This isn't a 2014 story but it is post-apocalypse Dean and Jo. One of my favs

Serrated Edge (Dean/Jo, Nc-17)
Author: thenyxie
SUMMARY: When you're practically the last two people on Earth, even hatred starts to seem companionable.
WORDS: 4752
NOTES: Post-Apocalyptic. The war is over. Sam won. Dean's mind is strained, half broken, and it's told from his fractured POV, which is pretty much like an acid trip gone wrong. There's so much back story to all this it could be its own verse. I have no idea where it came from, it took forever to write, and I already know there's a prequel I have to write that's Sam/Jo. There is also a sequel Brave New World