Craig and Tessa began making out, Tessa on her back and Craig on top. He caressed one of her froggy thighs as they kissed, which helped get the frogwoman more turned on. Yet as much as she desired sex, she felt an even stronger desire: to return to the waterfall pool. It began to crowd out other thoughts. Tessa couldn't take it anymore. She caught Craig off guard, rolling the two of them over.
"Froggy wants to be on top?" he asked playfully.
Tessa gave him a final deep kiss then turned and bolted for the water, her new legs giving her a slight jump start.
Craig stared bewildered. "Was it something I did?" he called after her as she waded in.
Tessa turned back to look at him, already waist deep. "I want you, but...the water is calling to me. I feel the need for this for reasons I can't explain." Having been turned half into a frogwoman she felt completed to transform further.
She backed deeper into the pool, feel the water against her stomach. The plunge pool didn't get much deeper so she squatted down on her frog legs. Craig stood and watched as she sank into the water up to her neck, the silvery moonlight dancing around her head on the surface. Tessa could feel the change, a strange sensation of her skin crawling up from her waist. She knew it was her frog skin spreading up her torso as whatever magic was at work here changed her. As the change reached her chest she let out a surprised but pleasurable yelp. She felt her breasts which seemed to have become a little larger, firmer, and more sensitive. Even as she caressed them she could feel webbing spreading between her fingers. She held up her hands, fascinated at the way the moon shone through the membranes.
Feeling her changes complete, Tessa stood back up, giving Craig a view of her changed form. The dark green of her legs now covered her whole body below the neck, except for a lighter green from her waist to just below her breasts.
"Do you still think I'm beautiful?" she asked.
His response was to wade in toward her, more erect than ever.