My mother's dementia has, in the last few weeks, taken a turn for the worse. Since my father died about 10 years ago I have been in the first instance the person who came into her home, provided conversational stimulus, drove her to appointments, shopping locations, etc., and generally was the person who simply WAS THERE for her. She has been financially very generous to me and was so grateful for my presence, which is still twice daily every day. In the last few months or so, things have taken a distinct downward turn. One of my brothers has really stepped up to the plate to help as her personal hygiene has become poor and her cognitive functions have declined, but she has now taken a raging dislike to me, using foul and abusive language to and about me at every turn; has accused me of imprisoning, poisoning and attempting to kill her; and will now not take food from me because, she claims colourfully, that my hands are dirty from having contact with prostitutes, including, she states, my lovely girlfriend. We are in contact with social services, her GP and a consultant geriatrician, but my hope for posting here is that someone with a similar experience can help with a strategy for dealing with this unpleasantness, or is it just something I will have to learn to deal with by not reacting and seeing it as the fault of the disease and not the person, difficult though that is as I am now Public Enemy No 1?