DS1 had a school friend over and I found out that his friend had been taking sweets out of our treat tin and had talked DS into doing it with him. My friend told him off in a light hearted manner but it wasn't enough IMO. I told DS off when they had left told him it was wrong and not to be pressured into doing silly things. I would have been annoyed and embarrassed if DS had done this when visiting someone AIBU?