He's not sure he can.

His gaze slips away from Natasha's face, landing back on his food. His jaw tenses once, and he shakes his head.

"There are people there who need me," he answers quietly, but firmly. "Nat... I know you've lost people. To war, to the work we do -- can't avoid it. But what if I told you that... that ship, that place, makes it possible to see them again?"