"Journey's End" by Sven the Elder (sven@brass-neck.demon.co.uk).
http://x10.dejanews.com/getdoc.xp?AN=344151888

Sometimes I get the Impression that when Sven the Elder was Younger, he was one hot guy! Maybe he still is.

In this story Sven is riding home in a crowded car from a dance. Seated securely on his lap is a somewhat older girl who is not his girlfriend and with whom he has never shared any mutual interest up to this time. Something pops up, if you know what I mean . She jockeys for position; but before they consummate, the ride is over. No problem; she asks her Dad, who is driving the car, to swing by and pick her up after he drops off the other kids. For the next twenty minutes they have a hot time on a cool night.

This is a very good story.