My head is in a really dark place just lately. Unlike the Winchesters, a splash of holy water and a little Latin doesn't do a great job of exorcising my demons. Fic, on the other hand, sometimes works.
This is the unbeta'd version; apologies for that, but it's been so long since I posted something I wanted to share. ETA: Now beta'd and this is the final version.
Title: Deliver Us From Evil
Character/Pairing: Mary Winchester. Mary/John if you want to split hairs, but there's no sex, just the canon relationship.
Spoilers: Only up to All Hell Breaks Loose.
Rating: Adult (for violence/horror)
Warnings: Dark. Really dark. Everyone dies.
Summary: The demon war is over. Humankind lost. In a post-apocalyptic world, the few human survivors live in small enclaves behind high walls, while monsters roam the world that once was theirs. Mary Winchester lives with her husband and son in one of those enclaves...but her family hides a secret that is about to threaten them all.
Also posted on AO3: http://archiveofourown.org/works/2708