I 28[M] fucked my wife [29F] in the front seat of a pick up truck driving through a crowded pedestrian area. The driver and other passenger wound up fucking each other

This happened in 2010. I was at a birthday party for my (now ex-)wife with some friends. Her childhood best friend came, and brought a guy along for a first date. There were several other people as well, but they aren’t part of this story.

We started with a nice dinner and bar hopping for some drinks. Probably too many drinks, but we were all having a good time. As the night went on, we decided to head over to a club on the other side of town. We wanted to minimize cars, and not all of us should have been driving at that point, so wife and I ride with her best friend and her date. Only, he was driving a large pickup truck.