I often heard my Parents at night as a young girl, and I admit that I would lay in bed and masturbate to the sounds, imagining it was me he was thrusting into.....I tried to time my orgasm with hers, and it felt wonderfully 'dirty' as I thought about his big hard penis pushing into me in my bed.....I often used the rubbery handle of my hairbrush to push inside myself as I heard the wonderful sounds and their bed creaking.....
My brother was a few years older than me. I had a crush on his girlfriend and after school when parents weren't home they would do it in his bedroom & I could hear them. I was so jealous, I'd masturbate wishing she was making love to me.