Riding on a man’s lap

Because I am small, and weighed less than most of my friends, I have bounced up and down on many men’s laps while getting a car ride, but when was 16, I rode on my athletic friend’s lap and he got so hard. We were very still for a while as he grew very hard, popping out of his shorts and warming his rod on the inside of my leg. It was a long ride, and so later as it got dark he grabbed my hips, holding my butthole down on his rounded bulge. I could hear his breathing becoming more and more measured and controlling. Then I heard a catch as he stopped suddenly. I felt the wet warm cum inside my leg. It was wonderful just sitting in his cum. When we got where we were going we ran inside quickly and changed.