This story happend few years ago with a girlfriend that eventually cheated on me. I wrote a hot story about that too. Check it out if you are interested.
So, a month after we met and got together she agreed that she will come to my city so we can see eachother and have sex. She took her fathers car and promised that she wont make any trouble. He was kind of an ass and she had to be extra caucius with the car. She picked me up in the evening that night and we agreed to go to a lake and a woods that is famous for people coming there with cars and fuck inside them. Or on them. So we found a nice spot so noone can disturb us and we have some beers and smokes.