I went on a road trip with my girlfriend (We were both 18) Until this point, we hadn’t had any sexual relations. Her parents were very strict and in her head with waiting until marriage. Her sister and brother were in the 3rd row, we were in the middle and her parents were driving. While on the road trip we were covered with a blanket and all of the sudden I feel her hand rubbing the inside of my leg. As I look at her, I could see in her eyes, for some reason she was so turned on. She unbuttoned and unzipped my pants. I looked at her confused wondering what she was doing. She wasted no time and pulled my dick out. She whispered in my ear how shocked she was because the head of my penis is so thick. She started jerking me off and rubbing my balls while having a conversation with her parents. I decided to reach over to unbutton her pants and they were already unbuttoned and she was already wet from playing with herself. I could barely fit a finger inside of her. It didn’t take long before I shot cum all over the blanket and she had a very quiet orgasm trying not to be caught. After this incident, it unleashed us both. We had sex on her parents couch while they watched a movie, sex in a few other secret places.