At first, before she speaks, he wonders why her smile fades -- then he understands, and his expression hardens as mild displeasure creeps into it.

"Suppose he's our ally now." Then, "Does he know that?"

He hasn't told Daenerys of his own experience with Jaime Lannister, how it had almost seemed like friendship for just a moment, until he had realized that the Kingslayer was making sport of him and of the Watch.

But that was long ago, when he was a green and thin-skinned bastard boy.