"Transform!" Peter said, swallowing. He was no longer resisting, but he still knew what his situation was. "Please, don't kill me. I just want to-."
"Sssshhh," Robert said as... she placed a long claw across Peter's lips. Then, she reached down and with a thrust of her hips, inserted Peter into her. "Enjoy."
Jennifer stood in horror seeing the female press herself up against the younger boy. After regaining her wits, she moved closer, but then she stopped when she heard Robert start to speak. She didn't dare miss what he... she said, or interrupt. She might make things worse. "You will become an extremely healthy and beautiful male lycanthrope," she said. "You will change, at the very least, every night and every time you mate. You will change into the perfect example of our breed. You will be extremely virile, even from this act you will give me children. You will be a wonderful lover, skilled in all of the ways to both give and receive pleasure." She paused long enough to bite softly down on the young boy's arm. Peter moaned as the gyrations began to increase. "You will be perfect in all things. The perfect alpha. The perfect lover. The perfect hunter. The perfect... oh... everything." Jennifer winced. There was nothing of Robert there, just the perfect mating machine she created.
Just then, Peter suddenly thrusted his hips up and into Robert in a quick odd fashion. Robert's eyes widened in shock and she gasped loudly. "Fine," said Peter, looking slightly angered. "Then enjoy this." He reached up and somehow grabbed Robert's arms. In a sudden motion, Peter tripped the beast from a standing position, dropping her onto the ground. Then, as Peter body quivered, the boy leapt down on the animal's back and mounted her from behind.
"Peter," shouted Jennifer. "What are you doing?"
"Fulfilling the curse," Peter said as his teeth started to extend. Even though she was much larger than Peter, Robert began to moan with pleasure. "I have to. I'll figure things out after. Ohh." He closed his eyes in ecstasy, but upon opening them again a few thrusts later, they had turned as golden as the sun. Then, in short bursts, his body began to grow.
The smell of the act filled the alleyway. Jennifer inhaled it, and once again she wanted to mate. Outside of the alley, Jennifer saw one woman eye a man who was slowly coming to, one she hadn't even been previously paired with, and she instantly mounted him. Even though only her ears had physically changed, the animal within her (whether it be the wolf or the human) desperately wanted to mate again.
Before she could move however, Peter cried out as his own transformation continued as a vastly accelerated rate. He continued to thrust his hips, and at one point he stretched his own arms out. The bones stretched and distorted along with his fingertips and nails. Soon claws where dragging along the bricks to either side. Silver fur sprout from his face as if he suddenly decided to have a five o'clock shadow, but it didn't stop there.
And Peter continued to grow and thrust and grow and .... Jennifer wanted him in her.