When I was a freshman in college, my older brother changed jobs. His new job required him to travel a lot and they had a two-year-old daughter, so during summer vacation, I would sometimes go to their house to help my sister-in-law and stay the night. One such night when my brother was out of town, after the baby was asleep, my sister-in-law and I were drinking some wine and joking around. I caught her standing up and started tickling her, we were both having a lot of fun. As I was tickling her, she accidentally farted and we both rolled on the carpet laughing.
When we finished laughing we were lying side by side on the carpet. We looked at each other and all of a sudden we started kissing. The next thing I remember we were both naked and she was riding me on the carpet. Five minutes later I had the most intense orgasm of my life. She was protected and let me cum inside her.
After the first one we went up to the bedroom and made love like crazy, I came in her 2 more times that night.
Until the end of that summer, every time my brother went away, she called me and had sex with me. It was really hot and incredible.
In the following years I tried so hard to sleep with her again but she wouldn’t let me.
When we were young, a friend of mine was fucking his older brother’s wife. I didn’t believe him when he first told me, but a week later he showed me a photo he took. In the photo, his older brother’s wife was sucking my friend’s dick.