Detention
Mr Adams sat in his biology classroom, waiting. The school day had ended a while ago, and he was waiting for one of his students to turn up for detention.
The student was Leah, 15 years old, and one of the most popular girls in school — and there was a reason why. Though at such a young age, the girl was already overdeveloped. Her breasts and hips would not have looked out of place on a fully grown woman, and their size was only enhanced by her short 5-foot-tall stature. On top of this, she was remarkably beautiful.
Truly, she had won the genetic lottery, and the man had had an eye on her for a while. This past year had been incredible, watching her body fill out even more, and as a biologist, it was particularly intriguing.
Tuesday's class was on reproduction and pregnancy, and Mr Adams was discussing how younger creatures often have less-developed babies and complications during gestation.
As he gave the example of teenagers having more risky pregnancies, Leah scoffed loudly and made comments about how "girls like that are sluts anyway" and "it's what they deserve".
This wasn't the first time she had interrupted in class, and the teacher decided it was time to punish her snarky remarks by giving her a detention. The only day he had available was Friday (today), though as it turned out Leah had netball team practice straight after school. To accommodate this, he had to push the detention to later than usual, when the school was empty aside from a few cleaners.
Unknown to the students, Mr Adams concealed a wealth of knowledge as an exceptionally clever biologist, with advanced degrees and a broad understanding of adjacent scientific disciplines.
Passionate about his work, he found particular joy in teaching. Introducing students to the wonders of biology and potentially shaping the next generation of scientific talent fueled his motivation. To the students, he was simply a great teacher, and many credited him for sparking their newfound love for the science.
Perhaps unfortunately, the man also had a massive breeding kink. Anything to do with fertility and pregnancy drove him wild, which potentially explained his fascination with Leah.
He had been working on several projects in his free time, and the opportunity to test them out was irresistible. He had worked feverishly over the past few days to get everything finished and ready, and the "kit" was sitting in his drawer, waiting for her to appear.
Eventually, there was a knock at the door, and in walked Leah. He instructed her to sit down, which she did. She had changed out of the netball outfit, but not back into her school uniform.
Instead, the girl wore running shorts that hugged her curvy ass, and a tank top that exposed far too much cleavage. She knew it too.
When she reached the desk and chair he had placed in front of his, facing him, she bent over much more than was necessary, sticking her ass out and exposing her tits as she sat down seductively.
When she looked back up, as Mr Adams began to explain the detention, she looked deep into his eyes as she tossed her hair to the side, then gathered it and began tying it up behind her head.
The man knew exactly what Leah was trying to do. She thought less of him, and was trying to use her body to seduce him and make her punishment lesser. It wasn't going to work.
Mr Adams stood up and walked around his desk until he stood in front of her. After a brief pause, he smacked her hard across the face before swiftly grabbing the ball gag from his back pocket and strapping it to her.
The girl didn't even have time to process it before it was done. Her protests were muffled as she began to panic, reaching behind her head only to discover the contraption was padlocked.
Mr Adams had meanwhile walked over to the classroom door and locked it. The girl frantically searched for escape, before deciding to bang on the windows instead. This was futile — the classroom wasn't on the ground floor, and besides, the windows were one-way in the daylight as an added privacy feature for the students.
It was too late in the day for anyone to notice her anyway. Nonetheless, noticing an open section of window (that she could stick her hands out of to wave for help), Leah began to rush toward it. Being solely focused on this left her oblivious to Mr Adams, who had by now walked over, and whose arms stopped her in her tracks.
The teacher forced the teen to bend over his desk, and he held her down with one hand as the other reached into the drawer to retrieve the first injector.
The device was a modified re-purposed EpiPen, and Mr Adams swapped hands as he instead leaned his weight on Leah to hold her in place as he searched for a vein in her pinned-down arm. Finding one, he carefully plunged the auto-injector into the site, and let go of the girl once it was emptied.
Too terrified to move, Leah remained there, trembling and feeling defeated. There was no point banging on the doors — everyone had left by now and the cleaners were in the other side of the school.
"I'm not going to hurt you," said Mr Adams, "I'm just testing compounds — that's your punishment for today."
"Can I trust you not to scream if I remove this?" he said, to which she nodded, and he removed the gag.
Confused and still scared, Leah began to ask, "Compounds? What type of com-" before being startled by a sudden sensation in her hips.
Standing up, the girl looked down and gasped when she realized what was happening. Her hips were widening before her eyes! Her hands shot to her sides, and sure enough, she could feel the skin moving beneath her fingertips.
But that wasn't all. Leah could feel her bra getting curiously tight. Actually, it was getting really tight now, and when she looked down at her chest, the valley of visible cleavage only got deeper as her tits were squeezed by the pressure.
"What the fuck did you do to me?!" shouted the girl, as her heavy breathing finally caused her bra straps to snap underneath her top. Her stretched shorts were meanwhile beginning to rip.
"Accelerated puberty," came the response, "you're experiencing the next few years of development in the space of a few minutes."
The teen was too stunned to speak — surely this couldn't all be natural...and inevitable. "I'll need to give you another to make it stop," said Mr Adams, to which Leah reluctantly agreed and let him inject her once more.
This was a lie — the process would stop on its own. This new compound served two purposes: increased fertility and rapid gestation.
When her development finally stopped, Leah took a moment to compose herself before her hands began to explore her new body. She was nervous about her naked bottom half, but Mr Adams was facing away from her doing something with the kit, and she couldn't help herself.
Truthfully, the girl had always adored her body and the attention it brought, and now it was even better. To get a better look at herself, she took out her phone and propped it up, admiring herself with the front camera.
What she saw was heavenly. So young, but such a ripe figure — huge soft tits barely contained by her top and hips wider than her shoulders, with luscious thighs and a fat ass to boot.
As if in some sort of trance she bit her lip as she began to jiggle and squeeze her breasts, which had outgrown her 32F bra and would have strained a 32K!
The thought of calling for help hadn't even crossed her mind when her attention was abruptly shifted back to Mr Adams as he turned around.
Leah wasn't sure what she expected to see, but it certainly wasn't this. The man's trousers were pulled down slightly, exposing his crotch and...expanding cock and balls?! She was in utter disbelief at what she was seeing, only able to produce a dumbfounded exhale.
Yet it really was happening, and her teacher's privates continued to grow far beyond anything she had seen in porn. To top it off, as he looked at her, his penis began to get erect, only magnifying his size.
Once the growth had finished, it was an incredible sight. At least 10 inches of meat as thick as the girl's arm, with softball-sized testes.
Leah just stared at it. In fact, she couldn't stop staring it at, but not only due to its size; no, she wanted it. Conflicting thoughts filled her mind — here she was being held captive by her teacher...but look at his cock...fuck it's so big and hard and...OH GOD I NEED HIS CUM.
She couldn't stop the urges. It was strange, she only ever felt this horny and desperate when she was ovulating, but even still this was on a different level. The girl could feel her nipples getting hard and her pussy moistening.
Mr Adams had noticed this too, and as he walked towards her, Leah gulped. His rock-hard dick swung and bobbed slightly and his huge balls jiggled as he moved.
When he reached her, they stood in silence for a moment, staring into each other's eyes. His shaft pressing against her body, the man slowly ran a hand up her torso, playing with a breast. His other hand held onto her wide hip, and he could hear the girl whimpering in desperation under her breath.
Before she knew it, the horny overdeveloped teen was turned around and forced to bend over the desk, her huge tits pressing against the surface. Panic overtook her for a moment as she noticed her phone disappearing over the side.
But that emotion was quickly replaced by ones of shock and ecstasy as she felt the giant cock slowly slide into her pussy from behind. Her eyes rolled back and she moaned loudly as she felt it stretch her out.
Her pillowy butt stopped him before he was in enough to press against her cervix, though Leah was still amazed at how much she had taken without any discomfort. She really was just that unbelievably horny.
Mr Adams soon picked up the pace, and the classroom was filled with the sound of him slapping against the girl's ass as he pounded her. Leah was in heaven, tongue out and moaning so loud that she had to cover her mouth.
He eventually turned her over and started to fuck her missionary. Her tank top came off to allow him an unrestricted view of her heavy breasts as they jiggled rhythmically atop her otherwise petite torso.
Leah could feel his huge balls pressing against her with each thrust, as she struggled to contain her boobs and stop them hitting her in the face as they bounced back and forth.
Even without clitoral stimulation, she was so close to orgasm. Her mind was so clouded by pleasure that she didn't even notice the normally painful sensation of the man's shaft hitting against her cervix, his full length now unrestricted in this position.
Finally, she wailed in pure overwhelming joy as she squirted on her teacher's penis. As the orgasm wracked her body, her vagina contracted, causing Mr Adams to lose it as well, and with a final powerful thrust, he too found release, likewise throwing his head back.
His balls, which had been churning and filling up with sperm, began to empty. His last thrust had been so powerful that the head of his penis now pressed well against the girl's cervix.
Resultingly, the cum that shot forth was forced right into her uterus, and there was lots of it. The man shot semen like a firehose, and it just wouldn't stop.
Within seconds, Leah could feel her stomach begin to protrude outwards as her womb was filled and started expanding. Still reeling from orgasm, it was a surreal sensation, and the reality of being inflated like a cum balloon hadn't fully set in.
Mr Adams moaned as his balls emptied themselves into his teenage student. It was then that he noticed her stomach, so stretched with his potent semen that she looked 6 months pregnant!
Leah, still breathing heavily, looked down dumbly at her belly and hesitantly rubbed it a little, amazed at how much cum there was inside her. As Mr Adams finally pulled out slowly, she moaned.
Without his cock acting as a plug, the semen began to slowly leak out of her uterus and pussy. Regaining some composure, the girl stood up, cum gradually dripping down her thighs and legs.
She looked over at Mr Adams, who was facing away from her, fiddling with something on a shelf. The stopwatch on the shelf below was active, and when she looked harder Leah realized that the man was adjusting a small video camera!
Taken aback by this, she gasped. "D-did you film-?!..." she began before stopping, her face reflecting discomfort and unease. She looked down at her belly, which was still significantly protruded, before her hand shot to her throat and she swallowed.
Mr Adams, now finished with his tasks and facing her, had a small grin on his face. Leah's eyes went wide and she frantically looked around the room.
Hand over her mouth, she darted towards the nearest sink, slamming herself against the side of the unit as she vomited. Due to her small stature and deep positioning of the sink, the girl would have needed to stand close to the sink to bend over enough anyway.
Leah had run at the sink with such force that her squishy protruding belly was squeezed, shooting the majority of the cum inside of her womb back out of her pussy. The explosion that shot forth from between her thick thighs was remarkable to witness.
The sudden evacuation had caught her off guard, causing her to make a bizarre sound as she threw up hard into the sink. Mr Adams looked on in amusement as the teen was emptied from both ends.
She got little respite before vomiting again. Her tits were pressed against the unit and her bare plump ass stuck out invitingly as the puddle of cum formed below her.
After a couple more spews, Leah began to recover. Resting over the sink and breathing heavily, she still felt strange. She felt bloated, and like it was getting worse. Looking down, to her horror, she realized why.
Her bare tummy was not only now larger than before, but it was getting bigger! The squishy flesh was rapidly expanding, enough to where it was pressing into the counter and trying to push her backward.
Stepping back, she continued staring at it, alarmed, feeling the skin expanding under her fingertips. Her brain quickly connected the dots.
Looking at Mr Adams, her face filled with shock, she fumbled her words before finally being able to blurt out "Am I pregnant?!".
"Slut," he said mockingly, repeating her own words. This surprised her, and suddenly the situation was becoming all too real.
As she again looked down at her belly, now appearing larger than full-term, she asked "What the fuck did you do to me?!... Why is it growing so quickly?!"
Mr Adams didn't answer, he was busy rifling through a cupboard. Finding the blanket, he took it out and began to inspect it.
He only looked up when the girl deliberately cleared her throat. As her belly grew beyond the size of full-term twins, she was getting antsy. "So," she said, "how many babies did you put into me?!".
Unfortunately, her teacher wasn't sure — he was as surprised as she was at her size. The hormone injection he had given would increase egg production to where she should release four times more.
What he hadn't taken into account was the girl's abnormally high natural fertility due to the existing estrogen levels. Though none of them knew it, Leah was typically releasing two to three eggs each month instead of just one.
It didn't take him long to figure this out. She was about to get a hell of a lot bigger than he planned...
The teen was now really feeling the weight of the babies on her body as they rapidly gestated.
As she waddled — yes, she was already waddling — back over to her chair and sat down with a groan, Mr Adams finally spoke.
"It's maybe best that I don't tell you that right now" came the response to her question. This really set her off.
Perhaps it was the pregnancy mood swings, but either way, she just wouldn't shut up, her belly all the while expanding out to her knees.
Mr Adams had to keep her quiet, lest the constant noise attract attention. He swiftly repeated the maneuver from earlier, fastening the ball gag around her mouth.
Just before he did, he answered "Ten", and the horrified "WHAT?!" that was Leah's response provided the opportunity to easily put the ball in her mouth.
Her protests continued, and he could work out most of what she was saying, but at least it would be inaudible to any others now. Her disbelief at this figure was evident, though truthfully it could be more or less.
He had just guessed how many eggs she normally released and multiplied the average by four. The specifics didn't matter because she would get huge either way, and events were already well in motion...
It was an incredible and strange sight what was going on in front of him now. The teacher stood watching as his teenage student sat stark naked in the classroom chair, rubbing her tummy as it overtook her knees.
Though her look of discomfort suddenly changed to one of confusion as she stared at her belly intently. A few moments later she reacted again, and a warm smile crept over her face as she realized what was happening — the babies had begun kicking.
Combined with the expansion, it was a bit peculiar, though the girl couldn't help but feel a sudden maternal sensation wash over her. She hugged her belly full of babies; her heart full of love, her mouth still full of that ball gag.
It was at this point that she clocked her slowly swelling boobs. "Oh great, as if they're not big enough already," she thought. Her mind swiftly returned to the blissful tranquility as she felt more flutters.
Though she didn't notice, the man had now laid the blanket out on the floor, one edge positioned against the wall.
Mr Adams' cock was stiff once more from watching this spectacle, and he couldn't help himself.
Leah's tranquility was disturbed as the man positioned himself over her, his legs parted to avoid her growing belly.
The girl's posture had changed as she leaned forward slightly, adjusting to the increasing weight protruding from her. Her teacher swiftly corrected this, pushing her back by the shoulders until she leaned in the opposite direction.
The sudden motion surprised her and caused her huge tummy to rise and slap against his big balls. As gravity tried pulling the mass back down, she had to desperately use her arms and legs to support it, holding it up for comfort.
Mr Adams had meanwhile grabbed her soft breasts and began passionately titfucking her, still using his strength to force her back. The feeling of the flesh expanding beneath his fingers and around his cock was incredible.
By the time he had finished, Leah was practically begging him to stop through the gag. Her poor tummy was getting too big and too heavy for her to support.
When the man pulled away, she almost immediately "fell" forward. Still on the chair — though only just — her failing legs opened wide and allowed her belly to drop down as she leaned. Her belly button hit the floor as she sat there recovering.
As the growth only continued, it was clear to Mr Adams that she was about to fall off the chair and hurt herself. Taking action, he lifted her slightly before kicking the chair away and awkwardly moving her over to the blanket.
She was quite heavy by this point, even for him, and he didn't bother bending all the way down. Instead, she was dropped the remaining foot to the ground, her thick ass and thighs absorbing the impact.
With this, her moaning was punctuated by a sudden exhale. The movement in her belly, which had intensified as a result of the rough titfuck, only got stronger as the womb fell onto the floor with a thud.
She leaned back against the wall and groaned as Mr Adams began to move her belly and lower body onto the blanket as well. He lifted her by her belly, pivoting her sideways before dropping it down again. It was surreal feeling the babies inside roll around beneath his fingers, and this only strengthened their protesting.
The teenager was whimpering now as her growing babies overwhelmed her. She fruitlessly rubbed her overstuffed tummy in deep circles, unable to reach the vast majority of it now as it swelled to a size capable of holding a girl her age.
Her breasts, still growing slowly, became engorged and began to leak milk down her naked body. The pressure and sensation of her sensitive nipples only made things worse.
Mr Adams meanwhile was entranced by her pregnant tummy, still feeling the babies as they kicked hard and made her stretched skin ripple.
Thankfully, the elasticity compound he had given her was working, though its effectiveness was limited due to the unexpected extreme size. Faint red stretch marks painted the abdominal skin — the fact they weren't worse was miraculous.
As was the ability of her uterus to stretch this much, though that was surely close to failing by this point.
By the time the growth had stopped, Leah's belly could have comfortably fit a large adult man, and its sheer weight made her utterly immobile. Each engorged breast was the size of her head and would shoot forward a jet of milk at even the mildest pressure.
Her unborn occupants had mostly calmed down by this point, but Leah's ordeal was far from over yet. Her groans intensified as her belly went hard over and over again. She knew what this meant.
She gasped as fluid flooded from her nether regions and soaked the blanket — her water had broken. Apparently the birthing process was accelerated as well, and mere seconds later she cried out as a powerful contraction ripped through her, the clenching muscles visible beneath the taut skin.
As it happened again, Mr Adams stood back and prepared himself. His lips formed into a devious smile — he was going to enjoy this...