all the fic I wanted to write but didn't

An AU in which demonblood!Sam and demon!Dean both exist.

Sam's been the Big Bad for seasons but then Dean becomes a demon and they team up and take over Sunnydale.

When Dean first wakes up a demon, he leaves the bunker and goes looking for Sam. Sam can smell his demon blood.

But Dean is a Knight of Hell and Sam can't control him like he can other demons.

They end up joining forces. Dean feeds Sam and Sam is more powerful than ever before.

And they bang. A lot.