Supernatural Sam/Dean Fic Search

[Guest Angel]

I read a fic a while ago where after Dean was dragged to Hell, Sam walked through the gates after him. He took Dean as his and protected him and after they had sex Dean turned into a demon (Sam had already turned into one at some point.) I think Sam was basically running Hell. And when Castiel came to get Dean out he was surprised to find him a demon, but they talked him into reviving Dean's body anyway and then Dean possessed himself and Sam was able to leave on his own because he was a higher ranked or more pwerful demon or something. I think they helped Cas stop the end of the world. That's all I remember. Does anyone know what this fic is?

[Guest Katie]

I know exactly which one you're talking about. You can find it here... It's called

Hell Can Be Home Too by Kirallie