I really thought I had a copy of this fic saved.

I'm looking for a fic. It is a Wincest AU. Sam is a girl, and has always been a girl. Its amn Old West story. I'm not sure if they are hunters or not. There is sexual tension between Sam and Dean and they ride around on horses, Dean's is called Castiel and Sam has a horse called Ruby. It was fairly lengthy.

I realize this isnt much to go on but maybe someone here can help.

Thanks!