They were naked in the shower. She was nervous, not about the sex, but about the changes that were certain to trigger. Soon her instincts would take over, and she wouldn't know what would happen next.

"You're sure, huh?"

"Of course," The man replied, "I think you are a wonderful person, and it's been great getting to know you."

"There's still things you don't know about me," She replied.

"Well, let's find them out," He said. He was already in the shower, slowly stroking his cock in anticipation. She climbed in, standing between him and the wall. He reached his fingers down, brushing them past her soft, blond pubic hair, and spreading apart her soft pussy lips. He guided his penis inside, hearing her gasp in pleasure as he got into a postion against the wall to begin fucking her as the shower ran. He wrapped her arms around her back to hold her and began thrusting.

She immediately began to feel tingling. It was always along her spine that the first changes began. Her back became more pronounced with muscles and a small nub formed at the base. Her skin darkened, small bright red spots were appearingalong her back. Then, her body began secreting slick mucus started that came out of every pore of her body. However, her changes were unseen to her lover at the moment, and the mucus her body was making was being washed down the shower drain. At the back of her head, she was wondering when he would notice. She never liked when they were afraid. When she detected fear, she would become a predator. It would never end well.

The man was finding enjoyment from her apparent twitching and squriming. He felt lots of her muscles contracting, which he at first thought were small orgasms shooting through her body. He then reconsidered what he was hearing. Something was happening, strange sounds began eminating from her body between each thrust, what he thought was cracking or snapping. He took the time to focus on what he was looking through the shower stream.
It was when he noticed her skin becoming black with red spots and her face was contorting the man realized that what he was intimate with wasn't human anymore. At any other time, he could have been shocked or afraid. But the deep throes of sexual intercouse and the pleasure it derived gave him a strange reason to fully trust this creature chagning before him. It's shape might have been different, but he still felt the same sense of trust he had for her as the human woman he had met earlier.

"What are you?" He said, not with horror or disgust, but with a perverse and pleasant curiousity.

"A werefrog." She repilied buntly. She didn't have time for words. "Now fuck me harder."

He was considering a response when she wrapped her leg around his and began to force him deeper. The man began to feel the most pleasant sensation of something sticky and warm wrapping around his outer thigh. What was once a small, soft human foot was elongating, her toes speading apart as they grew longer. What felt really good was the webbing spreading between her toes, which enveloped his leg, secreting sticky secretions that kept her foot in place.

Her face broadened, long lips curled over her body, a longer tonge was hanging out. He began to kiss her neck, tasting her sweet, sticky new skin. She retuned the favor be shooting out her long tongue and running its slimy length along his neck and face. Eventrually all of her skin was a deep black with bright crimson spots. Her muscles were fully toned. Her hands and feet were large, flat, and webbed. Her pussy was tighter than ever, and both of them felt a deep connection through the orgasms there were both ready to reach. He made one deep thrust and she let out a load croak. He shot his load deep insider her, feeling all of her new frog muscles both inside and outside spasm in ecstacy. She was fully pressed agaist the wall at this point, making loud deep groans as cum slowly leaked out of her sticky pussy.

At the end, she regained control over her new body and finally managed a reply, "I can't believe you like me like this." She said with a now deeper voice. "I mean, you're not scared one bit? I'm a werefrog. Not human."

"I will admit that's it's different," he conceded, "but it felt so good, what is there to be scared of? Besides, it's not like you can help it." He then began to marvel over her new form: a black and red spotted half frog/half human. Her blond hair remained as a reminder of who she was, and even deep within her new piercing eyes, she still had the gleam of the eyes of the lovely lady he knew.

Finally, she thought, someone who understands me. "So," she started, curving her now lucious lips into a wide smile, "what do you want to do next?"

...end?