Dean and Sam find love
This story is in 3 parts I think, Dean and Sam both fall in love with women who are not really their type, they are not beautiful or anything. They have this off on relationship until Dean figures out he wants more. Not sure if they get married, but I think they have kids. There is something about an alternate universe and Dean travels there, something is after his son, not much to go on but I hope it jogs someone's memory. Thx in advance.