I have Power of Attorney for my mom, who has short-term memory loss (probably beginning stages of dementia). I have been doing her finances for a few months. She recently moved back home with my brother, who has more or less been taking care of her. While she was with me, he frequently came by to borrow money from her, which she freely gave. Now that she is home, he has been making way too many ATM withdrawals, and has told me it's none of my business what the money is for - that I am to just pay her bills, not monitor her bank account. I know that this is incorrect. What can I do, as POA, to stop him from fleecing her if she is a willing participant in giving him money?