At first she didn't notice but when she saw my eyes staring at them she looked down at herself. She laughed and said "Oh this top never does stay up v...ery well. I should just take it off. It won't bother you will it?" I said "No, not at all Julie, swim naked if that's what you want to do." She unsnapped it and tossed it to the edge of the pool. I knew from past conversations with her that she seemed to be very open minded about sex and nudity but I had never imagined a moment like this would. .. Grinning and biting my lip at how naughty we were being I quickly tapped out a text to John 'Join me upstairs for round 2?'.As I'd suspected he didn't even bother replying, instead just turned up outside the door a few seconds later. Once in the cubicle he wasted no time in backing me up against the door, his hands roaming greedily over my body. His mouth was ferocious, moving rapidly from my mouth to my neck then down onto my breasts and back again while I reached down to free his huge. Its hard to describe the feelings I was having while I was tasting her. No matter how much I was sucking, she was getting wetter and wetter. This felt like I was doing it for hours but really only about 20 minutes. She asked me to stop because she was getting too sore. So I asked in a very low voice if she would do me what I did for her. She started to say that she was tired, but she relented and said she would do it for a little while. While we were changing places I spied my sisters ass and. .. three times!She used her mouth two of those times, and her hand again the last.Again, I don’t know whether she saw this in some porn video or what, but when she finally decided to let me inside her, she got off the bed and pulled me off too. Then she crawled back onto the bed, stopping with her knees at the edge, about a foot apart. She looked over her shoulder at me, and then let her head fall down onto the covers, presenting her pussy to me like a gift.I moved forward. The height was.