Untitle

Jenna was snooping around on the computer in her boyfriends room when she found a curious program labeled “MasterPC”. She double clicked it and the screen lit up with a 3d model of her exaggerated pear-shaped body and several sliders and drop down menus surrounding the virtual model. A small popup said “New user detected, continue?”

She gasped softly at the incredibly detailed little model of her rotating on the screen. She clicked through the dialog box and started poking around at the options. Sliders for things such as “breast size”, “height”, “leg length” and other physical attributes were there, as well as other options for “mental state” and “personality”

Her eyes drifted down to the change log, where previous changes such as “Brad: penis length 12 inches, muscle mass increased 50%” were listed. Her boyfriend was always well hung and hunky, and Jenna was confused on why this was typed out. She also noticed “Jenna: ass size increased 200%, hip measurement increased 200%, horniness increased 100%”

“What the hell?” She muttered, looking back at her stupid thick ass overflowing the sides of the small stool she was sitting on. “I’ve had this damn thing forever…” she said, reminiscing on overflowing school desks and having trouble with wide doors for most of her life. She adjusted her 3xl panties, turning back to the screen with a curious look on her face.

“Something ain’t quite right here.” The fat bottom girl started messing with some of the options on the screen. She moved up the breast size slider a tad, and the 3d Jenna on the screen went from small B’s up to fat G’s. Her mouse hovered over the confirm button when another notice about “retroactive changes” popped up. She clicked no, then felt a pleasurable sensation in her chest.

Startled, she looked down at her small boobs which were becoming remarkably less small. Her little tits were quickly growing into huge jugs, reaching the final G cup sized hooters in seconds, matching the little model on the screen. Even her nipples sized up to match her new rack.

“Ohhhh I get it now” she said, the curious look on her eye changing into one that was equal parts horny and devious.

-

Brad got back from the gym a little bit later that day. Working out was so much better when you changed your mind to make it enjoyable, he thought.

“Hey Jenna, I’m back” He hollered down the hall, dropping his gym bag and making his way through the house to his bedroom. When he got there he found a huge, naked Jenna taking up the majority of the bed.

“Hey babe,” She said in a flirty tone. Brad was startled by his girlfriend’s massive form. Her feet and shins were hanging off of the end of the king size mattress, her hips were easily four feet wide, and her tits were bigger than yoga balls. “I found your little program. What do you say you take these new tits for a ride? You know how worked up I get when you’re all sweaty from the gym.”

“Y- You weren’t supposed to know about that!” Brad stuttered, a little scared at his eight foot tall girlfriend.

Jenna rolled her eyes. “Figured you’d say that, I have some stuff already prepared!” She reached her long arm over to the bedside computer and hit the confirm button on MasterPC.

Brad’s brain emptied and he became unbearably horny. His foot long dick hardened nearly instantly, snaking down his shorts. Then it kept going, getting longer and thicker, pushing harder on the fabric until a two foot cock ripped out of his shorts, pointing straight at Jenna.

“Ooooh, I like that more than I thought, come here boy…” She flipped around, now sitting facing Brad. Her thick thighs were spread wide and her pussy was dripping wet.

“Wait” Brad said, fighting the fog of lust in his head. “Can I hit it from behind while I made your ass grow? That was kind of the whole point of my first changes.”

“That sounds… pretty hot actually” Jenna replied. She turned over on the bed, springs creaking as she shifted what had to be over a ton of tits and ass. Her wide hips spanned half of the width of the bed and protruded nearly a foot and a half upward. “Oh, and make me grow every time you come”

“Got it” Brad said, snapped his finger guns, and hit confirm. Instantly, Jenna’s massive ass became even more massive. Her thighs thickened to over two feet of muscle and fat each, and her hips widened to even greater sizes. Her butt doubled in size, then doubled again, the sheer mass of booty taking up two thirds of the space on the bed. The frame could take no more, and the wood snapped in half and the rest of the bed hit the floor with a house shaking thud. It took over thirty seconds for her 7 feet of ass to stop wobbling. Brad couldn’t see anything past Jenna’s massive bubble of ass, and he couldn’t be any harder.

At 9am, your wife Susan woke up. You still hadn’t written anything.

“No luck?” she said, nibbling on half of a protein bar.

“Nothing,” you said, noticing her light breakfast. “Is that all you’re eating this morning?”

“I’m on a diet,” she said, forcefully but without enthusiasm.

You stared at her ass with a sense of tragic longing as she sipped her coffee.  

Susan’s ass will get bigger you wrote.

“Mmm!” said Susan, reaching behind herself, wiggling slightly.

You looked back and forth from the screen to Susan’s butt. Did it look… bigger?

“Probably just the power of suggestion…” you said to yourself.

Susan’s ass will get BIGGER you typed.

You stared and intently. Your mouth hung up open as Susan’s pajamas tightened as her ass grew about two inches wider. She even reached behind herself to adjust the fit!

Susan’s ass will get MUCH BIGGER you typed.

Susan made an odd little groan, and put her hand behind herself, and actually pushed down on her own butt while it expanded. You heard just a bit of stitching pop.

“Huh,” she said, patting the stretched jiggly back of her pajama pants.

Her tummy made a weird growling noise.

“Oof…” she said, patting her stomach. “You know, I’m actually pretty hungry. Do we have any leftovers from last night?”

You were staring down at how tightly her pants were wrapped around her thighs.

“Honey!” she said, snapping her fingers. “My eyes are up here!”

“Sorry, I…” you said, looking back up at her. “Do you feel… different?”

Susan thought for a second.

“…no?” she said, raising an eyebrow at you. She clearly hadn’t noticed herself growing.

“Nevermind. Yeah, leftovers are on the bottom shelf.”

“Sweet!” she said. You watched her flounce over the fridge, then flounced to the microwave, and sat down and ate greedily. You were grateful to already be sitting down, because she couldn’t see how hard you were.

You looked back down at your computer. You’d only typed three lines.

Susan’s ass will keep growing bigger, you wrote.

Susan was licking her plate.

“That was good!” she said. “But now I need to- ooh!”

You saw her hips and thighs bulge out sideways, and as her ass got thicker the pad of flesh on her butt made her rise nearly two inches in her chair. More seams popped.

Her stomach growled again.

“What is happening to me today?” she laughed, patting her stomach. “God… guess this is my skip day!”

She stood up, opened a pack of pop tarts, and ate the whole pack, two at a time. Then she munched a banana while she perused the fridge. After the banana was gone, she took a sip from the carton of milk. Then she drank the carton, burped, and starting eating the remains of a rotisserie chicken in greasy handfuls.

While she pigging out, you were typing away at your computer. Susan’s ass will keep getting bigger you wrote, again and again and again.

With every bite, she did get bigger. Her hips grew wider and wider. Her thighs got thicker and thicker. Her ass was blowing up behind her, bigger and rounder and bouncing with every slight movement she made… her pants were so thin you could see right through them, to her thong and swelling ass flesh packed inside.

You stopped typing as her pants tore down the overburdened back seam. Her butt, uncontained, bulged free, even bigger now that it was no longer packed in so tight. The seams on her legs burst.

You stared, hypnotized, as her big, big ass jiggled and settled. It was getting so wide it was blocking your view of the fridge.

She looked over her shoulder, reacting modestly to her exploding pants, but not to the expanding ass that had shredded them.

“Man, those pajamas were older than I thought…” she said, almost indifferently. “I guess they- hello, there!”

She giggled. You’d stood up, and were rubbing against her from behind.

“Someone’s happy to see me!”

You pressed your hands against her from the sides. You couldn’t believe how wide and soft and warm she was. You slid her thong down, and she moved over to the table, and bent forward.

And you started to thrust into her, slowly at first, she bounced and jiggled grew.

“She’s still growing…” you said to yourself. “Her ass is still getting bigger!”

“Faster!” she said, impatiently, wriggling for a better angle. “C’mon!”

You started accelerating, pushing in faster and faster, and couldn’t believe the way both mounds of butt bounced and jiggled, faster and faster, bigger and bigger.

“Oh, fuck!” you said, as she blew up, ass expanding backwards, growing against your stomach and around your sides.

She sighed and moaned and gasped. The table was scraping the floor, and creaking under her increasing her weight. Her thighs were getting monstrously thick.

As you both came, she grew several inches thicker, growing so bit she actually pushed you back several inches with her swelling tide of butt meat.

You slid in and out a couple more times, deriving every last bit of pleasure out of the moment. You smacked her behind. Her ass was nearly as wide as the table… it was like watching two gigantic jello molds wobble, except it was your wife’s ass.

“Feel better?” she said.

You looked up at her, and realized for the first time it looked like her shift had shrunk.

“Huh…” you said, as Susan slowly straightened up.

She scooted back, and her ass was so huge it pushed you back, practically without Susan noticing. She straightened up, and when she stood upright, you realized why her shirt was so small and tight… she was a head taller than you now!

“Oh, fuck…”

“What?” she said, turning around, and looking down at you. “Is something wrong?”

As she turned, you realized her breasts had blown up as well, as they were suddenly pushing right against your face, as their soft perkiness strained against her tiny-looking white shirt.

She was more than six and a half feet, but was acting as if nothing was different.

“Nothing! I… love… you?” you said, staring up at her.

“I love you too!” she said, sweetly, patting you on the head. “But thanks to you, I just worked up a bit more of an appetite… what else do we have to eat?”

She brushed past you, almost knocking you over as her huge, swaying hips bumped you aside.

“Ooh! There’s still some pie!” she said, moments before a scarfing noise. “And cake! Oh, and cheese cubes!”

Every time you heard her lips smacking, her ass blew up, bulging bigger and rounder and closer to you.

Her shirt stretched even tighter, and ripped apart. She had to bend down lower and lower to keep reaching into the fridge. As her ass expanded towards you, you realized she was growing faster than before.

“Mind if I finish the orange juice?” she asked, getting down on her knees, continuing to grow backwards towards you.

“Honey…” you said, taking a step back, as her growing ass filled more and more of the kitchen. Her growth was accelerating.

“Don’t judge me, but I’m eating mayo straight from the jar,” she said, followed by a sucking noise. Her ballooning ass grew towards the table, and started to push it back. Down on her hands and knees, bent in front of the fridge, she was filling nearly half the kitchen, and growing bigger by the second.

“Susan…” you said, pushed back against the opposing counter, scuttling sideways to avoid getting crushed by the giant tide of Susan’s ass.

“Oh, bacon! And leftover pizza!” she said.

You dove out of the kitchen right as her growing butt smashed into the counters on the opposite of the kitchen.

“Oof! Sorry, honey, this kitchen is so small,” she said, still oblivious as her thickening posterior swelled behind her, smashing the counter and breaking the wall into the living room. “I don’t know how we manage to fit in here!”

“Susan!” you screamed, trying to get her attention over the sound of her growing butt destroying your home. “Susan! Your ass is getting too big! YOUR ASS IS GETTING TOO BIG!”

“Sorry, honey, can’t hear you!” she said, ripping the fridge from the wall, and shaking it out. “Also, I think our drywall is staring to-“

You didn’t hear her, because you were running outside.

From the lawn, you watched in awe as you 40-foot-tall wife burst through the roof. Her ass wobbled and shook precariously, making her sway and threatening to bring her immenseness down on the neighbors.

She eventually found her balance, though, even though she was nearly as wide in the back as she was tall.

“Honey… I had no idea we were so short on food!” she said, shaking the empty fridge, which was as big as a shoe box.

“Susan! You’re huge!” you shouted up at her.

Susan looked down at herself, trying to see what you were talking about.

“I mean… I guess I’m a bit on the big side, sure…” she said, almost like she was humoring you. “But I am on a diet. Don’t ruin my cheat day for me, okay?”

“I… you…” you stammered, trying to word it right. “Are you at least… done growing?”

She stared down at you, puzzled.

Instead of answering, her body tremored… and then grew to sixty feet tall. And then eighty feet.

Her shadow rose up to cover you. Her ass was as wide as the foundation of your house.

“I have no idea what you’re talking about,” she said, in a huge, booming voice.

The street shook as her tummy grumbled.

“Cheat day!” she said, licking her lips and turning towards the city. “I’m going to go get some take-out, okay honey?”

And she stepped over, her mountain of ass shaking from side to side to side as she walked. She was growing bigger and wider with every step.

By the time she reached downtown, her ass was brushing both sides of the street.

After picking up and eating a couple food trucks, though, her ass was so wide it got stuck.

After eating a couple grocery stores, though, her ass grew enough to start pushing over buildings.

After that, her ass kept growing out behind her, smashing more and more of the city, and her giant, growing body loomed bigger and bigger over the city.

You found your laptop in the rubble, with your affirmations still typed on the screen.