Fic: Free to be 'Us'
Author: emerald
Summary: Something goes wrong during a hunt and Sam gets cursed by a witch and turned into a girl. Sam has to go through a number of things from having his period to dealing with his new virgin status. Trouble is Sam makes a really hot chick and everyone seems to notice…including Dean!
Rated: NC-17
Categories: Sam/Dean
Warnings: Genderswap
Genres: first time, humor, romance, violence
Fic here: http://www.sinful-desire.org/archive/viewstory.php?sid=3298