There's a fleeting, apologetic look from Bucky as Steve pulls his arm away. And then it's gone, and he lets the subject fall. His concern for Natasha--that's way more important than a little awkwardness about what he can and can't share with this version of Steve Rogers.

"I'm not sure. It crept up on her slow." He studies her sleeping face for a long moment before glancing back to Steve, his expression suddenly open and vulnerable with worry for the woman next to both of them. "She's the only one of us who's been eating from the orchards, ain't she? Damn it."