The guys would buy something that could be used as an erotic toy or enhance sex play and gift-wrap it up as a present. When we met for dinner (aka, 't... swap wives') someone would bring along a holdall that contained all the various packages and the wife would have to pick one or more gift with no idea who brought it or what it was. The guy who bought the present would have written his name inside the wrapping and the wife would then become his partner. After the present was opened she would. We went to the theatre and took the platinum ticket, as not many people would go for platinum seats due to high cost and that for animation movie in morning show. My sis was really excited, she wore knee length skirt and tshirt. We entered the theatre and movie started. The movie was about 90 minutes lenght and we had decided to enjoy the most in this time.We took corner seat and as movie was 2 week old, very few people were there. Our row and 2-3 rows in front of us was totally empty. We were. I started to gulp down the glass of wine whilst at the same time looking out for the toilets and also to see if I could see the man who had been sitting next to me, I spotted him and his family sitting at a table in the middle of the bar with his back to me chatting with his wife who was smiling and laughing with him, I was a little taken aback because I felt that his world should have stopped and waited for me.Having finished my drink in record time I hurried to the toilets which was busy. It was getting dark, and to my surprise the lights were on in the room. Suddenly, I heard my sister giggling in the living room. I slowly crept to the half-opened curtains and peeked inside. The scene on the bed made my heart stop and my cock stiffen. There was my beautiful sister, Asif (one of her collage mate).I had a perfect view of them sitting on the couch. He had his arm around her shoulder. His hand was already down her blouse. Playing with her ample tits. She was playing hard to get..