Dean. Hated. Demons. A demon killed his mother, and the same demon killed his father to save his life. He wanted to kill every demon in existence, and he would never stop until they were all gone.
Until you. You were a demon too, you were killed in the early 1800s, 2 centuries ago, so you still had your soul. You still knew who you were, unlike most of the others. You escaped through the gates of Hell while they were still open, and you possessed a human girl to stay there.
Well, one day, you were walking through town when two men were talking to some girl. They wore suits, and they looked awfully familiar. Then it hit you, the Winchester brothers. They were hunters, big in the world of supernatural. And one thing led to another, and you ended up in Dean's bed.
Dean gently rubbed your side with his calloused hands, and he kissed your collar. You yawned, and he chuckled. He gently pinched the soft skin of your side, and he spoke softly in his deep, rough voice.
You're tense. What's up?