Who? Dean and Ruby What? Payback for backstabbery. Where? Disused building in Chitaqua, far from any other buildings for privacy's sake When? Immediately after his exchanges with Lucifer and Ruby on the network Rating? High, for torture!
Dean was waiting in the shed he’d told Ruby to meet him in, the same place they’d tortured Faith just a week or so ago, leaning against the wall beside the door. Part of him knew he shouldn’t believe a thing Lucifer said - he should just trust Ruby to be telling him the truth, trust that she was on his side like she’d been proving over and over again for the last few years...
...but then again, Lucifer claimed he never lied, and Dean had yet to be able to catch him in a lie, so far. So he believed the Devil, on this one. He wasn’t taking any more chances.
There was a Devil’s Trap on the ceiling. Holy water and salt, blessed knives that ranged from huge (practically a saw, he could cut through bone with it) to tiny scalpels for more delicate work, and they’d all hurt her worse because of the blessings on the blades, the holy water and the salt he planned to use with them, because he’d trusted her more than anyone else anymore, and the sudden realization that he’d been lied to all along felt like being stabbed in the back.
He’d turned to her when he had nowhere else to fall, told her things he never should have told her, trusted her with important information and even gone as far as to confide in her sometimes.
He’d been stupid to think she’d changed, because a demon was a demon, and he should have known she’d go crawling back to him, wearing that form and using that voice against her, holding the power he held over her kind as a whole.
He’d been weak to confide in her, because it was better for everyone if he just kept everything locked away, where it didn’t get turned around and used against him. If he never let someone in, they couldn’t do this to him, couldn’t turn around and stab him in the back.
Sam had, and now Ruby, too. Figured.
Dean knew she’d be coming soon. He stood and waited, head down, eyes on the blade in his hands, the flash of silver in the dim light all he could see while he spun the blade through his fingers. Absently, intentionally. He felt like he was standing on the edge of something, some dark pit (Hell, that’s Hell, you’ve been there, you know you’re going back when this is all over, you damned millions to burn and it’ll be your turn again, soon) - on the very edge, knife in his spine (just like it started, you were such an idiot, none of this would have happened if you’d just let him stay dead) pushing and pushing that last step before he’d fall. No going back.
The door opened, angle obstructing him, she wouldn’t see until she was inside and by then she’d be in the trap, she’d never see it coming.