You're hunter like forever. You raised this way. And you met sam and got into relationship with him because of this. But even so he loves you so much you are always insecure, thinking that you're not enough for him. That you're not beautiful enough or something like that. And you always feared that he may leave you or cheat on you because of that. One day when you, sam and dean were on a hunt you met a Hunter girl. She was really hot and pretty, literally and she clearly showed interest in sam.

... You looked out side of the window seeing sam and that girl talking and laughing. They were close, close enough to remind you of all your fears. The girl got closer to sam...their faces were so close. You turned around and didn't see what happened next you didn't want or dare to.