Mary lay near the pool still in her dolphin mermaid form. She could see John in the pool, could see that he'd drank from a vial, and could see his upper half was still human. But what about his lower half she wondered? He got near the edge of the pool closest to her, still having not revealed his form.
Suddenly something long and flesh lunged out from the pool and wrapped around Mary's tail, just above her tail fin. She tried to sit up to see what it was but it tugged her closer to the pool, knocking her back on her back. What was John doing?
She felt something else again her tail. She tried to sit up again and managed to see John smiling at her, something still wrapped around her tail, and something else touching her tail. Something long and fleshy. But then another tug toward the pool knocked her on her back again. They were gentle tugs: just enough to cause her to fall back from a sitting posistion but not hard enough for her to hit her head against the pool deck.
She felt the thing against her tail sliding up it then along her stomach, which made her swirm with delight. She propped herself up on her elbows and could now see the fleshy thing sliding up her chest. It was clearly a tentacle of some kind and it appeared another was wrapped around her tail, holding it down and bringing her closer to John and the pool.
The tentacle wrapped around her right breast and squeezed gentlely, the tip of the tentacle rubbing against her nipple. It was a pleasant sensation, even thought it was a tentacle, almost like a hand and a tongue. The tentacle released her right breast then gave her left breast the same treatment. Then it drew back, leave both breasts rock hard. The tentacle slid back down Mary's stomach to the upper part of her tail.
The tentacle wrapped around her tail tugged her closer to the water again then the other tentacle that had massaged her breasts began to rub against her vagina. Mary didn't try to sit up anymore, just lay there with her arms wide letting the tentacle rub against her. Without warning it stopped rubbing and slid into her. It was like nothing she'd ever felt before and she was immediately moaning with pleasure.