The best way to object to the situation that you have written about is to consult with an attorney that practices in the area concerning cemetery law to assist you in blocking any efforts to have your mother's body exhumed. The surviving husband of your mother (not your father) will have to file a petition with the court seeking what he wishes to do. He is required to serve notice of such upon all heirs of your mother. Meaning you and any siblings.I suggest that to be proactive, begin seeking out an attorney now rather than later to help you.