This is a commission story
Disclaimer: this story is intended for adults, so if you are underage or easily offended then stop reading now as it may warp your fragile little mind. This story contains sex, featuring; weight gain, butt expansion, breast expansion, lip expansion, male penis growth and popping.
Sam sits staring in awe at her boyfriends porn collection on his laptop, she hadn’t intended finding it when she borrowed his laptop to do some online shopping, but when she found a minimised window and opened it up she was shocked to say the least. Sam had known Nick liked curvy women, but that he was also into expansion fetish stuff was news to her.
Needless to say she confronted him with it when he got home; not wanting to fight Nick owns up and tells her all about it. How he really loves huge massively over inflated women with giant tits and asses. Sam can’t help but feel very self-conscious about her own figure and how plain she is; she’s trim and athletically fit, but on the skinny side with a small butt and B cup boobs.
Getting upset she lashes out a remark of ‘why doesn’t he just dump her and find a bigger women?’, Nick hugs her close and reassures her that there is no other women for him but her. Then with a glace to his bag he hints that there may be a solution if she’s up for it, giving him a curious look Sam lets him continue, Nick retrieves a bottle of unmarked pills from his bag and tells her that they are a new body enhancement drug for men and women. Now intrigued Sam looks closer as Nick tells that they are on trail and he has signed up as a tester for the company. Further more these pills are the male version and will give him bigger genitals and that his cum will make her grow too.
Sam is strangely turned on by this as she has a long held desire to be with a guy that’s hung like a horse. So in rapid time they make their way to the bedroom and Nick takes one of the tablets. It takes a few minutes before the pill starts to work and to two are into their heavy petting when Nick feels his balls expanding.
They look down and watch as his testicles swell to the size on tennis balls, then they gasp as his 8 inch boner hardens even stiffer and expands to 11 inches long. They are both so turned on that they have the hardest, fastest sex of their relationship, but when Nick blows his load into her, Sam is rapidly aware of how much cum he’s now shooting; with each of his thrusts it feels like he is actually pumping her up. After fucking until she is exhausted Sam falls back onto the bed beside Nick, their bodies sweaty and glistening, but before they can even kiss one more time they both fall deeply asleep.
Next morning Sam wakes first and heads to the bathroom to wash and wake up. She has to walk bowlegged from the ploughing Nick had given her, but in the bathroom she is met by a pleasant surprise in the mirror. As she looks at herself Sam’s eyes soon see that her butt is a bit bigger than it normally is, the scales confirm that she has gained 5 pounds in weight. Studying her body closely now Sam finds that her butt, thighs, boobs and lips are all bigger, though its her butt and thighs that have gained the most.
Running back into the bedroom she wakes Nick and shows him her changes, realising that she’s right Nick is pleased. So much so that he gets hard again, but he is disappointed to find that his cock and balls have returned to their normal size. Sam grins and hands him another pills, Nick takes it and for the rest of the morning they have wild sex again and again and again.
With each round of sex Nick fills her up with more and more cum, and Sam can feel her skin getting tighter around her butt, thighs and breasts as her body grows fuller and rounder and she loves it.
Getting dressed later that afternoon Sam is delighted to find that her clothes are tight, she even has to change the pants she was intending to wear as they are too small to fit over her widened hips. Strutting around the house she shows off her new figure for Nick who can’t take his eyes off her. Sam now has the beginnings of a bubble butt, tight and pert in her favourite pair of yoga pants. Sam loves how her new body jiggles and bounces, even her carves are fuller and go well with her expanded thighs and now 31 inch butt.
It’s been a week since Nick started the pill trail and Sam is enjoying the results she’s getting from it, as she looks at herself in the full length mirror she studies how her body has grown bigger after each of their epic love making sessions. Currently she is stretching out her tiger print onesie: her butt, thighs and carves have doubled in girth from what she used to be, give her a 46” booty and pretty big thick thighs. And her boobs have swelled up to DD cups while her lips have rounded up in fullness to almost plump. All in all she has quite the hourglass figure coming on.
Nick meanwhile has gained some permanent increase to his cock and balls as they now only return to 10” long and his balls stay tennis ball sized. Sam is so hot for him all the time and Nick can barely keep off her too, they haven’t gone out for a night since the first pill and they have no intension of doing so.
Sam can’t get over how good it feels to fill out her clothes; having them stretch around her curves and feeling them creak and groan as she bends over. She’s had to chuck a whole bunch of her clothes away as her butt is now too big to fit into them, leaving her with mostly yoga pants and her once baggy, but no more, onesie outfits.
Recalling her first wardrobe malfunction Sam has to smile: it was the second day after the first pill and she had bent down to pick up a fallen bra out of her closet and her tight jeans burst right up the back seem. It sent a wave of pleasure up her body as every fibre of the material tore apart, exposing her fuller cheeks to the air; Sam had grown aroused and gone to find Nick immediately. It was that point that she knew that she wanted more, to be bigger and become Nick’s fantasy woman.
As she sits in the living-room watching TV and waiting for Nick to come home Sam is waiting for the sensation to start again. As for the pass few days she has suddenly had a hot flush, and then felt her clothes suddenly tighten around her, she was growing without sex. The wave of heat washed up her body and Sam lay back on the sofa to enjoy the next part. With an audible creak from her outfit Sam bit her lip in pleasure as she watched and felt her ass and thighs begin to expand slowly, the stretching material over her inflating ass was orgasmic and Sam had to let out a passionate moan of delight. She gained a few more inches to her backside, giving her a true bulbous booty, and her thighs pushed the legs of her outfit to bursting point. The flush passed her ass and rose to her chest where her DD cups swelled to EE cups in mere seconds, her nipples were on fire and she longer to have Nick fondle them again. As the heat passed beyond her head Sam lay there pleasuring herself for what felt like hours before she got up, making her onesie ride up tighter, and open the door to Nick.
Week two and Sam is now seriously big; her ass and thighs have almost doubled again, giving her a huge booty shelf of 83 inches, thunder thighs to match and carves so round that they look inflated. While her tits have swelled to fully round HHH cups (the size of her head) and her lips look like they have been overfilled with collagen. Despite the fact that she has doubled in weight Sam is ecstatic with her figure, there is not a sign of cellulite or fat rolls, it is like she has just gently inflated in size, rounding out her curves and filling out like a sexy human hourglass balloon. Her skin is smooth and taught, like rubber, and whatever clothes she manages to squeeze into look like a second skin on her. Down to her last few XXXL yoga pants, low-cut tank tops and her very last XXL onesie, Sam is very proud of her new extreme hourglass figure and spends her days, while Nick is away, walking around the house and enjoying the size of her new body. Her huge heavy jelly ass is almost constantly jiggling as she moves; Nick can’t keep his hands off it when ever they are together.
But one thing has Sam bummed out and that is the fact that her growth has platitude. She can’t believe it, just as she was really getting into Nick’s expansion fetish and making it hers too, and she stops growing. Checking herself again in the large mirror and on the scales she reconfirms that she has not gained a pound or gotten any visibly bigger since the previous morning, panicking a little she wonders what Nick will say, she doesn’t want to disappoint him and let him down, not when their relationship is at the greatest point it’s ever been.
Squeezing her butt through the door frame into the living room she sits down on the sofa; her huge ass taking up most of it as her thick thighs force her legs apart, and thinks about what’s wrong. Had they missed a pill? No. Had they changed their love making? No. Had anything changed to explain why she had stopped growing?... No, not to her knowledge.
Then Sam recalled a time when she was going through puberty; she used to take a regular headache tablet every other day, but after a while she had to take one everyday and then it was two a day, before the end. Sam knew what it was, her body wasn’t growing anymore because she had gotten too used to the drug and she need more than before to make her start growing again. Sam made her plan for tonight; just before Nick got home she ground up three pills into his coffee and as he came in she handed it to him.
Nick took the coffee eagerly as his eyes lit up as he gazed upon her vast curves; Sam smiled as she saw him growing hard for her. Then Nick took another pill out of the bottle and downed it with the rest of his coffee, Sam’s smile grew wider as she waited to see the combined results of four tablets on her lover. No sooner than he had drained his mug, the pills kicked in. Nick felt a rush to his groin like never before and Sam gasped as she watched his balls burst open the front of his pants, their gazed in wonder as Nick’s balls swelled bigger and bigger every second until they were each the size of basketballs. Nick was in shock and Sam was in a state of pure lust for her stud of a man. Then his manhood started to expand, growing from 12 inches it throbbed and swelled up to 18 inches long and as thick as his arm.
Sam tore her eyes away from his huge cock for a second to explain, but she found Nick’s expression was glazed over with sexual lust and before she could get a word out Nick grabbed her, spun her around facing the sofa and rammed his giant cock into her ass, punching straight through the material of her XXXL yoga pants.
Gasping in delight at how big he felt inside her, Sam’s ass took the biggest pounding it would ever encounter. Then as Sam was just getting into it Nick blew his load, Sam cried out as her ass actually expanded a few inches from all his seed inside her, and he keep cuming; His giant balls bouncing against her huge ass cheeks and thighs. Sam panted; tongue out, in orgasmic overload as Nick took her again and again in the living-room; he was on an uncontrolled high and pumping her like a machine. 15 minutes later Nick had collapsed to the floor, spent and exhausted. Sam tried to gather her breath and stand upright but her ass, knees and legs were weak and wobbly, so she waited there still bent of the sofa.
Then she felt the sensation of growth return; with growing excitement she giggled to herself as she felt the expansion begin. The tingling filled her whole body this time and it sent Sam in a bout of multiple orgasms like never before. With each wave of pleasure Sam’s lips, breasts, buttocks, thighs and carves expanded rapidly. Nick watched from the floor as Sam ballooned up: her lips swelled to cartoon sized cock pillows, her boobs inflated to the size of large beach balls; getting a few stretch marks around the point that they joined her chest. While her carves and thighs doubled it girth again; making each thigh 3 foot thick and her carves a foot across. But her ass stole the show; filling like a jelly balloon it passed all comparative sizes as it blow out her yoga pants as it passed five feet wide, showing Nick growing stretch marks on her skin as it continued on until it was seven feet across; each tight skinned cheek and jiggling globe three and a half foot across.
Sam recovered first before Nick got to his feet and she gazed in wonder at her vast figure; she was now naked, having burst all her clothes and she knew nothing she had would ever fit her again. But her cared not for clothes anymore, her giant hourglass figure was all encapsulating to her; its huge heavy buttocks and boobs moved and wobbled constantly just from her breathing, while her tight skin made her feel like a human balloon. She ran her hands over the faint stretch marks on her boobs and purred aloud. Then she felt Nick’s erect manhood bounce between her breast cleavage as he came into her sight line, Sam was satisfied but Nick had that glazed expression back and she knew what that meant.
She made to push him off so she could rest a moment and take on all her new body, but Nick pushed her first; landing her on her giant ass and rolling her back so he could get his huge cock into her wet sex. Sam gasped at Nick’s roughness but couldn’t stop him, she had created a beast and now she had to live with it. Having him inside her pussy felt even bigger than in her ass and just like before Nick burst his huge load before Sam was even close, she could feel his giant balls pumping against her butt as he filled her several times more. When he was done Sam could only lay there on her back as he fell to the sofa spent again.
The tingling started and Sam felt the growth begin as she fell into her own orgasmic haze. Nick watch Sam expand in the middle of the room, which she soon filled and started to force the furniture apart. Her expanding body began to fill the room from wall to wall; she was getting truly gigantic as her skin grew shinny with many more prominent stretch marks appearing across her boobs, butt and thighs.
Her growth ended only once she had almost filled the space, Nick was pinned in one corner near her head and Sam was stuck fast. She came out of her haze to the sensation of incredible tightness; both from the constriction of the room’s wall and of her overstretch skin. She tried to speak but her over inflated lips let her only mumble nonsense and Nick was so turned on he couldn’t understand her.
Sam could do nothing as she watched Nick beat himself off to her vastness and a desperate attempt to relieve the re-growing pressure in his swelling balls; as jet after jet of thick jizz landed over her face, shoulders and chest Sam was starting to think she may have taken this too far.
At that point she feels a hot flush building within her, she knows it will make her even bigger, but she is so tight that she can’t take anymore, what will happen if her skin can’t stretch to take it, then she knows what will happen; she pop, no at this size she’ll explode. The hot flush hits and Sam’s body starts to expand again, desperately she tries to call for Nick to help somehow, but only mumbles incoherent bloated lips smacks as she grow bigger and bigger.
Nick is getting off on her secondary expansion and is totally unaware how scared she is getting as he continues to jerk off. But Sam is now freaking out madly as her internal pressure is mounting; she can feel her skin vibrating under tension and the stretch marks cover her whole body, but still her lips, breasts, thighs, carves and gigantic ass expand further. Soon she can hear what sounds like humming rubber, like an overfilled balloon and she knows it’s her. One last time she tries to call for Nick, but as she looks down at him he blows his latest load landing it right in her face. Sam gasps, sucking in air and jizz, she hears a small click; the final straw is broken.