Sister Trying On ClothesI was 15 at the time. I came out of my room and as I walked down the hall I saw the door to my parent's room cracked open a bit. As I got closer I could just see my mom sitting on the edge of the bed and my 18 year old sister standing in front of her.
My sister was trying on clothes and my mother would have her turn around so she could make marks or put pins in. When she took off a dress I saw she was naked underneath. I moved closer to the partially open door and watched as sis went through several changes, being naked between each one.
As they finished trying clothes and my sister got dressed, I quietly backed away and went back to my room.