Dianna and John are on a carribean cruse, and have taken the day on shore to go to a private resort. At the restore, they meet three couples that are the same age as them, 24, and are also on the same cruise. They all end up in a private area in a pool as they are getting a little wild. Dianna is flirting with Luke, one of the other cruise people that happens to be on the cruise with his sister, Sara. John encourages Dianna to dance and grind on Luke, and Dianna ends up sandwiched between Luke and John making out with both men while their hands are all over her, with everyone else enjoying the show. Dianna ends up sitting on Luke's lap while in the pool (it is shallow), and John isn't sure if she is stroking his cock, rubbing it on her pussy, or actually riding his cock. At this point John is flirting hard with Sara, and she is stroking his cock while they watch Dianna and Luke. The venue crew eventually puts a stop to all the display of sex, and it is time to head back to the boat. Dianna is flushed and speechless, but John invites Luke and Sara out for drinks after the burlesque show that night. Dianna and John reconnect back in their room, dirty talking about everything that happened, and what is going to happen that night. They go to the show, getting aroused by the dancers. They meet up with Luke and Sara at the bar, after a drink to break the awkwardness, they start dancing. Luke making a funny comment that it would be awkward to dance with his sister, so he asks Dianna to dance. They all end up on the dance floor, and things get hot quickly. Both girls are getting fingered on the dance floor, and the girls have thier hands in the guys pants. Sara teases John about being aroused by watching Luke and Dianna. They end up back at Luke and Sara's room, and proceed to have multiple rounds of sex in front of each other. Dianna getting spit roasted and dp'ed. Sara and Dianna share a cum kiss. And Sara shares a cum kiss with John after cleaning up Dianna's pussy while she is riding John. Dianna and John end up leaving when the sun is coming up, and go back to their room and talk about what happened. After reclaiming sex they take a nap. Then story ends as they walk into the lunch room, and the whole group from the private pool are their, everyone grinning like they already heard what happened from Luke and Sara.