Note: Set several years in the future.
It's the first quiet evening they've had in a while. Jo is throwing knives at the dart board, her movements swift and precise, not at all like the way she used to fiddle with her dad's knife when they met. Dean is drinking beer and pretending not to watch her, and that's when Sam finally puts it together.
"You like her."
"What?" Dean twitches. "Come on."
Sam shakes his head, grinning. "You like her."
"Gonna write our names in a heart on the back of your notebook, Sammy?"
"She is so over you, man."
"Yeah, yeah, whatever."
"You used to call her Princess Buttercup. You glued her curling iron to that table in Reno. Oh, and there was the time you told her she was an Ewok and you were a Wookiee."
Dean glares at him. "Shut up."
"You put ectoplasm in her shampoo. You are never getting to first base."
Jo glances back at them. Dean tries to smile and knocks over his beer.