I stopped stroking. I had too. She was walking towards her window. I was stunned. Could she see me? Could see me naked and hard? God, this was a... dream come true.Over to her window she walked. Her nakedness followed her ever so sensually. Once in front of the window, she smiled and pointed. There was my answer. She could see me! She knew I was naked and hard. Slowly, she spread her legs a little. I could see the outline of the muscles in her strong legs tighten. Furthermore, I. I had my back to my sister and realized I was going to have to let go of the towel to put the shorts on. I thought about going back in the bathroom to put them on but then thought “what the hell, I saw her ass, now she can see mine” and dropped the towel and bent over to slip the shorts on.“Nice ass and dick there bro”, Cam said, then gave a little wolf whistle.Shit, I didn't even think about her being able to see my dick hanging down between my legs as I bent over to put the shorts on. I could. After the dinner Bibi put on some music, and put on a strip show for Danny, finishing her performance with giving him a lap dance, wearing only her sexy black stockings and high heels. Bibi was pleased when she felt his crotch, and found that his cock was hardening in his pants. (Danny doesn't have a big cock, but it's not too small either. Probably quite average, and Bibi is content with that).When she felt his growing hardness in his pants, she got excited, and pulled him into the bedroom,. We’d had an adventurous sex life since we had married in our mid-twenties, more than thirty years ago. We tried almost everything, usually with Sandra leading. She tended to be dominant when it came to sex. I wasn’t really submissive, but I wasn’t as daring as she was. She enjoyed practicing bondage on me and we’d had many tease and denial sessions usually lasting an entire weekend before fucking like crazy all Sunday night. I almost always gave her orgasm after orgasm during those wonderful.