Listening to My Parents

The other night I was sitting in my room and heard my parents go tho their room. After about 5 or 10 minutes I began to get curious so I opened my door a bit. I stuck my head out and what I began to hear was something I thought would scar me for life. To my surprise the creaking of my parents bed and the moans of my mother as my father penetrated her and brought her to an amazing sounding climax was quit erotic. As I lay there my head stuck out of the door my 7 inch erection stuck out of my pants. I began to rub my hard on trying to match the sounds of the bed that matched the deep thrusting of my dads cock into my moms now probably soaking wet pussy. I began dreaming as if I were in there having sex with them. When I came it was amazing as I'm sure it was for them too. Was this wrong? I don't know but it felt good.