[M]y first time have car sex

Some back story. I'm in a long distance relationship with my girlfriend, she is 21 I am 22. I live in New York and she lives in Chicago where we are both from. We have been dateing for 5 months. Our sex life is the best. She has told me that no other guy has has given it to her like I have, and I know she means this because she was my first, so she is always telling me how completely surprised she is at how good I am. Now on with the story.