Step daughter stealing from our 1 year old
I have a 10 year old step daughter who stays with us every other weekend. A few months ago she was caught trying to steal a little doll from our daughter, she was told off and gave it back, after our resent visit I've noticed another doll missing. How do we approach this? Her dad doesn't talk to her mum and the dolls gone now so no seeing it in her bag, I keep thinking I could be wrong but our children are only 1 and 2 and I know where everything of theirs is. I've looked and looked and it's nowhere to be found. I know it's only a doll but stealing is wrong and a 10 year old that's already been caught out should know better, plus I don't have the money to replace stolen toys! I did think it was strange that she came with 1 bag of things but left with 2!