Lana sat in the jacuzzi with her legs wide, glancing back and forth between Amy and John, wondering who would start with her first. Lana felt a hand on her thigh, then a hand on her other thigh. This seemed strange since neither John nor Amy had moved any closer, although Amy had a mischievous look on her face. Lana was about to say something when she felt a third hand between her legs.
John was likewise wondering what Amy was up to when he felt something slowly wrap around his tail. He didn't realize what it was until the second tentacle wrapped gently around John's erect penis and began gently stroking it.
Lana realized what was happening about time the two "hands" had encircled her thighs and the third appendage was teasing her vagina.
"A mermaid...octopus?" Lana asked curiously.
Amy nodded. "I hope you don't mind?"
Lana smiled. "When am I ever going to get another chance to experience tentacle sex?"
Amy slid her tentacle slightly into Lana. "Oh...that feels so weird... I like it..." Lana took the tentacle with her hands and began guiding Amy's probing. Amy bent another of her tentacles back to pleasure herself while she pleasured Lana and John. Once Amy had an idea of what Lana liked, she let go of John and pulled her self into Lana's lap. Amy slowly moved into to kiss Lana, the girls' tongues entwining while their hands grasped at each other's breasts. Amy continued to probe deeper into Lana with a tentacle.
John was left watching this girl-on-girl action for a moment then pushed across the swirling waters of the jacuzzi. He wrapped his arms around Amy, kissing her neck. A tentacle guided John into Amy then two reached back around John to help his rhythm as the trio worked toward a mutual climax.