my sister wasn't allowed to have guys over and lock the door while she was suppose to be watching me.. my mom came home one day and my sister didn't know (she was in her room with a boy while the doors were locked) and I told my mom what she was doing and who was in there.. she got mad and went up to the door wiggled the door knob but didn't say anything so my sister would think it was just me. I went to my room and pretend I never say mom .. my sister got yelled at and punished or grounded. but my sister took me outside and asked me did I tell my what they were doing.. I said no.. and she said thanks for not telling. thus was 4 or 5 years ago.