Nikki tried to calm him down. "Stop. I'm not ready for this."
The man seemed angry. "I need to fuck something!!!"
Nikki thought it over. "Okay, then we'll try this." She carefully eased herself up, took his 14-incher in her mouth, and started gently sucking on it. The man seemed to like it and began thrusting deeper into her throat. Meanwhile, the nub of a dorsal fin on his back kept growing, and another lump appeared around the base of his tailbone.
Nikki could feel the skin on his hands beginning to feel like rubber and turning a light-darkish gray color. His penis was swelling up in the back of the throat, getting bigger and longer, and leaking a thin stream of pre-cum down her gullet. She tried to pull away, but the man held her back.
"Please, I need this!! Once I cum in you, it'll complete my transformation! I'll become one with the ocean, and then I'll never have to leave!!"
He kept talking, but that was the last intelligible thing Nikki heard him say. His voice became high-pitched and started coming out in whistles and shrieks. She watched in shock as his face stretched out, nose and mouth merging into a long snout. She saw a big, rubbery tail dropping behind him, flopping around on the sand. He had completely turned into an anthropomorphic dolphin man!!!
Nikki didn't know whether to try and fight him off or keeping blowing him. But it didn't matter. She could feel his penis pulsing. Suddenly, he let out a great shrill cry as his sperm came pouring out like someone had shaken a bottle of soda. Nikki pushed it out just in time to keep from swallowing more than a few drops, and instead got showered with enough cum to give her entire body a beautifully even, shiny coating.
Panting, she looked up to see the dolphin man standing up slowly as his struggled to balance himself with his new tail. His penis was already getting even harder than before. He looked at her with his beady eyes, and it soon became clear to her that his body wasn't the only thing more animal than before. She had to think of her next move fast, as he began to walk over to her like a flesh-hungry zombie.