My brother has been appointed personal representative of my Mother's estate. Prior to her death she had a joint checking account with him that allowed him to pay her bills such as heat, electricity, real estate taxes and health care. He has told us that he had to use some of his personal income to cover the bills. Is he now allowed to bill the estate for my mother's personal expenses that he might have paid? There is no way of us, to prove or disprove his claim as the account was a joint checking account and after my Mother's death it is now only under his name.