Dean eyes him suspiciously, sneaking glances from the driver's side when Sam isn't looking.
Not that he is looking anyway.
His eyelids flutter and his head lolls to the side every few minutes.
He's trying to stay awake, but it is a losing battle.
"C'mon Sammy, stay with me here dude. Almost there."
They pull into the motel. Finally.
Dean snakes an arm around Sam's waist, and damn if this kid isn't a kid anymore, drags him in and onto a bed.
"Mmnhm" is all he gets, as he flips off Sam's boots, then the light.
Dean smiles.
"Anytime bro."