Days of Vengeance (Vines & Venom) by Rachel Mays

Emilie Escaping Murvort should have been the end of my nightmares, but everywhere I look, I'm tormented by the ghosts of my enemies. Their phantom gazes linger on me, and their fingerprints are permanently etched into my skin. I can only pray to the gods that I'll be able to move on with my life once Reyna and her loyalists are all dead and buried. Ladon Guilt weighs heavily on my mind. My brother saved my life, but in doing so, put his at risk. Even worse, while Cyrus lies unconscious in the healers' ward, I can't keep my thoughts off of his betrothed. When he wakes, I know I'll have to repent for my disloyalty, but nothing will stop me from being with Emilie. We've been through hell together, and she's the only one who can ease my suffering. A glimmer of hope arises when our spies catch wind of Reyna hiding in a coastal town. She has evaded us for far too long, but that ends now. Even if it kills us—vengeance will be ours.