I told her that it was her turn to masturbate for me. I told her right where she was. She laid back and asked me what to do. I told her to pretend tha... she was alone in her room. I then told her that I was going to walk up the trail a little ways and watch her. I left and she started her show for me. LOL. And the others that I was sure would be watching. She put a pillow under her head and pulled her legs up so her feet were up to her ass cheeks. She spread her legs wide and played with. So the guys leave and after an hour there is only me paul and another friend - who can talk for England- left . Eventually after a lot of yawns etc my friend gets the hint and leaves with paul. I start to tidy etc and after ten mins I can hear a phone, so I go and answer it and its paul calling his mobile from my other mates phone. Of course I thought. Now he has an excuse to come back. So a bit later he comes back. As soon as hear him knock my dick got hard. He came in and we went to my room.. She went back to the dance. Soon a slow dance began.I thought she might leave the dance floor, but one big solider held her tight. She continued to dance with this big lad who was now dry humping her as they danced.I could see him groping her ass. She looked up seductively into his eyes and he started to kiss her. Not just a peck but his tongue deep into her mouth. He was very forceful. I could see Sharon's tongue meeting his tongue long and deep. I could see her wedding ring flashing in the. She stumbled to her dresser and opened it and I turned to leave the room. That's when she said you dont have to go, I'm your sister, we are best friends and we dont have shit to hide from each other. I agreed and then asked if she was interested in a glass of water or another beer.She yelled in a very intoxicated voice with a drunk laugh and said "yes another beer". Just then her shirt came off and seconds later her tight fitting jeans had hit the floor before she even got her shoes off. I told.