My mil lives in America, but until Christmas would make regular, long visits. The longest one came last summer, when she stayed for four torturous months. We knew she’d registered at our GP while she was here, but I’m now starting to suspect she may have registered other stuff. She was very abusive to my husband in his childhood and moved to America when he was in his mid-teens, dumping him in the care of his wonderful sister. She didn’t really bother with him after that; not until he got a house, grandkids (although she only wants one of them) and stopped liking where she lives in the very cold north of America. She came for one week at Christmas and her behaviour was so awful we are contemplating severing ties. She has now announced, via sil, that she is moving to Southend, despite the fact that she is now not speaking to us. We are the ONLY people she knows here - she is actually Scottish. This is going to escalate horribly as, if you’ve ever dealt with an NPD, all she now wants is to ‘win’ against us. I’m scared she may have legal rights to our house, if she can prove that she has stuff registered here? Also, as a separate issue, she has a long and charming history of accusing people of violence against her, abuse/neglect of their children to social services and just general, awful smear campaign stuff. There’s a reason I’m typing this at 4am; she’s here this week and I am terrified of what is going to happen when she launches war.