mum is getting more and more erratic and paranoid believing that we are breaking into her house and moving things etc
Is she also accusing you of stealing things?
Your mums behaviour is so common in dementia that it is almost diagnostic
Welcome to the world of mid-stage dementia
You wont be able to convince her that it is not true, Im afraid. Mum thought her cleaner was doing this too, so she sacked her, but of course it carried on and she thought the cleaner had stolen her keys (because she couldnt find them!) and was letting herself in. So I changed the locks. It continued happening and mum was convinced that her clearer was still getting in. When I asked mum how her cleaner could possibly be getting in as I had changed the locks, she told me she was getting in through the letter box......
You cant win with dementia and trying to reason with them wont work as by this stage they have lost the ability to reason. They
know what they know and if you try and tell them they are wrong it just makes them angry. I found I said "Im sorry you feel that way" quite a lot