Jess slowly lead Todd to the bathroom, slowly and seductively letting her robe slip. He followed her eagerly, taking of his shirt. As she entered the bathroom, she finally let the bathrobe slip to the floor only to tantalizingly slip out of sight behind the shower door's privacy glass a moment later. The last of Todd's clothes were on the floor just before he opened the shower door.
Jess stood under the showerhead letting the water seductively cascade down her body. Todd bent down to kiss her stomach, noticing her hips seemed wider. He considered moving downward, but decieded to work his way up her torso instead. As he reached her breasts, Todd was certain they were larger than ever before; Jess had been a B but now he guessed D if not DD and still looked all natural. Not that he was complaining. He worked his tongue over her erect nipples before continuing his string of kisses her neck and finally their lips met. Their eyes met as well and Todd noticed they were a shade of blue-green he'd never seen before. He guessed new contacts.
Todd pressed Jess' back gently against the shower wall and entered her. Jess moaned with pleasure as she reached up with one hand to adjust the showerhead so the water continued to rain down on their lovemaking. Todd felt Jess' nails dig into his back. He didn't remember her nails looking very long when he arrived and she'd never clawed his back like this during any previous lovemaking. Jess' moaninig grew louder, to levels he'd never heard before. Her legs began to feel odd against his, almost like rubber or latex. Jess seemed to slip; she clung tigher to him and he slid his arms between her back and the wall. Were her legs growing weak? A minute later and Todd could feel something against the back of one leg then another. He figure Jess was wrapping her legs around his for support although it didn't feel quite right.
They both climaxed at last, and none too soon as Todd's grip began grow weak. He slowly helped Jess slide down the wall till she sat on the floor of the shower. Her face was aglow with delight.
Todd stepped back and his eyes grew wide with surprise. Jess' fingernails were now longer and sea green, which they definitely had not been when he arrived. But more important than her odd nails, her changed eye color, and her enlarged breasts was a change it was beyond impossible to have missed: instead of legs, Jess had a tail! It was green and looked like it was made of a material that was somewhere between latex and the skin of a dolphin. The way she bent the tail it was clearly not fake, not that she would have been able to put one on in the shower during their lovemaking. His girlfriend had turned into a mermaid!
As Todd stared in amazement, Jess looked herself over. She looked exactly like she did the day before when she had the mermaid costume on, except this was no costume!