You and Dean had been friends for years, hunted together, drank, just talked, everything. You were also Sams bestfriend too which helped make your bond better with both of them.

Dean and you had to much to drink one night and slept together, the next morning you freaked not wanting to ruin the friendship, while Dean sat in the bed confused, he had never felt this way about a girl. Later you came back and asked if you two could just pretend it never happened.

Dean was shocked, but also aggravated, that was usually his line after one night stands to always tell the girl, just to be friends. This was different though Dean actually cared about you, “how can we go back to being friends, when we just shared a bed?”