What does 2 Samuel 14:13 mean?

She said, 'Why, then, have you done the same thing to God's people? By refusing to bring back your own son who's been banished, you're acting against what you just promised me.' 2 Samuel 14:13 - Modern Text Bible

(She turns the story around, pointing out that David is being inconsistent—he's willing to show mercy to her, but not to his own son.)