"You know, if you want to back out of this idiot plan, it's not too late."
Teresa let out a breathless laugh at the joke from the lab-coat wearing woman standing over her. "Already jammed the needle into me. Might as well finish the job."
She was doing her best to remain jovial mostly for the sake of retaining some sense optimism in what was proving to be a hopeless time. Just a scant two weeks prior, the Latex Futanaris had dropped all over the world, and instantly begun to spread like a plague across the whole planet. Everywhere they went, they converted all they encountered, every human, every animal, every plant, every shred of biomass in their wake was being turned into more of their own kind by the floods of their bodily fluids. Most major cities were overrun, the governments not collapsing were under martial law, and anybody who could hold a gun was being drafted just to go out and try to buy time. Fleets of drones were holding the line, but every machine lost sent them ticking closer to defeat.
The potential extinction of the human race in just a few months was the sort of situation that called for drastic action - and truth be told, Private Teresa March couldn't imagine anything more drastic than this. Doctor Yvonne Hammond, the head researcher of this deep-mountain facility, had been nothing but honest in explaining the procedure she was volunteering for, and the downright enormous risks involved - the older woman seemed to have taken a shine to this buck private fresh out of basic, being roped into a fate that might be worse than death. Even gave her a fancy maybe-last meal the night before... and personally ensured that she didn't end up dying a virgin. Hence the blush that came onto her cheeks whenver Yvonne was near her.
Transformations induced by the latex semen couldn't be stopped or protected against... but Yvonne was certain that the mental aspects could be effectively countered. She'd been working tirelessly for weeks to make alterations to a soupy sample of the stuff, reconfiguring it to something that would confer all the physical benefits - the near-immunity to conventional weapons, the enhanced strength and speed and endurnace, the enormous physical durability - without shackling the transformee to a need to assimilate others. If they could grant those abilities to a group of soldiers, turn them into super-soldiers still loyal to humanity... well, they'd sure as hell be better equipped to save the human race than anyone else available.
Teresa was about to be the first test subject for this process. One last affectionate look was shared between them as Yvonne sealed the private inside the plexiglass containment unit, where she currently lay nude and strapped to a metal bed. Their eyes met, Teresa smiling as if the doctor was the one who needed more reasurnace here. She had done everything possible to make the private aware of the risks, and to ensure comfort and happiness in what might be her last days... and none of it helped much to ease the guilt over what she was about to do. Not even the knowledge that this could be the difference between assimilation and extinction prevented her from feeling like she was about to throw away a young woman's life without cause.
But there was no time for her own regrets to hold things back. She forced herself to finish sealing the private inside before moving back to the adjacent control room, a swarm of armed guards standing ready to put March down if things went wrong. She didn't allow herself the chance to look up as she flicked the switch to activate the injection. She couldn't get caught up in her own feelings, no matter how strong said feelings had become when it came to the private. This girl she adored was, ultimately, a test subject... one who knew the risks, and who had accepted the possibility that she wouldn't come out the other side of things. The material was flowing through the IV line already, entering into the girl's body, and now... now it was too late to do much but observe.
The changes were as immediate as they always proved to be. Veins shifting color quickly as blood was supplanted by latex - a bright sapphire in Teresa's case. The girl moaned as she felt the semen's mutative properties seeping into her flesh, rewriting her DNA at a base level. She quickly began to undergo three extra years of physical maturity, aging up to a 21 year old in her physical prime so that her body would be ready for full conversion. A scream of delight left her lips as her chest swelled up, becoming like a pair of basketballs, the skin shifting to a blue color and squeaking as they rubbed together. That same blue color and material spread over her body from there, covering her torso, her arms, her hips and thighs as they swelled out to give her an impossibly curvy hourglass figure.
It didn't take long at all for the latex to cover every inch of her skin and hair, leaving her shiny under the artificial light of the lab. Her hands desperately tried to reach for her groin as, right above her entrance, a burning sensation heralded the emergence of three shapes. One long and thick, the other two round and huge just like her engorged breasts. The rod that shot up out of her was instantly erect, her testicles inflating with sticky hot fluid that was soon leaking out the tip of her thick, throbbing member. It was the same sort of fascinating yet horrifying transformation Yvonne had seen a thousand times before - yet the nature of who was undergoing it left an ache in her gut. It took everything she had not to cry once the poor young lady seemed to calm down, a hand shakily reaching out to activate the intercome unit in the containment cell.
"Private? How do you feel?"