Seniors

The specifics would depend on the law of the state where the mother lived, but the brother could ask the probate court to remove her as executor so the estate can be probated, distributed and closed. If she doesn't take care of this or get someone else to do it she could be personally liable for all expenses the estate incurs, and the brother could even sue her for his inheritance that he didn't get because she failed to file the probate documents. She should immediately consult a lawyer who handles probate matters who could advise her and help her either take care of the estate or hire someone else to do it before things get even worse.