DEAR ABBY: My father’s behavior has been very peculiar lately. He and Mom have been married for 45 years. Of course, all marriages go through ups and downs. They have had their share of health problems. Both are doing OK but are dealing with some medical issues. Because of my father’s actions, I’m afraid for my mother’s emotional state. He stays gone for long periods of time throughout the day and sometimes stays out until the early morning of the next day. She always stays up until he gets home. When she calls or texts him, at times he doesn’t respond.