Bump in the Night

My room is next to my parents. They are in their middle 40's. At least 3 nights a week I can hear them having sex. It's like clockwork. Midnight and the action starts. I'll hear a minute of whispering. Then some giggles. Then thump thump thump grunt thump thump thump grunt. There is a soft moan mixed in with that. I've grown accustomed to rubbing myself to settle the tingle between my legs. The whole deal lasts about 5 minutes.

There is a series of a rapid thud thud thud thud and the soft moan is a low squeal. It will stop suddenly and there is a loud grunt. Then a quick little thump thump. I rub myself according to this rythmn. I orgasm about 2 times. I could only imagine how many times my mom has her orgasm. I've never led on that I can hear them. This is free in house porn for me. I've been brave and sat outside of their closed door. I can hear the smack smack smack sounds, but I'm afraid the door will open and bust me. I'm safe under my sheets. It turns me on to imagine the position they might be in. This room was my older brother's room. I bet he's heard an earful during their younger days.