sister used POA to steal mums money. she took vacations to new york, cruises, expensive clothes, wigs, cars, house! mum has alzheimers in nursing home. there are two other siblings. mums will indicate all of her property would be divided among all three children in event of her death. APS findings indicate theft of over 100,000.00 dollars. (she really stole more than that) sister got lawyer who is saying she has right to spend the money because the POA indicates some type of gift clause. Advice please?