[Not fooled, indeed -- it is all too easy to recognize the unnatural stillness, the way Art's breathing is tight and controlled. And for a while, he lets it pass, says nothing; it isn't like he can sleep any better, really. Maybe speaking out now would only ruin Art's chances of sleeping, and if one of them can do that... he should rest.
But minutes pass, and eventually, Bucky reaches over (not that the distance between them was ever that great), places his hand against Art's cheek, moves his thumb in a slow circle.]
... guess tonight ain't a good night for catching up on sleep.