mother/son incest

[dpldn]

I was reading through some stories and found one called "Gee But Its Great To Be Back Home" and really enjoyed it until the end. They never had sex. I am looking for a story that is similar to this story, but they actually have sex. The thought of the mother riding on the sons lap in the back seat of the car with the dad and daughter in the front seat is great. Anyone know of some stories with this type of story line?

 

[DC29]

There was one that I read, it was about a mother and son who have sex while the father is driving the car. I think it is called the long trip but I'm not 100% certain on the title