best friend asked me to sit on his brothers lap [FM]

My best friend Peter and his girlfriend Anna wanted me to come to their lake house for the weekend. It’s a super nice place in a secluded, quiet town. I was worried I’d be an annoying third wheel, but he said his brother Sam (who i’ve always had a crush on) was coming too, and I was excited.

They agreed to drive and I thought they’d pick me up in his girlfriend’s SUV, but when they arrived the were in his truck, which only has front seats and barely fits the three of them.

“Sorry, we can scoot over, I think you can fit” my Peter said as I rolled my eyes.

We tried but it was just too uncomfortable, and my friend jokingly said “You can just sit on Anna’s lap, or Peter’s.” Anna is fucking tiny, like maybe weighs 100lbs soaking wet. I’m not all that much bigger than her but knew I would crush her, so I just said “Whatever” and climbed into Peter’s lap.

We drove for a while and at first I was trying to sit on him soooo lightly, like almost down toward his knees, but the drive was long and I started to settle in slowly until my ass was fully pressed into him.