Fighting Tooth and Nail(Supernatural)

Kat has never had a lot of goals in life. Survive. Protect her sister Alyson. Hunt and kill any paranormal creature that gets in her way. And keep from falling for Dean Winchester. If she stuck to these goals, everything would work out okay. Alyson has always been in the background, preferring to assist Bobby while her sister fights. But when Dean is pulled out of hell by the angel Castiel, none of the rules will work out anymore. Alyson is falling in love with Cas. Kat isn't sure she can stop her caring for Dean. And both sisters have a role to play in the upcoming battle... Though neither knows what that role is. All they know is that they will have to fight tooth and nail for everything they ever wanted, and everyone they ever loved.