This is when you smile at the daughter, shake your head sympathetically, and say, "They're so difficult at that age, aren't they?"
ROTFL!
I've held those jobs before where people feel free to take out any and all frustrations in their own lives on the workers. It's my considered opinion that everyone should have to have one of those jobs at least once in their lives so they can develop a little empathy.
Good for the daughter for failing to fall in step with her mother!