When Lilia broke off the kiss it took only a moment before Kay pulled her back in for another one. The two mermaids made out, fondling each others breasts. Gisela joined as the trio kissed and groped in the hot tub. Kay's doubly transformed body burned with particular desire and Lilia saw it in her eyes. She began working her way down Kay's body with her mouth. Gisela followed suit and soon each had one of Kay's breasts in their mouth. Kay nearly orgasmed right there, having never before had such sensitive parts of her chest.
The two sirens released their prey and conferred on their next move.
"This is actually my first time with other women" admitted Lilia.
"Then let me do the honors" said Gisela with a smile.
Her head dove under the water and she began planting kisses around Kay's scaly groin. Lilia returned to making out with her former boyfriend and soon Kay had tongues slipping between her upper lips and her lower ones. Kay lay on her back in the hot tub, making out with one girlfriend while being eaten out by the other. None of the three mermaids needing to come up for air from their underwater tryst.
Fear began to build in Kay's mind as the orgasm began to build farther down. Had Lilia told the truth - was Kevin about to become Kay permanently? All Kay had to do was ask his mermaid lovers to stop. Lilia was surprised herself - she had expected much more reluctance but she had been born a mermaid and its pleasures were normal to her. Gisela knew better, realizing how horny she got as a mermaid, especially after her first transformation. She knew Kay wouldn't want to stop as Gisela used her tongue like the expert she was.
Finally it began, Kay's body convulsing with pleasure, Gisela driving her on, orgasm after orgasm, until Kay's exhausted body finally stilled. Lilia and Gisela released Kay who could only mutter a few "ohmygods"
"You gave Kay quite a ride" said Lilia.
"What can I say" said Gisela with a wicked grin. "I'm a master of many tongues."
"Show me..." asked Lilia.
-----
After some more fun in the hot tub, the mermaids made their way to the nearby pool. They slept and played and pleasured until the next evening. The three were reclining on pool chairs when Kay felt something strange. She'd had lots of tongues and fingers in her for the last 24 hours, but now something felt like it was coming out. Her tail started to lose its color as well and Kay realized she was transforming back into human form. Her scales began to fade into skin and her tailfin split, her legs parting like a slow zipper. Something was now poking out of Kay's slit for sure. Feeling her chest, she found it deflating. Soon Kay was once again Kevin. He gave his dick a gentle squeeze, having been unsure if he would ever see it again.
Kevin sat up and looked at Lilia. "You knew I'd go back to normal, didn't you? You just wanted to scare me?"
"I hope you learned a lesson not to mess with mermaids" said Lilia. "And hopefully had some fun."