My great niece lives with us and my mother in law (her great grandmother) who leaves every weekend to work a few hours away. We are in the process if having her stay with us permanently but presently my MIL has custody. We have a 4 year old and a 1 year old as well. The issue I have been repeatedly dealing with is her taking things from our main house and putting it in my MIL apartment and telling her to put it up and hide it from the other kids. I have repeatedly told both my GN and my MIL that is is not ok.
It is mainly horses, and I keep getting new ones for my kids so they have some to play with and they disappear, only to appear again at my MIL's house, when I go and search for them. I feel as if my MIL is undermining my authority regarding the issue and is endorsing hiding, lying to me, and keeping secrets. We are letting her stay rent free in our home and I take care of my DGN 10-12 hours a day, and she just doesn't get it. At this point I am not sure what to do.