I was naked now and felt a sensation in me, i was nude and another woman could see me and i could see her naked. A situation that in adult life would...lead to one thing.as she put her costume on I wished she would turn around so I could see her pussy in full but she did'nt. she put her costume on, then she asked if I was ok and had everything i needed before we went to the lockers. I had put my trunks on by now. We went swimming and then when we had finished went first to some showers, were we. "Is she talking to us?" I asked Kris. "I think she is, " she said looking behind her, "I don't see anyone else behind us that she could be signaling. "I wonder what she wants"."Probably a more close up view of that hot body of yours" I teased. Kris slapped at my hand playfully. "What should we do?" she asked tentatively. "I guess we should go see what she wants" I said then wondered silently what we were getting ourselves into. We turned and started to walk hand in hand over toward the far side. You`ll cum. Go ahead and do it."I wanted to continue, but in front of this girl I`d never seen before this? Eventually I decided to do what she asked. I would masturbate until I ejaculated (which I wanted to do, anyway) but what about her? I would be naked and she only partly so."If I`m going to be complely naked again when I do it I think you should be, too," I said."Why not? I`ll do it. If you hadn`t been here I would have stripped off, anyway," and she pulled off the lower part of her. They were not gentle slaps, they were hard enough to hurt a little, and to make your skin bright pink.Fucking you from behind, your fingers working your clit, I continued to slap you like that, and you continued to get closer and closer to the edge of cumming, each slap a little bit of pain that enhanced the pleasure of our fucking.“You like it when I slap you hard?” I asked, my own arousal extreme and my own orgasm not that far away, yet intricately linked to yours.“Fuck, yes, slap me again..