Arguing is impolite.
Amber and Chris are having dinner at her parents non-smoking house, and Chris just lit up a cigarette at the table.
Amber wants to confront Chris.
Amber calmly tells Chris that her parents don't smoke, and asks him to please put out his cigarette.
Amber begins to yell at Chris, accusing him of knowingly breaking the non-smoking rule, so he yells back.
Amber's parent's appreciate her and Chris handling the issue like adults, and they all enjoy dinner.
Amber's parent's ask them to both leave for their childish behavior.