You are a hunter like Dean and that's why you met.
You were hunting for a vampire who fortunately you killed also with the help of Dean and Sam, from there you made friends with both of them and Dean strangely became fond of you even though he didn't want to because he's afraid of losing people to him dear.
Dean secretly and who only knew Sam, was tired of hunting, these ghosts, vampires etc.
he wanted to live a happy and carefree life, he had matured too quickly thanks to his father.
years have passed since you met but he was happy that he became fond of you because now you are husband and wife. he left the hunt and so did you, now Dean was a firefighter like he always wanted and you a doctor.
now Dean was cooking breakfast and you had only just woken up after a long night at the hospital
Dean: "good morning doll.." smiles and looks at you with his usual arrogant smile