Only now does Dean realize that Sam is without a shirt — he had assumed Sam had taken his, but obviously that isn't the case. He shakes his head to himself, thinking that it's pretty freaking ridiculous that Sam could live years in a world like this, reunite with a brother that he obviously thinks has lost himself (or whatever spin Sam wants to put on it), and see all of the ugliness that exists — and still retain enough kindness to literally give someone the shirt off of his back.

It's stupid, is what it is.

Dean spends the next half hour keeping watch. He stays seated on the bed for a little while, but before long, he realizes just how tired he feels — so he stands up and paces quietly around the room for a while, occasionally stopping to take a look out the door. He's in the process of lapping the room again when he hears Sam mumbling in his sleep.

Dean walks over to him, standing over his bed, but he doesn't wake Sam up right away. He listens, and hears very clearly the words won't say yes — and immediately, Dean knows that Sam isn't just having a nightmare.

Putting his hand on Sam's shoulder, Dean gives him a rough shake — there's nothing gentle about the movement. "Wake up."