I'm probably a minority here but in my opinion the story is only intriguing up until the protagonists in a story declare their love for each other. So if the 2 main characters get together then the story is over because the dynamic changes.
This is the basis of all romantic fiction.
if JK is going to continue writing any more books about them then they can't be together properly (something has to keep them apart). She moves the romance very slowly forward in each book because of this principle.
I think it might work out to have them as a couple, BUT something else then needs to be a basis of the romance not moving forward at speed or that they need to work out.
Personally, I think we might get to see Robin working out that Murphy isn't her guy in the next book and working up to the break-up, but it will take her time. she seems like a person that knows this isn't working, but will try to make it work first.
Personally, I think we might get to see Robin working out that Murphy isn't her guy in the next book and working up to the break-up, but it will take her time. she seems like a person that knows this isn't working, but will try to make it work first.