When I graduated high school I attended a community college where my older brother lived. He was 6 years older than me, married with 2 small kids. My parents gave the money for letting me stay with them and I helped with the kids. The arrangement worked well. My sister-in-law was 5 years older than me. She was a little chunky after just having 2 kids but really looked attractive. I slept on the couch and could often hear them having sex. I would get up often and go to the bathroom to get relief. One morning I needed to borrow something from the master bath. My brother was in the shower and my sister-in-law was naked on the bed on her side. I eased over and could see her shaved c**t. I couldn't help myself so I dropped my shorts. I straddled one leg and put my hard cock in her. After a few strokes she woke up and rolled on her back. I continued a short time then I cum inside her. She pushed me up and told me to get out of her bedroom. That night after school and work she privately cornered me and told me to never take advantage of her again. I felt quilt. The next week I was asleep on the couch when I was awaken by her sucking my dick. She got on top and milked me dry. After this we had sex a couple of times a week. I have had sex with 4 women and my sister-in-law is the best I have had. I could never last long in her. My wife and I live out of state but at family get together we try and usually sneak off for sex.