The words that he speaks back to her don't quite make sense to her. Why not? How does she explain that to him? It seems like such common sense. You don't threaten to kill someone over a minor slight.

"You... You can't make a case about the ends justifying the means here. All he did was say a name wrong. Whether he meant to or not, that doesn't mean that he deserves violence in retaliation for that. That's way too far."