Dear Abby: Grown child wants mom to move past divorce

DEAR ABBY: When my sibling and I were 6 and 10, our parents sat us down and told us they were getting a divorce because Dad had an affair. Mom was, to say the least, incredibly hurt. Her hurt and resentment haven't subsided to this day. Dad has never apologized to her, but he has supported her financially ever since.

Mom has tried therapy, but the minute a therapist upsets her, she stops going. My parents both now live near my sister to help care for her twins. Mom is constantly upset with things Dad does or that he's not friendly enough with her. She says he is nicer to strangers than he is with her.

I don't want to seem insensitive, but they have now been divorced longer than they were married.