A childhood belief about family

I went to an elementary school that was literally across the street from my house. There was a window on the first floor from which you could see the schoolyard. I was convinced that whenever I was out eating lunch in the yard, my mother was watching me. So whenever friends offered me fattening snacks or encouraged me to do something Mom wouldn't approve of, I gave a scared glance over to my house and said no - all because I thought my mom had nothing better to do all day than sit in the front window and watch my every move.