[Guilt sets in almost immediately following her reaction. As much as he can't understand why anyone would be glad to be rid of their magic (rather than the stigma associated with it, at least), he isn't driven to pursue it any further at the moment. That would be just as cruel.]

I'm sorry. I am being... inconsiderate. They cannot be completely malevolent, I suppose, if they have made you happier.

What don't you understand? I'm happy to explain, if you'd like. [He's still confused about much of what she's said, too, but he's pressed her plenty on the matter.]