First, She needs to change.

“Okay dear, I am going to have to ask you to change.” Dr. Johnson said, handing her what looked like a white bikini.

“You… want me to wear this?” She asked.

“Yes ma’am, in previous trials there has been an issue with clothes not being able to withstand the changes.”

It took Ava a moment to register what he was implying but once she did, she couldn’t deny that the thought excited her.

Ava nodded and took the clothes from him. The doctor turned around while she shimmied out of her clothes and put on the outfit he gave her. Ava was surprised with how well it fit, chalking it up to the very elastic nature of the clothes.

“Okay I’m finished,” Ava said.

The Doctor turned around holding the small paper cup that was on the counter. Ava had spent much of her life in front of a camera, posing in far more revealing clothes than she was wearing but under the scrutinizing eye of Dr. Johnson, she couldn’t help but shift uncomfortably and try to conceal her body.

After a few seconds, he reached out and offered the paper cup to Ava who happily took it, guessing what it contained. She found she was right when she looked inside it and saw a lone pink pill rattling around as she shook it.

“So this is it?” She asked.

“Yes, if you would like to back out this is your last chance. Just remember you signed several NDA’s”

“No no… I’m ready” Ava said, thinking only about taking back her career and youth.

“Well whenever you are rea-” The doctor couldn’t finish his sentence before Ava threw her head back and tossed the pill into her mouth, swallowing it without any water. For the brief moment that the pill landed on her tongue, she got a taste of a sweet sugary flavor.

Dr. Johnson smiled, they hadn’t had a participant be so willing to be apart of the trial and Ava’s enthusiasm gave him great hope. “If you don’t mind, I have some things to check on, if you are bored, we keep a couple things to entertain patients in the cupboard beneath the sink.” The doctor said kindly, “We will keep an eye on the trial from our camera room, I will check on you once it is over but if you need anything, feel free to call out and we will be here.”

“Thank you doctor,” She said as she sat on the bed, scooting against the wall, “How long should it take?”

“Not very long at all, part of the tweaks we made with this formula is to make the process faster.”

He wasn’t wrong, as soon as the door shut behind him and the lock engaged, she felt a tingle run throughout her body.

The next few minutes were a blur to Ava. The tingling sensation seemed to pulse up and down her body, from the tip of her hair all the way down her feet before finally concentrating in her waist.

The burnt out model felt her tummy tuck in, any loose skin and wrinkles became smoothe. She grinned with approval as the changes ramped up, feeling her entire body lose any evidence of aging and giving her the body she had in her early twenties.

The next part to perk up were her breasts, the sag they developed over the years vanished and her nipples faced upward instead of pointing to the floor, or at least they would have if she wasn’t wearing the bra provided by Dr. Johnson which gave a surprising amount of support.

Speaking of that Doctor, She thought to herself, He’s such a kind man, I’ll have to thank him properly the next time I see him.

Ava didn’t know it, but the pill was beginning to affect her brain, ramping her sex drive up second by second. Already she was thinking about the attractive man who had provided her with such a wonderful opportunity, finding that her body would be the perfect payment, and seeing herself as someone whose value was derived from sexual capability.

The changes to her breasts were not exclusive to just how perky they were, the tingling sensation did not subside but rather increased noticeable as they began to swell. Ava moaned as they inflated, the feeling of soft, warm fat flowing into her youthful tits was exhilarating.

“Wow, you girls sure are getting big,” She cooed as they pushed her fingers apart, their incessant growth was incredibly sensual. Ava could feel the bra provided by Dr. Johnson start to grow tight. Luckily for her the elastic material put up a good fight even though there was a small amount of overflow and side boob beginning to appear.

The tingling in her breasts would not stop for a while, in fact, it was the last sensation to fade by the time the trial was over. While her breasts continued to grow, the feeling of a soft electrical pulse traveled down her spin and settled into her hips. Ava smiled brightly as it spread out, tracing her hip bones and creeping down her legs. The pleasant buzz reached a similar climax as she watched the small crops of cellulite that had begun to appear after her thirty-fifth birthday smooth over, the skin becoming soft and supple, elastic and flawless.

Her hands stopped teasing her breasts and one found its way down to her butt, or rather her hips as she felt fat begin to flow and swirl inside them. The tingling that coursed through her seemed to burrow into her hip bones which immediately reacted, flaring outward and becoming perfect birthing hips to complete the hourglass look. These would be perfect for holding onto, she thought to herself, imagining a man taking her from behind and using her for his pleasure.

As her hips grew and grew, she could feel her butt plumping up too. What was once her least noticeable trait became a dominant one, swallowing the bottoms she wore as if her ass was starving.

The window next to the door was conveniently a one way mirror and Ava could see the process happening in real time. Her hands ran up and down her body, feeling the soft curves of her body. She had become the exact envy that every one of those models strived for, thick where it mattered, skinny where it fit and perky all around. All her curves were perfection without being excess, as if she were photoshopped by the best editors in the industry.

Her breasts shifted heavily on Ava’s chest as she moved, the bra straining against her enhanced bust. Ava’s boobs had already been large to begin with, and while they had grown larger and certainly perked up, they hadn’t become too large, but certainly so large that they jiggled impressively and were sure to captivate anyone's attention.

Not only had her body grown in various ways, but also the sensitivity and pleasure she derived from touching herself. It was for this reason that Ava now found herself pawing at her breasts, tweaking the stiff nipples that jut from her soft mounds. She leaned her head back and moaned as pleasure shot through her body like a bolt of lightning, causing her snatch to soak through her white panties.

Without a second thought she plunged her hand into her damp pussy and found her buzzing clit. Just brushing it with her finger caused her legs to wobble from the intense pleasure. Ava spread her dripping lips and let one of her slim fingers penetrate in while her palm pressed against her sensitive button.

Feeling her finger reach inside of herself was maddening, she couldn’t get enough and needed more. The walls of her pussy seemed to grip her finger as if alive, clamping tightly as it greedily fought for stimulation and wanted, no, needed to feel something inside of it.

She found just one finger to be too little so she stuffed another inside, both digits thrusting in and out until she found it couldn’t satisfy her needs and she added a third finger. Still, Ava wanted more, she NEEDED more. Just as it seemed like she would never come, she remembered what the doctor had said about entertainment in the cupboards beneath the sink.

Her eyes that hadn’t opened since she began playing with herself snapped open, darting toward the sink. Ava crossed the room as swiftly as she could, enjoying the way her new body moved and how her breasts hung heavily from her chest while still retaining their shape when she bent over to open the cupboard.

“Oh… my god.” Ava said when she saw what was behind the door. Never before had she seen so many dildos, each one unique in its own way. From the size of her forearm down to the her pinkie, vibrators, realistic cocks, tentacles, horse cocks, glass toys and some she had no idea what to do with.

Her eyes settled on a bright pink toy, roughly as wide as a pop can but twice as long. It was the shape of a penis but larger than any she had ever seen, real or otherwise and it caused her to giggle as she took it in her hand. She gripped it by the shaft, the veins were stiff and ran up and down its length giving it a splendid texture. Ava lifted it up to look at it closer, the large head of the fake cock seemed to stare back at her and she found that she was bringing it closer and closer to her face. Her moist lips separated as the subconscious need to put it in her mouth overrode the rest of her desire to fuck herself with it.

Fireworks went off in her head as she took the oversized cock head into her eager mouth with ease. She spent several minutes swirling her tongue around the dildo and thrusting it down her throat with ease, pleased by the lack of gag reflex and the amount of pleasure she was receiving from sucking a dildo.

Before long Ava could feel her thighs slipping against one another, her wet pussy dripping so much that it coated her inner thighs down to her knees and ruined the paper on the examination table.

The feeling of her leaky pussy soaking her legs reminded her of her desperately empty sex. Glancing over to the still open cabinet, Ava’s eyes landed on the wide array of toys.

“Omg… I could be double stuffed…” She mumbled to herself around the dildo in her mouth, the sentence would be unintelligible to anyone listening but to her it was the hottest thing she had ever heard.

She walked back to the cabinet and looked at them quizzically, now licking the dildo like a popsicle, enjoying the feeling of the veins on it as she pondered which dildo to select.

Finally, Ava reached out and grabbed the one that resembled a tentacle. The two foot long toy was easily six inches wide across the bottom but tapered down to the tip which couldn’t be more than a quarter inch across, with suction cups along the length like an octopus’s tentacle.

She spun around with it, feeling her heavy tits bounce across her chest and back, an odd sensation that she was used to if it weren’t for the firm orbs of plastic that shifted within them. Ava squatted down and stuck the large dildo to the floor, the suction cup on its base gripping tight. She giggled as she stood over it, momentarily taking the dildo from her mouth as she watched her pussy drip onto the tentacle beneath her.

Ava lowered herself down and felt the narrow tip touch her lips, spreading them gently as she prepared herself. Sucking on the dildo, forcing it balls deep down her throat as she plunged down on the one beneath her. Screams of pleasure reverberated off the walls around her as Ava was filled from both ends for the first time, her enhanced body couldn’t keep up with the overwhelming pleasure and she felt her vision start to darken, losing consciousness with a smile on her lips.