks of his face as his crotch slammed together with his aunt’s.
His hands lied there uselessly on his aunt’s undulating and sweaty butt. Every time he tried to brace himself his hands would just helplessly slip along its curve as his mom forced him into another thrust from behind.
Jenna, on the other hand was holding onto Linn’s hips with little problem. She couldn’t let her sister simply fall flat and escape her just fucking, now could she?
Jenna was having loads of fun hearing her sister moan like a desperate whore and her son mewling for mercy and begging her to slow down. She, of course, didn’t heed him and forced him to thrust that much harder.
Harry could finally feel it. His balls loudly churning and the pressure in his groin reaching a breaking point as his aunt moaned in ecstasy for the dozenth time.
He could feel it ready to burst out of his groin and into the pulsating, heated folds of his aunt as she continued to rub the fat bulge that he left on her stomach every time he was hilted into her. She was mesmerized and massaged the tip of his dick with more and more intensity as she felt his climax approach.
Jenna, feeling the pitch in Harry’s breathing change, knew what was coming and hilted Harry into his aunt one last time. She even grinded Harry’s crotch into her sister’s for good measure.
Harry’s violent ejaculation almost caused him to black out as he experienced total ecstasy and relief. His glue thick and copious cum splurted noisily into his aunt’s sucking womb. It came out with such force that a loud SPLAT was heard when his cum impacted with the far wall of her womb.
Aunt Linn shrieked in ecstasy as her desire, her need, for breeding was finally met in the most perverse and violent manner possible.
Jenna firmly held Harry’s groin flush with her sister’s as the bulge in her stomach slowly filled with more and more gloppy semen. Loud splurts were heard from Linn’s insides for a good minute as Harry just kept trying to empty his ever replenishing reserve of cum.
Once her sister looked like she was pregnant with overly obese twins Jenna simply moved herself back and away from Harry.
Harry, not having much mass to him as an eight year old boy, found himself being pushed back by his aunt’s greedy back side, but with nothing and no one to support him from behind.
He fell back while still balls deep inside his aunt. He ended up trapped underneath his aunt as she sat on his crotch on the bed while she was still experiencing concurrent orgasms from the last two hours of constant rape. All Harry could see was his aunt’s shapely rear, her back, and the sides of her inflated womb.
Harry’s member had only softened enough to not be painful anymore, but was still more than hard enough to stay stubbornly lodged in the still writhing depths of his aunt’s convulsing vagina.
Jenna walked around the bed and admired her hard work. She had barely broken a sweat, but her sister was nearly catatonic from the strain and pleasure she was going through. Her mouth lazily open and her eyes glazed over. Aunt Linn was in a whole other world and she may never come back the same.
Jenna rubbed Linn’s cumflated belly and leaned her face next to her sister’s ears.
“Make sure to empty him every day like a good ‘mommy’” Jenna rubbed the spot on Linn’s swollen womb that was right above Harry’s swollen tip and slowly increased the pressure on it more and more as she looked Linn in the eyes with a smug smile.
Suddenly Harry moaned as he came again from the rough stimulus to his glans and came a second time into his aunt’s overly stuffed womb.
It was the final straw as aunt Linn gave a loud gasp and promptly lost consciousness becoming nothing more than her nephew’s personal cock-sheath fuck-toy as her cum bulge swelled further.
Harry, stuck under his aunt’s heavy buns with his never-softening cock equally stuck inside her, kept trying to get her off of him. He tried to get his hands underneath her for leverage but her weight was too much and his arms too weak to get his hands underneath her plump tush.
Harry tried to get his aunt awake by beating at her back or pulling at her long hair, but nothing worked for aunt Linn was completely unconscious and lost in a pleasure coma.
His mother Jenna walked by on her way out of Linn’s room.
“Mom, please! Help me!” Harry begged, not wanting to lose his mind to the pleasure as his aunt’s vagina kept convulsing all over his prick so roughly that it felt like he was thrusting full force into her every second despite staying balls deep in her warmth.
“Hm? I’m sorry dear. I thought aunt Linn was your mommy now?” She said as she looked over her shoulder with sadistic glee.
Harry gaped in dismay.
“Don’t worry deary.” She said with a close eyed smile. “I’ll have the maid droid come up with water and food every now and then.”
Harry felt his aunt’s pussy pick up in its contractions as his mother made her way out the room and closed the door behind her as she left him to his fate to cum his brains out inside his unconscious, but caring aunt.
He hoped his aunt would wake up soon as he began to lose consciousness as he felt his third ejaculation surge its way up and out his cock and explode inside his aunt’s womb. The disgusting gurgling noises that followed faded away as Harry finally joined his aunty in dreamland.