Oh wow, what a story, what a book.
I think this would be a book that would be enjoyed by anyone who enjoys historical fiction, not just people who enjoy fantasy (in ways it may appeal more to historical fiction fans). With a complex world, well thought out characters (could have done with a little more difference in some of the names, minor quibble tho) and complex reasoning for going to way it's a book well worth the effort.
In a kingdom where courtly love is important the neighbouring kingdom have different ideals, ones that put women far below men. When a wife of a lord of that kingdom escapes to the other it starts a cascade of events that make people choose. And these choices will change the way of the world.