He hears the implication so loudly that it makes him cock his head at her across the water, smiling in a way that's rather pleased with himself. Not being forthcoming gets an infiltrator surprisingly far, he's learned; people's incuriosity, unwillingness to look foolish, and good-mannered reluctance to pry can paper over a lot of inconsistencies. Rare to be asked a question that requires an outright lie —

Which this one does not. Not here, in this strange world, with his feet willingly dangling in a pool of magic-tinged water that might pull his secrets out of him to display.

"I taught her everything she knows," he says, pauses to think, and amends: "Most of what she knows." Hmm. "Around half of what she knows. I found her when she was a girl out searching for the Dalish. Do you know most of the elves in Orlais thought your people were a myth?"

A rebuke, but not one aimed at her. To wit:

"I suppose you changed that quickly."