The Bloodlight Legacy: A Vampire Romantasy (The Bloodlight Lumière Series) by Jade Christy

I’m secretly pregnant. With a vampire’s child. And the fate of an entire city depends on me. We've got to rescue Leo and retake the Heart of the Morning artifact. And we'll need to trick Darian Vex to do it—but he’s not the kind of monster who forgives. He'll want revenge. The final battle is coming. The man I love would die to protect me and our child. The Heart of the Morning—an ancient artifact I alone can wield—has chosen me, the Bloodlight, to decide the fate of them all. This time, I decide who lives… and who turns to ash. - This is the final book (book 3) in the series.