Glimmer and Burn by Luci Briar

Miranda wants to save her sister.
Devin wants revenge.
Neither of them wants to admit that they want each other.

Devin Drake hates one person more than himself, and that man is about to marry Miranda Wilde’s sister. They’ll have to work together if they want to stop Yarrow Graves, a Night Fae who has the entire city wrapped around his finger. Surely, they can stop bickering long enough to keep her sister safe.
Miranda is only tolerating Devin to save her sister. She’s a guardian, a human gifted with Divine’s blood and has trained her entire life for combat during a time of peace. Saving her sister is her last chance to use those skills before she’s expected to set aside her sword for matrimony where her only use will be to host parties and raise children. In other words, hell. Yet as she navigates the world beyond her own backyard for the first time, Devin shows her that life can be more than ballrooms and that pleasure could be hers for the taking, if she’s brave enough to make the leap.
Devin doesn’t need anyone or anything since being neglected by both sides of his heritage. The Night Fae despise him almost as much as his human father had, and as far as he’s concerned both can go to hell. He certainly doesn’t need the combative and sharp-tongued Miranda tempting him to lower his defenses—her lips are temptation enough. But as he spends time with Miranda, she awakens something far worse than lust. Hope. He knows it’s foolish to crave her acceptance when his own father cast him aside, but a part of him can’t help pining for a life he never thought possible.