Are they a couple now? Yup
Are they a good couple? Yeah, their good for each other.
What is their statues? Married and co-rulers of Tortall
Kids? Prince Roald (Kel's friend) and a girl who wants to be a knight, but Jon won't let her. That's right, right?
Other people's opinions on the relationship: Everyone approves
Problems? Thayet didn't want to have to go through a marriage of state, but other that that they don't have any problems.
What books is it in? They get engaged in Lioness Rampant and in the Daine and Kel books they're mentioned.