Sam's trousers fell into a heap around his hairy bare feet. Next he peeled his shirt off and threw it in a corner. Jen looked longingly at his well-toned pecs, dusted with dark brown hair that swept around his his thick muscles and circled his nipples.
He gave a her a big smile as he pulled down his boxers, kicking they and the pants away.
"Man-wolf city, here we come!"
Jen gave a nervous laugh and stared at his thick, ruddy penis. The limp strip of meat hung over his tangly forest of pubic hair. Jen felt slightly hot and jumpy.
Sam moved his hand to his penis and began stroking it, while looking directly at Jen. "Are you thinking about me?" She asked.
"You bet!" laughed Sam. His organ began swelling up and growing rigid. Was it just her, or did Sam's chest seem even more hairy?
Sam's face took on a dreamy expression as he played with himself.
"Hey Jen."
She stared at him open-mouthed, as his penis started thickening and reddening, pushing outward and then upward.
"W-what is it?"
By now hair was sprouting from Sam's chest, engulfing his muscles and racing across his arms and legs.
He smiled and looked at her crazily.
"You smell real good."
She looked at his face. His ears were pointy and shooting upward. His eyebrows had met and stubble was crowding his cheeks. A mischiveous grin shot across his face, revealing lengthy canines. His eyes had turned yellow.
"My God!" she yelled, "It's working."
Sam closed his eyes in pleasure as he flexed, his upper body bulking up and spasming, as each spasm increased his muscles size. Hairs sprouted over each joint of his fingers and toes, which he wiggled and laughed--in a heavier tone--as they grew longer and longer.
In spite of her feelings on incest, Jen felt her control slip away. She felt hairs slip out from her forearms, while her nipples grew rigid.
"I can smell your juices Jen." Drool leaked from Sam's mouth, as his nose stretched outward, darkening and turning rougher in texture. "I can smell your cunt. It's driving me crazy." His fingers, now adaorned with growing claws, clumsily massaged his bloated, red penis, as the head pointed skyward and began mutating, skin enveloping the shaft and pulling it toward his lower belly. "Arrrghh...I want to fuck you so bad!"
Jen felt uncontrollably hot, and tore away her top, exposing her breasts. She could feel another pair start forming below them. Dizzy with a steadily lessening feel of guilt and an ever-rising tidal wave of pleasure, she gave up her self-control, just as a tail began snaking forth from Sam's ass and the transformations began their climax....