I took care of my mother in law who had alz, it is a very difficult job you have so I want to say first, please take good gentle care of yourself! I know the APs warn sgainst using them for dementia related symptoms but we found that seroquel really helped. My mother in law would just wondrr on occasion how 'good old Frank' is doing (her husband died in '88) but what agitated her most was that we wouldn't allow her to drive. The dr made a point to her of taking her license but it was hard for her to accept.
In our case eventually we had to move her into assisted living because I could not get her to bathe and she was incontinent. I just had no authority with her and she was getting more unhealthy physically the longer she stayed with us. It really was the best thing for her and I, especially for my mental health which had begun to spiral into depression and anxiety. I wish you the best.