One of my favorite sexual experiences with my sister was a time we offered to go out and get pizza for the family dinner. We jumped in my SUV and started driving to the pizza shop intown. It was a new pizza shop we wanted to try, and my sister and I didn't have a menu so we were going to order when we got there. We decided to pull off on the one dirt road on the way to the pizza shop. I put the car in park and leaned over the console and gave her a kiss. We slowly made out in the front seat before climbing into the back seat. I already had them laid down to maximize our usable space. We climbed into the back and continued to make out, we slowly undressed each other till my sister and I were down to just our socks. I vividly remember her mismatched ankle socks over her head as I went in and out of her and she kissed me back. I felt myself cumming inside of my sister, and she wrapped her legs around me and pulled me tight as I dripped into her pussy. She gave me a kiss and said let's go get dinner. We got to the pizza shop and ordered and headed home after they brought it up. Our parents made a comment about how long it took, we just told them the pizza shop was busy. It would be years later until they found out the activities my sister and I used to do with each other.