My mother handles my grandmother's finances. There is a large estate. Everything is transparent and all family members have access to all transaction records, investments, etc. My grandma is paranoid about "being left destitute" and even though my mom explains all bills paid, my grandma can't understand, and is very forgetful from one minute to the next. She is verbally abusive to my mom. My uncles don't get involved because they don't want to step into the line of fire, so to speak. She recently became convinced my mom bought a new car with her money. This is not true. She has dementia and needs my mom's help but is abusive. We explain it to her over and over, but she is convinced.