I would whoop some serious ass if hat happened.
My mom walked in on me when I was 14 whacking, But since I was naked, I grabbed a towel real fast pretending I was getting in the shower. I think she knew what I was doing, but I think I covered it up pretty good.
Another time, I was in the bathroom, again I was 14. I remember I was so damn horny at 14 lol. My brother unlocked the door from the outside and caught me on purpose. Dumb bastard. Well, I caught him sending vid text of him whacking it and sending it to his girlfriend. I black mail his ass for that now and get stuff out of him or I threaten to tell his wife, lol (wasn't cheating, it was a previous time.).