"For when I- oh. Oh." He doesn't know what to think. On the one hand, she's taking steps to make sure he can come back to her.

On the other, she's assuming it'll be needed. He chides himself almost immediately for thinking the latter. He'd be foolish for thinking he's invulnerable. He should know damn well that he can die, and easily. Was the first time not enough of a lesson for him?

"Thank you," he says humbly.