Or hack each other to pieces.
Or wallow in your failure-induced depression.
Yep, even the best sibling relationships sometimes end in defeat.

Credit: Dean Buscher/The CW
Thankfully, the Winchesters live to fight another day.
Not so much the Plum sisters, though.
But first, lets check in on a pair of caged angels.
In their side-by-side cells, Castiel sits contemplatively, while Lucifers as twitchy as youd expect.
Agitated, Lucifer blasts his stick against the wall (not a euphemism) and plots.
He and Castiel step out of their cells to face down the remaining guards in full badass fighter mode.
He stabs Lucifer with an angel blade, announcing, This is me, learning from my mistakes.
Then they bash his brains in with a sledgehammer.
You seemed like a decent dude.
By zero coincidence, Dean bumps into younger sister Jennie when he leaves the bunker on a beer run.
Gloriously, magically in love Dean is a genuine sight to behold, friends.
No worries, Dean says; Jamies got a sister!
When that still doesnt convince Sam, Dean lays him out with a punch and leaves on foot.
Rowenas back, yall, and shes saucy as ever!
Still, it took a long time to heal, and shed prefer not to go through that again.
And then she turns her attention to the Plum sisters, asking Dean if they got to fifth base.
When he looks at her in confusion, she smirks.
Oh, you poor sheltered boy.
Teach me your ways, you ginger goddess!
From there, theyll have to use shoe-leather investigating to track down the Plums.
Im very sure it’s possible for you to, but Im also very sure you shouldnt.
At this, Rowena sighs, Bless your precious heart, you just described my entire life.
Sams seen it, too, and it still keeps him up at night.
But the world keeps almost ending (#WinchesterProblems), so he just keeps repressing it.
Brenda is all of us.
Ooooh, curse your not-so-sudden and entirely expected betrayal, Rowena!
Theyre really not, and the next thing you know, zombie mom shambles into the room.
You cant reach that?
Sam finally snags it, and a flick of Deans lighter burns it and frees them.
The sibling carnage even rattles the Winchesters, which is really saying something.
He still pries it out of her hands.
(Easy for him to say, though.
Deans the one icing his knee after a well-placed Plum sledgehammer blow.)
Sam doesnt deny it but promises to put her down if she becomes a problem.
And hey, if it works, shell have more power to make Lucifer suffer.
And we close on Rowena chanting with the Grimoire page in her hand.
(Lots of eye blood seepage tonight.)