A fic request on one of the wishlist things mentioned a wish to have only Dean genderbent, and my muse got to work.  In this 'verse, John and Mary had a daughter, Anne, and four years later, they had a little baby boy, Sam.  And you know the story from there.

( Anne Winchester )

What if John and Mary had two girls instead of two boys?  That's the basis for this Genderbend.  It's yet to be written- still in the planning stages, but a few manips and backstory are available here.

( The Winchester Sisters )