Samantha swallowed, took a deep breath, and stepped up to the door of the large house, hearing the music blaring. “I’m eighteen years old now, practically nineteen”, she reminded herself, smoothing her hands over the skintight black bodysuit, “I can go to any party I want. They can’t hurt me.” Before she could stop it, her hand shot out and rang the doorbell.

She already regretted it. She’d considered a bunch of costumes beforehand, but Gemma had said very specifically “go sexy, Sam. Pete’ll be there. You wanna look good for Pete, right?” And she did. She really liked Pete. But she really wasn’t sure “sexy cat” was the right option, after all. The ears were stupid, she was tottering in the black heels – which she just wasn’t used to, (and she still felt short) – and the black bodysuit was a bit too tight over her slightly chubby belly. She just felt a bit gross, and like she’d put herself out there for no reason. She was just dumpy with no boobs, and that was that. She turned to leave-

“Oh, you came!” Janey’s head poked around the door. She looked perfect as always; chiseled features, perfect blonde bob, bright blue eyes. Sam found herself dimly wondering what Janey was wearing – she knew her large, pert breasts would be on display. She could only see Janey’s head in this angle and light. “Come on in!”

Sam stepped into the dim light of the hallway, and put her bag down.

“This way, come on.”

She moved through the semi-darkness, into the living room, where the music was coming from. She felt inexplicably nervous. “It’s just a party, Sam”, she told herself, breathing deep. Her chubby frame felt too big inside the bodysuit. “Maybe I should’ve just come as a schoolgirl”, she thought. “This costume is ridiculous. At least everyone else will have made an effort.”

She stepped through the door.

Blinking, she felt bright lights on her.

“Everyone, this is Sam!” Janey presented her.

Sam looked around, blinking. Her eyes adjusted, and her blood ran cold. All she saw was a room full of normal high school kids. In their own clothes. She saw Gemma sitting on the couch, with Pete. Gemma giggled, and looked away. She didn’t even have the decency to look contrite. She moved her hand off Pete’s knee.

Sam stared, stunned, at Janey. Did people actually do this kind of thing outside films? This was some Carrie shit.

“Surprise!”, said Janey, adding: “Nice costume.”

Sam started to hear the sniggers spread around the room. “Hey kitty-kat”, “Miiiiaow” and, incredibly one dickhead quipped: “nice pussy”. She felt her face begin to flush at the sheer betrayal of it all. She tightened her jaw, and looked one more time at Gemma. Gemma looked away. She wasn’t laughing anymore. Sam’s face turned a bright crimson, flushed with rage and embarrassment. She began to feel tears prickling at the corners of her eyes.

“Muah!” was the best she could utter, as a burst of anger burst forth from her mouth as she ran out of the room. She didn’t know where she was going – everything was a blur and tears were in her eyes and she couldn’t believe Gemma had done that to her; they’d been friends for years! She just wanted to get in with Janey and her clique. “Fuck her!” Sam thought, angrily.

She pushed open a door, and slammed it shut, leaning hard against it, tears falling down her face, smearing her make-up and pouring a trail into her mediocre cleavage, which she’d struggled to create even with a push-up bra. Her chest heaved with deep sobs. This. Was. Fucked.

She went to dial her phone to get a cab home, then realised her bag was in the corridor. She smacked against the door in anger.

“Do you crave revenge?”

Sam jumped what felt like a foot in the air. Her heart was racing. It was a soft, seductive voice, that normally would have relaxed her, but where the fuck was it coming from?! She looked around the bathroom. No one. It was a huge, white marble beast of a room. Sam looked, shaking, in the white hot tub. Nothing. She peered behind the shower curtain. No-one. She moved to the sink – and that was where she saw…her.

A black hood, shrouded in faint smoke, covering a face, leaving naught but a delicately shaped chin, and two bright red lips.

A pause. Sam laughed.

“I must be fucking traumatised by those jerks, seeing things in a mirror.”

“I am no thing. But I can help.”

Sam jumped! “Shit, you can hear me!”

“Yes. Obviously. Now shut up and take my gift.”

“What do you-”

The shrouded figure thrust a hand forward, and Sam fell to the floor.

***

“Sam…are you ok?”

Sam blearily opened her eyes, the figure’s voice floating around her head. “Every insult makes you grow as a person. Never forget this.”

Sam could hear a voice from the other side of the door. It was Gemma.

“Uh, yeah, I’m cool. Just…slipped.”

“Oh great, we were really worried about you!”

“Yeah, thought you might’ve cut yourself all over my marble!” It was Janey.

“Janey!” Gemma said.

“Oh fuck her, she’s pathetic.”

“Janey. I’ll be right back, Sam”

Gemma heard their voices going away from the door, as she sat on the floor in her ridiculous costume. But something was taking all of her attention. Her black bodysuit was…there was no other word for it: tightening. While Janey and Gemma were speaking, she’d felt this blast through her body, and she was…getting bigger. She wondered if it was just the whole being-knocked-out-thing, but she could feel her skin stretching, and the fabric tightening as she…fuck, she grew.

She looked down, and realised the growth seemed primarily confined to her breasts, which were slowly inching forwards with each passing second. They’d never been more than an inch straight out before, and they were slowly spreading forwards, pushing against the tight black fabric of the catsuit. Incredibly, she saw her stomach flattening as her breasts swelled, and the redistribution was incredibly pleasurable, even arousing. She was literally blowing up, but it seemed like all the size was coming from where she didn’t want it.

Sam felt herself rising up from the floor. Shocked, she turned around to see her usually very small behind slowly expanding, pushing herself up from the floor. She could see her ass cheeks blowing up, as if attached to a gas tank, pushing out, lifting her up, spreading out, taking up more and more space in her catsuit. She reached down and felt her new, larger ass, and grew increasingly wet as she felt her warm rear expanding into her hand. It was swelling bigger by the second.

Suddenly, she remembered her tits, and felt back – she was shocked to find they now bulged out a good four inches from her chest – and she had cleavage! It was a cheap black catsuit that she was wearing, but it had ample room in the chest for cleavage to show. She hadn’t really had much to speak of until now, but her breasts were pushing together in a very pleasing shape, creating a small valley where they touched and bulged up a little. She found herself reaching down to her cunt without even thinking about it.

She began playing gently with her clit, rubbing the right, rock-hard nipple on one of her engorged breasts, which poked out a good five inches now, and was really pert, round and swollen. She was amazed at how large they were already. And they were getting bigger. For some reason, the growth really turned her on, and she began rubbing her clit faster and faster, playing with her nipples, getting more and more horny-

“Sam! Are you still in there?”

It was Gemma again. Sam dragged herself out of her revery, and moved to stand up. Wobbling on her feet, she went to examine her face in the mirror, but could only see her chin. That was weird. Maybe the mirror had fallen off when she passed out. No, seemed fine-

“Sam, are you ok?”

Sam looked down, to see her catsuit riding up her legs. It was now way above her ankle. Had she – was she…my god, she was taller. With her heels, she was close to 6 ft, but they were massive heels. What the hell was going on?!

“Sam, please answer me!”

Sam hefted her new, six inch-protruding boobs, stretched tight against the struggling catsuit, looked at her large, swollen booty, and admired her svelte, 6ft figure in the mirror. She looked fucking incredible. Her growth seemed to be slowing, though. This wouldn’t do. Suddenly, she had an idea.

“Fuck off, Gemma.”

A pause.

“What?”

“I said: fuck off, Gemma. You’re a pathetic, sycophantic waste of space and I want nothing to do with you.”

Her heart pounded as she blurted out what she really felt.

“Um. Fuck you, bitch?”

That was what she wanted. “Every insult makes you grow as a person”. Whatever that weird thing in the mirror was, Sam had an idea what she’d done to her: the more people were rude to her, the bigger she’d get. This was very interesting indeed. Sam suddenly realised she wanted to be big. Very big indeed.

She could feel a warm glow suffuse her every being, as she began to swell. Her heart pounded with excitement as her chest bulged outwards, slowing growing inch by inch. She could her the fabric stretching as her two twin balloons slowly inflated bigger and bigger and bigger. She looked more and more like a blow-up doll, and her tits showed no signs of stopping. They were two huge basketballs resting lightly on her chest, perky despite their huge size, and her nipples were disproportionately large, poking through the fabric like two big bullets. She genuinely thought they were going to rip through. Everything felt so tight; she was getting so incredibly horny, but all she wanted was to grow bigger.

She moaned with pleasure, as she heard the fabric continue to stretch around her growing ass. She could feel her skin stretch as her butt swelled bigger and bigger with each second. She was growing a truly ghetto booty, and she loved how tight her catsuit already felt. Looking in the mirror, she could see her incredibly figure slowly rise, as she grew taller and taller with every passing second. Her horniness grew as she did.

“What did you say to me, you cunt?” she could barely get the words out, she was feeling so swollen and aroused, her massive nipples poking almost through the fabric of her struggling catsuit. She felt a weird rubbing sensation, and realised her bra had burst off her massive, growing tits ages ago, and was stuck floating around the inside of her catsuit, around her shoulders. She reached inside her costume, which was deliciously difficult (it was full of huge tit and bulging ass) and fished it out. Sam felt like she was going to pass out with arousal as she grew bigger and bigger and bigger. She loved the feeling more than she could describe.

“Did you just – I’m not a cunt, you’re a cunt!” Gemma responded lamely, sounding unsure, but hurt.

“Mmmm, yes!”, Sam groaned, feeling the insult flowing into her, blowing her up, filling her already huge tits and ass, growing her whole body. Her basketball-sized breasts bulged forwards, taking up more and more room in her catsuit. Looking down made her heart race – all she could see was a huge expanse of cleavage, as her eight-inch protruding breasts bulged forwards. Her catsuit was getting pretty tight now, but Sam planned on making it much tighter. She was going to be colossal. Her ass swelled at the very thought, pushing out further and further, giving her an immense butt.

Sam estimated she was around 6’2 now, so she lifted her leg to remove her heels. She wanted as much room for growth as possible. Raising her leg to her chest proved difficult, as there were two massive, still growing orbs taking up a lot of space. Her knee pressed firmly into the huge round base of her swelling right breast, but she managed to take the shoe off, leaning against the wall. She did the same with the other, and stood at her true height – now just over 6 ft. She could feel herself growing further, and she was amazed at how turned on she was. Her tits were now a comfortable nine inches straight out – two massive basketballs, and still growing and wobbling. Her ass was just tremendous – two massive, shapely cheeks crammed into a now struggling catsuit. She looked like an inflated supermodel. She wanted a fuck.

She moved to the door, and pressed her head to listen. She realised, with a further jolt of arousal, that her huge tits were pressing into the door, even though her head was a few inches away. These babies were going to take some getting used to. Not that she was done growing yet. Not by a long shot.

Turning her head to the side to allow her massive jugs some room (she didn’t want to impede their growing in any way), she vaguely heard Gemma’s plaintive whining.

“Why are you being so difficult, Sam? I just wanted us to have a good time at this party-” before Sam slammed the door open, making Gemma stagger back. Her eyes widened, as she took in Sam’s huge new form.

“Sam…is that…what’s going…you?”

“Say what you really think of me”, Sam’s voice came out pleasantly deeper, more husky. Her huge tits wobbled and swelled as she strode towards Gemma, her huge ass tightening in her packed catsuit. She dimly wondered how much more growth it would take, knowing full well she was going to put it to the ultimate test.

“I, um, I mean – what do you want to hear?”

“The truth”, Sam said, forcefully. “Or there’ll be trouble.”

Gemma looked genuinely afraid. “What’s going on, Sam?”

“Oh you’re useless”, boomed Sam. “You’re too much of a coward to insult someone once they’re bigger than you. Where’s that lovely Janey?”

Gemma pointed, slightly shaking.

“Thanks, babe.” Sam leaned down, her huge tits almost falling out of her skintight catsuit, thrusting her enormous cleavage in Gemma’s face. “And thanks for the invite. I’m going to fuck Pete now.”

“No! You can’t! Don’t be a bitch!”

“Mmmm, excellent”, said Sam as she walked away, growing taller with each step. Gemma watched as Sam’s already huge ass widened to almost meet the narrow doorway as she left. The silhouette was of this impossibly huge, swollen beauty, and Gemma just couldn’t understand it. Sam, for her part, couldn’t believe how loud her footsteps were. Every time her growing feet hit the floor, the house shook. The sensation of power flooded through her, and she grew more and more turned on.

Janey first. Then Pete. She wanted to be nice and big before she saw Pete.

To be continued…

(Part II here)

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