Fic: But I've become what I can't be
Written for the 2016 spn_j2_bigbang
Characters: Dean Winchester, Sam Winchester
Length: About 21K words
Rating: R for language and show-level violence
A season 2 casefic that takes place immediately after "Playthings." Still reeling from John's revelation that Dean might have to kill his brother, the Winchesters find themselves in Nashville. They're investigating a case in which people are being brutally murdered by their loved ones, which cuts just a little too close to home, considering that Sam is trying to get Dean to accept that he might have to kill his own loved one.
Also on AO3.
(Okay, I failed at this whole changing the date on my post thing, and my actual story still shows up 2 days ago in my feed, and I assume in yours too. Sorry.)