Abiding Love/ Castiel

Abby is Dean and Sam Winchesters adopted sister, their dad found her at the motel they were staying at in Rockford, Illinois while they were hunting a creature back in 1993. 18 years later they're still hunting anything and everything in their path, saving the world and killing its demons. But what happens when there's a couple of complications in the way? Will Pierce be able to control whatever she is? Will she find love with a certain friend she's known forever now? Or will everything just blow up in her face?

Season 6-9