We have 3 teenage daughters who are constantly wearing each others clothes without asking. For the most part they work it out themselves, with an occasional loud argument. The problem is that one doesn't live at home anymore, but visits frequently, and then my daughters notice that something is missing and she has taken it to her house. Do I get involved or let them deal with it? I have even thought about the 2 girls living at home lock their rooms, what do you think? I have read your info on sibling rivalry and tried to stay out of their squabbles and just tell them to deal with it but I'm not sure how to handle this one.