Running, his shirt in tatters from the claws of the female wolves, Greg tried not to think about the burning heat coursing through his body, the tightness and pain in his muscles, his panting breath, or the image he could not get out of his mind... Brenda, his own girlfriend, changing into a bear, crying out with lust. "Fuck me now, wolf-boy!" she had moaned. Greg's manhood throbbed as he ran.
No! He couldn't give in... he didn't want to be a... monster, like his friends had become! His friends... He thought of Cameron, who even now was shoving his zebra tool into that female...
Greg groaned, stumbling as he ran. "No... I can't give... in..." Thoughts of sex were forcing all rational thoughts away... one of his hands was tugging at the front of his jeans, desperately wanting to bare his organ to the cool night air, to find a female and impregnate her, even as his other hand rubbed his own lightly-furred chest. "Have to... fight the change..." he struggled to his feet, but then stumbled over again as his feet twisted of their own accord.
Greg could feel his shoes becoming tight... the flat of his foot was growing, lengthening. The sounds of popping tendons and reshaping bones was horrifying, and yet he could not look away as his feet became too large for his shoes, finally bursting out of the front of them, black claws tearing the fabric apart. The remains of his shoes and socks fell away, revealing his new wolflike appendages.
"If I can just... get out of here..." Greg crawled to the front gate of the zoo, the doors closed, cold bars blocking his way out. "Someone... someone help..." he said weakly. "I'm... burning..." His hands holding the bars began to twist, claws ripping their way out of the flesh of his fingers, hair racing up his arms. He looked up at the full moon and screamed in terror and pain as the virus flooded his body and he knew with terrible finality that there was nothing that he could do.
His body glistened with sweat as he fell to the ground, breathing hard. The sounds of change filled the air, and he reached back to desperately push down the seat of his jeans to allow the thin, fleshy tail that was protruding and elongating above his ass room to grow... the pain was just too much. Fur began growing in earnest, every hair a lance of pain and pleasure lighting up every pore of his body. "NOOOO!" he howled, his voice sounding deeper, tortured, as he struggled to speak past his lengthening fangs, his twitching jaw. "Ahr... changing..."
Just then, he smelled it. The virus invading his brain told him: FEMALES. Two pairs of amber eyes blazed in the darkness... the two wolf bitches who had infected him. No, Greg thought... anything but that... the smell was accelerating his changes. His tail twitched eagerly as his wolfhood... no, manhood! he thought... swelled so large it threatened to burst his jeans. The two female werewolves padded closer.
"Pleahse... hhhelp mhee... or k... khill me..." pleaded Greg. I don't want to be a monster, he thought! But at the same time, his mind wouldn't let him look away from the beautiful female monsters... each of their six generous, furry breasts begging him to suck... their desperate, virgin pussies yearning only for his cock.
One of the females reached him and grabbed his sweaty, transforming body by the waist. As she lowered her fangs to his throat, Greg thought: Thank God. She's going to put my out of my misery.
But instead of biting his throat, Greg felt her lupine tongue invade his mouth. His eyes wide, he felt the virus surge within him as more viral agents entered his system, compromising him completely. "AAAIIIAAIGHHH!" he screamed as the burning increased, and the virus began to take over his mind.
The second she-wolf grasped his legs and, using her teeth and claws, ripped apart the waist of his jeans, pulling them down around his ankles and exposing his lengthening, thickening, reddening cock. Wrapping her muscular arms around his backside so he couldn't escape as he twitched and bucked in the throes of his change, she began to lick it, panting as she watched it grow, her talons combing his now-bushy tail.
Finally, the virus turned its attention to Greg's head. He felt his face pull out, millimeter by millimeter, his tongue lengthening, his teeth sharpening as all traces of humanity began to leave him. "NOOOOOAAAAAAAAAGHGHHHHHHHHHHH!!!! ARRRRRRGHGGHGHH! RRRGHGHGH!" And then the human was gone, the skull of the wolf pressing his brain into a simpler shape, forbidding thoughts about things that didn't matter to a wolf.
The newly-corrupted werewolf opened his eyes and saw two wanting bitches, their heat-scent invading his reality. One of them was already licking his tool. He grabbed her, throwing her down on all fours and settling down onto her back. Sinking his teeth gently into her neck, his strong, taloned hands finding and kneading her many breasts, he finally plunged his cock into her waiting vagina, making her whine and yelp with pleasure as her heat was finally answered by a male's lust. Her sister-wolf began lapping excitedly at their coupling. The wolf that was Greg felt a knot begin in his penis, inflating his organ and locking him within the female as he began to give her his life-giving seed, causing a nearly 15-minute-long howling orgasm to both of them that left the female nearly unconscious with pleasure and fulfillment. As his knot deflated, he turned to see the second werewolf bitch on all fours, her tail held to the side, in a submissive posture. He grasped her body, held her against the bars of the zoo gate and proceeded to take her completely, ramming his organ as deep as his heavy balls would let him.
Back at the polar bear exhibit, Brenda lay on her back. The white werebear had finished taking her for the fifth time, and she licked her ursine muzzle as she heard Greg's tortured screams and then pleasured howls echoing through the zoo. "Come to me," she growled, rubbing her furry stomach, which, below her eight breasts, was beginning to swell outward visibly with the products of her matings...