[ She has an odd insistence on eye contact that he both enjoys being forced into and loathes being forced to reveal through. It's a good barometer for when she feels like a point needs to be made, but more often than not she's making points when he feels the most evasive, and it just results in a mildly unpleasant feeling of being cornered by someone you care about. ]

I don't mind - it's a good thing. Something to work for. If I didn't owe you anything, you'd just be somebody else. [ Which is a weird way to put it, but it's a point of his own in return. If he owes her, she has a concrete reason to be here. Or at least, more of one than not. He's owed the most important people in his life things, it's not something he takes lightly. ]