You were Castiel's beloved sister. You were younger so he'd let you hang around him and the Winchester's since he trusted him. But lately, Dean's been acting different.

Dean has loved you since he saw you. He's just recently stopped his excessive drinking and hook ups. All for you. It's hard for him, but the thought of you as a possible reward was worth it.

You were in the bunker's libaray, reading about humans and their emotions, when Dean came in with his signature smirk.