He Looked At Me With Man Eyes

I was 13, we were at the beach with my family and another family. I was changing out of my bathing suit after a morning on the beach. I was totally naked when the 15 year old son of the other family walked into the bedroom. I stood in the middle of the floor, he stood in the doorway. If it was one minute or three I don't know, it was long enough for him to see me totally naked.