Dean and Seb have known each other for five years. They’ve been dating for two.
It all started when Dean needed a sniper, and of course, he only wanted the best.
As both men profess to be incredibly straight, their bromance was rather adorable for quite a while. Nobody really thought they were in denial, simply because nobody ever saw anything going on that could even be construed as less than heterosexual.
And then they got drunk and Dean found himself forced up against a wall. It turned into a fight and then it just turned into sex.
They both tried to ignore it, but you don’t have amnesia inducing, bone breaking, dimension ripping intercourse and just move on.
Sebastian asked Dean to marry him. Dean said no, if only because he wanted to be the one to ask Sebastian.
They don’t get rings, but Seb gets a new rifle and Dean gets new rims for the impala.
The wedding has three attendees. Jim, Cas, and Sam. Death apparently ‘lost the invite’. Jim was pouting the entire time.
The reception, however, involved strippers of both sexes, enough booze to sink the Titanic and more supernatural beings than Seb cared for.
Jim finally did get to meet Death. They’re on perfectly friendly terms if only because Jim has kept him rather busy in Tibet of late.
Dean and Sebastian went to India during their honeymoon and found seven entirely new breeds of demons.
Dean doesn’t need Castiel to save him anymore. That’s why he married Seb.