The experiment didn’t take long to set up, mainly as it was going to be a few injections and then waiting. While Peter wasn’t exactly happy about seeing Tali again, and Fury wasn’t on his list of friends either, he was excited to meet Pepper Potts.

Tony Stark was everything he wanted to be. Rich, handsome, and most of all successful. If he had an idol it was that man and meeting his girlfriend and, more importantly, the reason for his success, then, of course, he was excited. He doubted Tony would be here but he still had to calm down at meeting Pepper, especially with pheromones flying around.

Gwen had created a neutralizing agent after Peter raised concerns about visitors to the warehouse. The last thing anyone needed was a policewoman or family member stripping and attacking Peter just because he was excited, and he was in the process of liberally dousing himself with it. It should last a few hours and as long as he didn’t use any of his powers then the presentation should be over, and Fury, Tali, and Pepper would be gone.

Fury and Tali were the first to arrive, and trying to be pleasant Peter handed Nick a cup of coffee while Liv took Tali to one side.

“Sorry dear, gear off and into the smock. This is a two-parter and believe me, we don't want a mess for the first part.”

Natasha looked at the woman, “first part?” but Liv shook her head,

"Once Miss Potts is here we’ll begin and then prep you, okay?" And Natasha could only nod. She was under strict orders this time. No antagonising the group but keep an eye out for anything they could use.

Pepper arrived a few minutes later, complete with the entourage that Peter shook his head to, fanboy yes, doormat, no. “Sorry Miss Potts, but uh, they need to stay outside. Only you and Fury are allowed in during the procedure.”

Pepper was amazing, Peter looked her over and he was stunned by how attractive she was. A healthy tan, long blonde hair, tied up, professionally cut suit and flats. Pepper radiated authority and intelligence, with a healthy dose of don't mess sprinkled on top. She tilted her head, “really?” Peter nodded. Respect yes but he wasn't about to bend over for her.

“For your eyes only,” he said and even Fury snorted.

“Don’t argue Pep, boy here is a super spy in the works,” and Tali covered her mouth to hide a laugh.

Peter sighed, “fewer people, fewer leaks,” and shook his head. Pepper considered his words and ordered her people back out to the limousine.

“Right, now that everyone’s here, quick presentation and then the show. Miss Romanov. Please change, while we talk to your boss and Miss Potts.” Liv said and led her into Peter's home. The normal room they used for discussions like this had been cleaned up and had a reclining chair for Tali to sit on while the serum worked. There were two chairs for Pepper and Nick to sit on and Gwen was waiting with a clicker in hand.

“We don’t need the sales pitch, Gwen,” Pepper said. “We just want to see results,” and Gwen visibly slumped.

“You sure? Science is fun.” Peter said from the doorway.

Pepper nodded, “it is, but I get enough of this from Tony. I just want to know it works. Samples we got from Gwen already went to the lab, and are passing everything. If that's her standard then once we see, then the real testing begins.”

Nick had swept his coat aside and was sat with one leg crossed over the other, “I just want my agent back in  one piece, I don't need a lecture either.” and Gwen shook her head,

“Fine, fine.” She said “Liv? Is Tali ready?”

“It's Natasha, Tali was only for Peter's sake,” and Gwen shook her head again.

Natasha came in wearing a hospital gown. Liv sat her down and lifted one sleeve of the thin cloth, wiping it down with rubbing alcohol.

“Now, as you skipped the science bit,” she said while shaking her head, “this is going to be two injections over the standard one.” 

Nick frowned, “Why?” he asked.

“Natasha has already been exposed to serum, and we need to cleanse it from her system. Normally it's just one, and please Director Fury, why ask if you just ignore us? We would have explained all this beforehand.”

Natasha looked at the gun, full of the pale blue liquid, “will it hurt?” and Liv shook her head.

“No, but it will be messy, especially for you Ms Romanov. The serum did some damage yes? Noone sleeps with a target unprotected if they aren't immune to not just disease but pregnancy,” and at the Natashas eyes fell to the floor. ”I thought so, then yes, this will hurt a bit.”

“Phase one. Removal of old formal. Natasha's cells will excise and excrete the old formula. She will be sick, need the toilet, and bleed a little. This is normal as she is enhanced.”

“Wait, could you do that to Banner?” Fury asked,

Liv shook her head, “why bother skipping the lecture if you’re just going to ask the questions we would have answered?'' she admonished him again, and Pepper covered her mouth to hide her laugh.

“Banner used high-intensity radiation, gamma in his case, to bond the formula. If we undid that he’d probably explode in a nuclear fireball, so. No.”

Fury looked shocked for a second before crossing his arms, “no would have been fine.”

“Now dear, little blood to start with,” and Liv took a sample, sliding the sample bottle over to Gwen who slid it into the microscope. “And this will feel cold,” and she pressed the injector to Natashas arm. Hissing the vial emptied and almost immediately Natasha began to shake, “this bit is private dears, sorry,” and Liv led her to her home, where even Fury and Pepper could hear her being sick.

After about ten minutes, a very pale and frail-looking Natasha was brought back in. A second blood sample was taken and she winced as Liv drew the sample, “sorry dear, your pain receptors are a bit fragile at the moment,” and as Gwen slid the bottle into the microscope the difference was apparent.

Enhanced cells had a thicker cell wall, extra mitochondria, and a more regular shape, the new ones were thin and even looked sickly in comparison to what had been drawn before.

Liv took a breath. “Now, Gwen worked tirelessly on this and we can say. We have several different types. One for strength, stamina, reflexes, and intelligence. The one we’ll be using on Ms Romanov is an allrounder. Similar to the one used on Mr Rogers in the war.”

“What about radiation treatment?” Fury asked.

“Oh, you mean the treatment we would have brought up in the presentation Mr Fury?” and even Nick looked embarrassed as Liv told him off once more.

“In the initial experiment, Rogers was exposed to something we only know as Vita-rays. Banner attempted to use gamma radiation as a substitution but we all know what that led to. We use a chemical binder to bond the formula to a person's DNA. It's safer and more abundant without harming the patient. While you won't be a Hulk, Ms Romanov, the results will be impressive. Now, we can also use the formula without the binder. It lasts roughly a month before the body cleans itself completely, but until then you have a slightly reduced effect but without it being permanent. I leave the choice to you.”

“Wait, you can enhance someone without making them a supersoldier?” Pepper asked and Liv nodded

“We plan, Ms Potts, on licensing the formula through Stark Industries, allowing you to take government contracts as well as civilian ones.”

“Wait, civilians? No, not a chance in hell,” Fury said, leaning forwards.

“Mr Fury, sit down. Remember that lecture you were impatient and didn't listen to. All low concentrations, billions of parts per litre, the formula acts as a medicine. Curing cancer, fixing degenerative muscle, bone and tissue diseases, all without enhancement. So if you're asking if Gwen and I would like to make a large amount of money, then yes, but that's Miss Potts department, you’ll have  to deal with her.”

Fury didn't look happy about that, but right now as everyone thought he was being an ass, no one cared.

“Now, Natasha, this will be strange.” and Liv pressed the second injector gun against her jugular and as it hissed the small vial emptied.

“If this was a one-off treatment then that would be it, the serum makes its way to the brain and begins there, propagating cellular changes throughout the nervous and lymphatic system where eventually it is picked up by the heart and passed throughout the body by the vascular system. That's your veins and arteries, Mr Fury, just before you ask,” but Nick just shook his head.

The changes were apparent to all watching, Natasha was beautiful anyway, her finely sculpted cheekbones sat on a perfectly angled face. Even looking sickly she was still attractive but now, her skin almost shone as it absorbed the formula and her face seemed to tighten. Her hair gained lustre and body and while the pair of Potts and Fury couldn't see, Natasha felt her breasts shrink slightly and perk, her pubic area soften and then tighten, and a few scars she had itched and then faded.

As the formula spread through Natasha, she felt even better than when the Red Room had strapped her down and dosed her. It was joy, it was pure freedom and as her cells drank in the formula she felt alive with energy.

Liv stared into her eyes and lifting a wrist took her pulse. “That's about it. If you would Ms Romanov,” and she turned her arm and Liv took a final blood sample.

With all three side by side, the results were apparent. The last cell was much healthier, thicker cell membrane with modified mitochondria. Even a non-scientist could tell that compared even to the first one it just looked better.

After leading Natasha away, Gwen handed a file to Pepper. “The formula contract, once you sign we can start with the process of manufacturing and testing. I’ll be an onsite consultant but whatever deal you strike with Fury is between you two, as long as the requirements are fulfilled we don't care what you use it for.”

Pepper nodded as she flicked through the contracts, legal would have a field day with these but at least Ms Stacy had been thorough.

“And my agent?” Fury asked.

Gwen shrugged, “that's between you and her.”

A full healed and confident Natasha strode from Liv home, “I'm fine, “ was all she said, but she and Fury both knew that a barrage of tests was waiting for her once she got back to Shield headquarters.

With the test over and a positive result, both parties left, leaving the warehouse back to normal. 

“Well, I scanned the place and I don't think Director Fury left us any surprises Peter, but you know, he’s a super spy. It wouldn't surprise me if he did.” Liv said, holding a detector in one hand. Peter fully expected Fury to bug the place, or at least try to.

He sighed, “it's fine, if there are we can worry about them later, but right now, MJ?”

MJ had been waiting in her home until the group's presentation had finished. She was next in line for enhancement and Muse and she had already separated to avoid hurting the symbiote.

Peter did find it strange when the normally hidden creature spread out and then peeled itself free of MJ, watching as she visibly sagged without the symbiote to support her and he hoped she was dealing with a few issues okay. She had looked up, bit her lip and nodded, “fine, I'm fine” and reached over to gently pet the symbiote waiting on the kitchen table, her smooth white skin glistening as it wobbled and bobbed up and down.

As they didn't want every secret to be revealed, the group prepared MJ, not just for enhancement but a fresh dose of Peter's blood had been extracted already and the symbcells within it purified and made into the second enhancement serum. Peter wanted his loved ones to be the best of the best and with both, MJ would tower above normal mortals as a goddess.

As both serums worked on MJ she was watched over by the group. Unlike Natasha she was naked and they watched to see what physical changes would occur. Under the artificial light her hair lengthened slightly and grew shinier, Her pale skin and very Irish in origin took on a whiter almost alabaster appearance and her green eyes sparkled like emeralds. She seems to gain a few inches, grown in the chair and her arms and legs became thicker than normal, wiry muscle building and adding healthy weight to a fragile normally ill-looking frame. Years of neglect from an intentive father had given her a smaller than normal frame and build and the formula had corrected that. Her chest grew as well, taking her average B cups up into a C, and her pale pink nipples crinkled and enlarged. At her groin, her shaven crotch grew new fiery red hair and even Peter was shocked to see her labia shrink slightly and tighten visibly.

Having never seen what Gwen or Liv went through, and Peter and Felicia being the first pair, watching MJ was amazing for them. She became even more perfect to Peter and he coughed slightly and Gwen raised an eyebrow at him, “uh,” and he looked down. MJ had started giving off a sweet floral scent, now very noticeable to him and without thinking he had grown erect. “Pheromone,” and Gwen laughed, taking a sniff and looking at Peter, bit her lip and nodded. 

“Not just you,” she said and Peter began to smell it from all three of the others, MJ was now making them just as aroused as he was. While their scent was the natural scent of a woman, hers was definitely like his. 

“You’re just all fucking horndogs,” she laughing and as Liv tidied away the bottles of formula, MJ stretched and stood up, wobbling slightly. “Taller, that's weird,” she said and grabbed her new chest, “these too,” and giving them a squeeze she moaned, and Peter noticed a slight glisten from between her legs. “Damn, sensitive,” was all she said before striding out of the lab.

Muse saw her and flopped over, her form slowing around MJ and covering her.

“We are home,” she said and the new enhanced Muse tried out her newer powers. She grew, becoming almost 7ft tall with thick muscular arms and legs, she stared at Peter. “Death by Snu Snu,” she yelled and leapt over to him, grabbed him by the waist and ran into her home.

A bemused trio watched and heard as the home began to vibrate with their pounding. “You’re next Gwen,“ MJ shouted and Gwen stared at Liv, who shrugged, unsure if she would stop there.