My younger brother was always peeking at me when I took a bath or shower.....I admit that I enjoyed teasing him, and when I knew he was peeking, I would often fondle my breasts and masturbate....a few times I could see him in the reflection of the bathroom mirror gazing at me and jerking himself off with his hard cock pulled over his pyjama shorts....
I watched my sister almost every day and she always knew about it, and when I went to her at night, she could pretend to be asleep and let me do everything.
You had one job lady.