People on here talk about messing with their mothers, sisters, etc. I am no angel, but I would never do that with a blood relative. However, when I was 20, my mom had this very close divorced friend who was around 45. Not really strikingly attractive, but a nice slender body. I sometimes gave her passing glances, but I was not into older women. I had a girlfriend at the time who was taking care of things. One weekend mom's friend stayed with us. Sat morning my mom got up and went to work, leaving her friend and me alone in the house. I was asleep and next thing I know this woman is in bed with me, totally naked, rubbing her self against me. I have always slept naked. She then threw off the covers, straddled me, guided it in and started riding me. Surprised I was, but what horny 20 year old would object?? Well, the long and short of it is we played around for an hour or two, never saying a word to each other, other than the normal grunts and moans during sex. That evening when my mom got home and the three of us were having dinner, her friend wouldn't even look at me. She seemed totally embarrassed. Later in the evening when we were alone for a moment, she apologized and said she didn't know what came over her. I said, don't worry about it. We both enjoyed it, no harm done. My mom will never hear of this from me.