Guests of Honor (Alliance By Marriage, Book 3‪)‬

A wedding invitation is usually a good thing—unless you receive it from your past enemy and find yourself in a position where you can't refuse it. When King Harpax—by now an experienced ruler, a faithful husband, and a somewhat struggling father—has the misfortune of receiving such an invitation, he suspects that things might go wrong. He has no idea, though, what a twisted trap awaits him, and how close he's about to come to losing everyone and everything he loves.