"He's got a nice ass doesn't he?" she asked."HUH? What? I wasn't looking." I fumbled."I saw that look," she said "It's the same look I get when I see ... nice ass or a nice package. Hey Jim, Jack here thinks you've got a nice ass." To emphasize her point she smacked his ass, and it sounded really firm. "Come here Jack," she said, "come feel his ass." I wasn't sure, I hesitated, she walked over and pulled me to Jim. "It's OK, he likes having his ass played with. Go ahead touch it, squeeze it,. Her reply surprised me because it was "Why not continue?". My sister was asking me to masturbate to ejaculation! I liked the idea and continued jerking off until, in full sight of my sister I shot my cum on to the grass. Looking back I still wonder what on earth was happening to us. Until that day we hadn`t seen each other naked yet here we were with her telling me to ejaculate for her and me willingly doing it. At the time I didn`t think of the rights and wrongs. I often masturbate but doing. Brother, he knows i'm curious about sucking off another guy and I'm going over to pick up some pot knowing that this could happen. I think it was the excitement of knowing i'm going to be sucking a stranger, being spontaneous. This is how I know he set me up. I walked the 2 blocks to pick up my "weekend partiables" and like every other time I go see him I just knock once and walk in. Thats what I did and when I walked in I stopped dead in my tracks. Sitting on the bed was my friends brother,. The boys didn’t realise it, but Sean and Lee had been privy to their thoughts as well. Lee soon found a rock-hard cock up her arse. Kyle and Sean soon found they were in sync. They linked and enjoyed egging each other on.They were teasing each other about if they were in revered positions. That it was Sean in Tony’s tight arse while Kyle was in Lee’s. Kyle even projected what he was feeling at Sean and felt his reaction as Sean’s cock stiffened even more at the thought of feeling it for.