Awakening Outside Rivergrove by fanspired on Ao3. Part of a triology but can very easily be read as a standalone.
Summary: After a night of hard drinking Sam wakes up to find himself cuffed naked to the bed, and his brother in the grip of a demon with an unorthodox agenda. Masks are ripped off, walls crumble and feelings are exposed as Sam and Dean are forced to confront their hidden desires.
Context: Season 2, between CROSSROADS and CROATOAN.

Thanks! This looks great.

Got one more for you...it is AU in that the boys aren't hunters. Also, check the warnings.

Bend My Finger Back (Snap) by viviansface.
Summary: Dean is only seventeen when he hits his lowest, losing his mother in a fire. After that, his family seems to fall apart -- his father is suddenly distant, and between therapy sessions and trying to struggle through each day, Dean and his brother Sam grow apart as well, even though they used to be more than close before the fire. It takes Dean two years to grow tired of this and decide to do something about his life for once... but there's no telling whether his decisions are the right ones and whether they will eventually lead to the happiness he desires.

Haven't read this one either. Thanks!