Wicked Magic by Cheyenne McCray

Rhiannon Castle is a D’Anu witch whose is a D’Anu witch whose Coven sisters know nothing of the Shadows that lurk within her. Rhiannon can’t reveal the truth to anyone—least of all Keir, a rugged warrior soldier who walks into Rhiannon’s life and awakens her to a wanton reckless desire…

Keir’s Tuatha D’Danann Tuatha D’Danann brethren are the only real family he has ever known. He trusts no one—until he is sent to San Francisco and meets Rhiannon, the one woman with fire enough to tame him. Every seductive encounter convinces Keir that she belongs with him—even though Rhiannon knows her powers could put him in peril…

And then a new threat rises from the depths of the Underworld. When a demon goddess unleashes her evil upon our world, Rhiannon’s secret could prove the ultimate weapon in this epic battle—or forge a pathway to destruction for the only man she’s ever loved…