I read this fic a while ago. All I remember is that the story is told by a kid whose mum runs a store, I think. Sam who doesn't know who he is, comes into the shop one day , stays with the family and helps with repair jobs and stuff like that. Someday Dean comes to the store and their connection is immediately visible. Dean has a gun with him, which freaks the mother out. I don't remember much more, but I know it was a wincest story. Any help is appreciated. Thanks.