[ dean's already been over this, over what lucifer might or might not do because of what him and his other-self had done. but thing is, dean had done it knowing it could cost him, he'd done it because it had been his chance to. he hadn't been a fucking coward about it.

dean laughs, the sound sudden and sharp. ]

Protect me? What, did you and Sam write your scripts together?

[ it's the exact same bullshit his brother had dished out at him, the exact same lie. and dean can't stand it, doesn't ever want to hear those words again; i did it to protect you. fuck that. he's up already, shaking off cas and leaving him on the floor. none of the earlier relaxation remains, none of the warmth that he'd somehow managed to muster for his friend.

and even if he would have come back, it would have given them time, given them fucking revenge. ]

You should have ganked him, I can't believe-- [ it takes every bit of him to not send a fist flying. ]

Did you just walk away? Did you just think ignoring him would make him any less dangerous?