A couple of months ago my friend Kelsey and I were at her house sleeping over. Her parents were on vacation in Las Vegas and her nine year old brother was just walking around and stuff.
It was a hot night and all the windows were open. We went to bed in the bunk bed and my friend slept on top and I was on the bottom. After about twenty minutes the entire bed was shaking and I asked her what was going on and she said I don't know I guess I just can't keep still.
But I knew what she was really doing, and it turned me on so much I started fingering myself, and then we both knew what we were doing but we didn't care. Then the wall behind us, where her brothers bed is, started shaking and it was obvious he was jacking off.
We all had a loud orgy of sounds at once and the whole house was full of young horny moaning kids. Pretty messed up but true. It was a great sexual experience.