Because I made you upset. Angry, [she clarifies, because she knows how Arya hates any implication of weakness, and anger is almost like strength if you squint.] And I don't know how to explain - I'm not -

I'm not good with people. I'm not good at . . . talking. About this.

[She never has been. It was always Kelsier and Elend. They were political in their different ways; Vin stood uncertainly in the shadows.]