The one (Dean x Reader)

A few years go by after your toxic relationship, you finally got the courage to leave, then one night, on your way home from work, your attacked by what you later found out was a Vampire, two guys had swooped in at last minute and beheaded the nasty thing. You then end up staying with the two boys, the Winchesters, a year goes by, you learning how to hunt with them, and developing feelings for the older brother, Dean, but what happens when your ex jumps back into the picture?

(Just a side note, there will be some smut, if you dont like it I completely understand, you can just skip it, also, please no hate, I'm new to this)