Mother and father called me and asked if me and my wife wanted to go with them to Las Vegas. We both said yes. It was going to be 7days with my mother and father. On the first day we were having breakfast and we all decided to go our own way and do whatever we wanted to do. So right after we split up I saw my wife and my father going up stairs together. I follow them up stairs and they went into my parents room together. There was a door between or rooms and I just happen to unlock the door when we got there. I opened up the doors and heard my dad telling my wife that she was so much better at s** than my mother was. I heard my wife telling my dad that he f*** so much better than me. I was taping the hole thing and they never knew I caught them red handed having s**. I went and found mom and showed her the tape I made. I told her not to get mad but we needed to get even. At first my mother said no but she gave in to me and her having s**. So me and my mother had s** everyday in a different hotel. We had some great s** and did after I got divorced from her, and after my dad past away.