Let the infected do their thing, the track sounds more fun

Aiden decided to pass over the cardio room for the moment, instead opting to head upstairs to where the half-track was. He felt like chasing some prey. Luckily, the perfect target was already running. A black-haired woman of medium build, her entire body toned but still possessing some gentle curves. Aiden smiled with a feral grin and started to run after her, his large cock bobbing as he ran. It only took a moment for the woman to realized he was running behind her, and from his erect dick and maniacal grin, she had no question about what he wanted. She screamed and picked up her pace, Aiden doing the same.

Embracing the chase more and more, Aiden allowed his body to shift, becoming sleek and cat-like, not adopting a strict from so much as becoming an amalgamation of many. He dropped to all fours, legs changing to push out more power. The woman screamed again at his bestial appearance and tried to speed up again, but exhaustion was taking its toll on her. She only lasted another half lap before Aiden lept at her, knocking her flat on the ground.

"Grrr, a good try, but futile," Aiden growled, moving his sharp claws over her running shorts and sports bra, deftly slicing them apart. The woman whimpered, but Aiden paid it no mind, knowing that she'd be begging for what he was going to give her in minutes. Snarling, he probed her surprisingly wet folds and slid inside, fucking her from behind like an animal. Once again, he abandoned himself to the virus, enjoying rutting into this beautiful creature.

The woman was surprisingly quick to reciprocate, either giving over to her fate or actually enjoying it from the start. Aiden didn't really care, all he was concerned about was his impending orgasm, the building pressure helped along by the woman's already changing body, the virus having overtaken her system almost immediately after infection.

Her hips widened slightly, promising a swaying view to any onlookers. Her ass similarly expanded, forming plush globes that Aiden took in his clawed hand-paws. The woman moaned at his squeezing, lust coursing through her blood as the giant beast behind her continued his fast pace, stretching her pussy with every stroke. Claws appeared on her hands and toes and her black hair grew out from its long bob into flowing curls. Her ears moved, sliding from the sides of her head to the top and taking on a feline appearance. They flicked in the air until Aiden gently grabbed one, unknowingly stimulating the new erogenous zone and immediately throwing her over the edge, already tight cunt squeezing her corrupter harder.

Aiden growled again as the woman clenched down on him, only able to thrust in a few more times before he had to cum, shooting his hot load into the woman's quivering pussy. Her moan turned into a loud purr, her transformation cascading to completion. Her breasts grew a few inches, nowhere near the mountainous sizes of other infected, but more than she had before and enough to make anyone want to squeeze their face between them. Her eyes turned golden and a slim tail sprouted above her delectable ass, swaying teasingly. The transformed panther woman pulled herself off of Aiden's cock, only to turn around and suck their combined juices off of his bestial member. Aiden quickly blew another load between her plump lips, her deft tongue coaxing him to another orgasm.