As part of Sam Winchester being Lucifers vessel, he had developed something he hated, a ‘devils face’. You two had been dancing around your feelings for a while but after he gained his devil face, he wouldn’t let you get close to him.

“You don’t understand me.” He said, facing away from you.

“Let me try.” You pleaded, gently grabbing his arm and turning him around. When you saw him his devil face was on full display.

“You except me to think you could accept this?” He asked, angrily