Dean and Cas have been dating for a while now, secretly, but what will happen when Cas' mom and Dean's dad gets married and they become stepbrothers?

I have many obsessions when it comes to fictional characters and relationships and one of them just so happens to be Destiel! It's already canon in my head, for many reasons, which I will not explain because then I will go into rant mode. So these are just collections of random one shots that pop into my head once in awhile, about random things that have to do with my favorite hunter and angel relationship.