Stepbrother caught jerking off by stepsister who was secretly watching

Then suddenly she got over me, straddled my hips, and held my cock up as she lowered herself down onto it. XXX She had tiny marks low on her belly. I kept looking at my Aunts trying to figure out which one had gotten in bed with me. As she rose up and settled back down I could feel her breast rub against my cheek. I give him anal sex every year on his birthday.”
I said, “But you have only been married for fifteen years.”
Mom giggled again and said, “Yes but we were going together for two years before we got married and then two years later you came along.”
I asked, “Can I fuck your ass?”
Mom looked me straight in the eyes and said, “Yes, you can…and as often as you