Dean's always known Sam's stubborn, and he's gotta have his nose rubbed in his fuck-ups in order to get that he's screwed up.

Which is why he sighs, scrubbing one hand through his hair.

"Yeah, Sam. Just remember, it's your ass on the line when she fucks us over."

And it's gonna be Dean's job to make sure that doesn't happen.

No way. No how.

Not on his watch.