Silver Verity (Bk 3‪)‬

While participating in a covert mission against the pirate threat in Fairydom, Princess Rebecca is also wrestling with wedding preparations, complicated customs of her soon-to-be in-laws, and arranging to share her wedding day with two of her former suitors and their fiancees.  
Realizing that the wedding is just the beginning of marriage, she and her fiance work very hard to grow together through it all.  They'll probably survive the wedding and coronation—but first they have to survive the battle.  The royal fleets are sadly outnumbered.  Dare they hope for a victorious outcome?