Now that she's taken what she needed, you should change the locks.
Kudos to your young ladies, Ken. I have two daughters just about those same ages, and I can relate. They will come to you when they are ready to talk more -- just let them know you are there for them, and love them, and -- as big as they are -- that this is NOT their fault. Don't encourage them to tell their mother how they feel, unless THEY bring it up.