Title: We Three Kings
Author name: cosmic_medusa 
Genre: Dean/Cas (barely), Sam
Characters: Dean, Sam, John, Bobby, Missouri                             
Rating: R (language, addiction)
Word count: 5,000
Warnings/Spoilers: A complete alternate universe. My Dean/Cas is so tame it could be gen. Angst/schmoop/addition/protective!Dean/addict!Sam/awesome!Cas
Author's Notes: Fully intend for this to become a 'verse.
Beta: All mistakes are mine.
Summary: Cas, a doctor, falls in love with the mechanic, Dean Winchester. He understood, early on, that this meant adopting his younger brother, Sam. He didn't, however, count on all the loss that would follow the Winchesters, the addiction that would trouble Sam, or the problems his own family would cause following his commitment to the boys.

Follow the cut:

Cas lived with the phone ringing in the middle of the night. In college it was one of his brothers, drunk and swearing, or his mother, crying about the drinking and swearing. In med school it was friends panicking over papers or exams, then doctors summoning him onto emergency shifts. Then it was just the business of being on call. Then it was Dean. Then Sam. Then Dean calling about Sam. Then Sam calling sobbing for Dean. Cas just lived with it.