
Okay, I kinda get the point of this side story. It's to tie up the lose end of Jacob being alive (after having dealt with ML's brother). This is kind of a continuation of the role of Aragon and Jacob in the strife between the two nations. My guess is that this arc is to finally create some kind of truce, and the Arno household will likely be that bridge - formed by the (potentially) marriages between the vassals and these ladies.
Dear lawd this author is something else. Even when they're communicating, there's still miscommunication! Let the confusion re-begin!!!