You feel yourself bursting with a newfound strength as the first moonbeams hit your skin. You don't notice the line of fur running up your back, but you certainly notice the fur blossoming on the girls, and it's just as much of a turn on in real life as it was when you saw it in movies, possibly more.
Marsha looks up at you, her fangs protruding from her mouth, and you watch as her ears grow pointed, pushing through her long black hair. She runs her nails, her ever-lengthening nails, down your thighs, thighs which are now blossoming fur as black as hers, and you realize what's been done to you. "Change with us, loverrrrr," Marsha growls, her yellow eyes blazing in the light from the moon.
Lisa snarled at you, licking your chest, "Yes...grrraagghh...chhannggeee," her voice modulating deeper. Part of your brain is still rebelling against the transformations you are undergoing, but the girls, and the lust began to push a more animal side of your mind to the front.
She'd grown a fine coat of red fur, but her breasts hadn't shrunk at all, if anything, they'd grown slightly larger. Justine crawled across you, in the throes of her own transformation. The tremors and heat of her body further caused your own change to intensify. Your muscles swelled, and you were aware of an intensely pleasurable sensation as your cock began to get overgrown by a sheath of skin and black fur. Trails of her cum ran down your chest as she crawled, moaning and grunting a primal, gutteral, passionate sound, wordless in the throes of her change. But it wasn't you she was interested in this night; it wasn't for your benefit that she crawled across you.
She rolled off of your body in an unceremonious, ungraceful motion, struggling to make it to Lisa's quivering muff, and Justine buried her face in it, her nose blackening. Lisa let out a scream-howl of undeniable pleasure, her own head snapping and stretching into a far more lupine one as she grabbed the scruff of Justine's neck, grinding her pussy against Justine's muzzle.
The smell of bitches in heat is all around you, and your red rocket emerges from its sheath. Marsha is now fully a werewolf, and she rises in front of you, before turning her back, dropping back to all fours and raising her ass in the air. Her tail raises high, and you can tell she's ready to be mated.
Instinct takes over as your final changes commence, and you slam into her without a pretense of foreplay, but then again, the change has provided all the lubrication any of you might need. The mating is more intense than anything you've ever felt, the sensations tenfold of any human lovemaking you've ever done, and it's brutally short. You find yourself stuck inside her for a minute, but then you separate and rise to your hind legs.
The three shewolves surround you, licking your fur clean and nipping at your face and chest. "How do you feel?" The Marsha wolf asks, speaking in the language of the werewolf.
"Hungry," You respond, the words falling out of your muzzle as naturally as if you'd spoken them your entire life.
"Come," Marsha said, "It's time to hunt." She raised her head and howled, and the other shewolves followed suit. Then instinctively, you did as well, and the four of you took off at a dead sprint, sniffing the air and ground, searching for prey.