It's wrong to make fun of your partner.
Kelly and Stan have been dating for a while, and are on a double date with friends.
Kelly wants to make a joke.
Kelly makes a self-deprecating joke and makes Steve the hero of her story.
Kelly makes fun of Steve's appearance and mocks his accent.
Steve defends Kelly, and the two become closer as a couple.
Steve feels hurt, and decides he no longer wants to date Kelly.