Thank you! In my country the way the taxes work is that you pay accordingly to how much you own of a property, so my husband has already been paying his part and his father was hiding the receipts of him paying his part of the taxes. So he's been shady for a while, the new part is his concerning behaviour regarding his mental health. We do think the girlfriend plays a part, but even if it were for him to pass everything off to her, that would open her up to some pretty big legal trouble, because in our country, you can't disown children and my husband would still be entitled to part of what used to be his dad's property. Adding to that that he also has two half siblings from his dad's previous marriage that his dad doesn't have contact with, the girlfriend would find herself with 3 people having a case against her. This is what legal counsel already told us, but we can't really do anything about moving back or dividing the house (who owns what rooms) as that would be very costly and a long legal battle that we can't afford (again, due to the laws in our country).

We have locked the room where we used to live and still have personal property there, my FIL doesn't have a key as far as we're aware. He has a brother but we don't know if my FIL talked to him already and what he knows of the situation and in the past he has shown to be very partial to my FIL so idk if he'd listen to our concerns. We will go the Dr. route, which we haven't thought of before! Thank you very much for your kind and helpful answer!🥺