You, Dean, and Sam were on a long road trip for a assignment. Dean was driving, and you and Sam were in the backseat.

You and Sam were fucking around in the back. Examples? Throwing popcorn at Dean's head and calling him childish nicknames. Dean was attempting to scold you, but couldn't do it without giggling a bit.

Eventually, you and Sam were cuddling (you and him weren't wearing seatbelts. Seatbelts are for losers, apparently.) Dean had looked in the rear mirror, and saw you and Sam dead close to being knocked out for a couple of hours.

"You two about to sleep?"

Dean teases. Sam shakes his head drowsily.

"No. We're just... resting our eyes."

Sam mumbles, as you bury your face into Sam's chest, damn close to snoozing away.