For a moment, it's Kate's tone more than anything that catches his attention and forces him to focus. But then... she's right. Annie will make a great mother, he has no doubt about at all. And there is some kind of support system here, however strange it might feel. If he messes up, the kid should still, hopefully, have someone to fall back on.

"You're right," he says after a stilted pause, lips twitching into a faintly relieved smile. "You are. It's just... been a lot to take in, I guess."

He doesn't mention that he's afraid of what this 'different stuff' might be here. The things about the island he can't predict or control. In a weird way, it's not too different from protecting him or her from the Capitol; it makes him feel equally helpless.