Heeeere we go: Gotta Catch 'Em All (http://community.livejournal.com/ctheb_fic/3680.html).

Just thought I'd exercise caution with the Wincest! I know it makes some people understandably uncomfortable, and other people post "I ASSUME THOSE THAT SHIP SAM/DEAN MUST WANT TO HAVE SEX WITH THEIR OWN SIBLINGS" secrets on Fandom Secrets.