I have power of attorney for my parents. and my Dad has Alzheimer's.I have POA for my parents. and my Dad has Alzheimers. My brother moved in temporarily while he sells his house and looks for a new one. This caused my Dad to have nightly hallucinations which we now have under control with meds. No my brother wants to move his girlfriend in and I'm afraid it will have a negative affect on my Dad and make us increase his meds. My Dad has stated he doesn't want my brother to live there anymore and he doesn't want the girlfriend moving in. Since I have POA can I block him from moving his girlfriend in?