Found! specific story, Sam/Dean, John kills someone, Sam tortured

[saraid.livejournal.com]

Okay, here goes. I've got a lot of bits and pieces and I hope they're enough.

It's pre-series. wincest. Underage, Sam is 15 and Dean 19 when the relationship begins.

John and Bobby torture and kill a demon sympathizer's son.

In revenge, the sympathizer - the victim's father - kidnaps and tortures Sam, exactly replicating what John did to his son. It turns out the son wasn't infected with demon blood.

John, Bobby, Dean and a group of hunters rescue Sam. Dean is so angry with John that he won't let John help him take care of Sam in the aftermath.

Bobby guesses/knows about Sam & Dean's relationship.

And - I'm not as certain about this part - a legendary old hunter (OMC) gifts the boys with a set of magic knives, which they use to create a bond between them.

FOUND!

http://archiveofourown.org/works/411362

Gleeful thanks tocmsserenity

Mods - some of my original tags turned out to be wrong; can I fix that?