When we all went out on Daddys yacht, we knew it would be LOTS of fun and we could hardly wait! We have sex together all the time and when step-mom took the first cock in her mouth, my step-sister and I knew we could get started ourselves! I grabbed the biggest one I could fine (my step-daddy...LOL) and my step-sister got the one next to me! We did exchange them every few minutes and then step-mom told us to do some other guys too which we did and we even licked their hot balls for them! I love it when we go out to party on the ocean and being out there really makes us all want to fuck!!