Back in college my girlfriend was a complete freak. She loved public play and having people watch. My family took me, her and my other family on a vacation. We were driving back from a day of skiing me and my girlfriend were in the backseat with a blanket over our lap when I feel her grabbing my cock through my sweatpants. This wasn’t a big car it was a sedan. I look at her and look at my parents and look back at her, she bites her lip and gives me a sad puppy dog face asking to please play with my cock. How could I say no. I slowly nod and she starts to slowly stroke my cock up and down and grabs my balls and plays with them. I’m trying to act as normal as I can. She starts to stroke faster and play with my head driving me crazy. It was torture sitting there not able to do anything but hope my parents don’t notice what’s going on. She takes my cock out of my sweatpants and really starts to stroke it. I am doing everything I can to not cover my parents blanket in a load. I look over at her as I reach my hand to her crotch and feel her extremely wet pussy. I start to rub her lips and she bites her lip again this almost makes me explode that damn lip bite would get me to do anything. I grab her hand away from my cock and tell her we will finish this later. That night we had some of the most explosive sex ever. I always wonder if my partners ever thought I was getting a hj.