"I wish a mermaid would appear in my room," Jon said. The wishing rock glowed bright, forcing Jon to close his eyes. A moment later, he wobbled and fell over.
Opening his eyes, Jon looked down at his, or her, changed body. The reason she'd fallen was quickly evident, her legs had melded together into a long, sinuous tail with a wide fin, undoubtedly useful in the water, but equally useless on dry land. Though the luminous sea green scales were quite pleasant, aesthetically.
The tail widened to her pelvis and hips, though Jon wondered if hips were hips without legs, then terminated two or so inches below her navel in a diaphanous fringe-like set of scales that wrapped around her body like lace. Above the tail, her body narrowed to a tight waist, giving her a classical hourglass figure.
Above her waist was a large pair of what Jon's male mind could only consider boobs. They were as big or bigger than Karyn's wish altered set, and hung heavily on her chest seeming to jiggle with every small motion. Long red hair hung down from her head, helping only partially to obscure her large chest from view. All in all, Jon knew that he'd become a very attractive specimen of mermaid, and she had no idea if she could change herself back.