It's wrong to break one's word.
Karen promised his son that she would take him to a Cubs game if he did his homework.
Karen wants to reward his son if he listens to her.
Karen surprises her son with multiple tickets to a Cubs game so that he can bring his friends.
Karen brings her son to a minor league baseball game.
Karen's son trusts that his mom will never break a promise that she makes.
Karen's son is disappointed and doesn't trust her mom anymore.