The Lost Vampire by Kate Baxter

Soul mate–or tragic fate?
Once one of the oldest dhampirs in existence, Saeed now faces a treacherously uncertain future as a vampire. He believes that the only thing that can restore his position within his coven and tether his lost soul is the flame-haired fae who is destined to be his mate.
Cerys Bain is a soul thief. She is feared by those who dwell in the supernatural realm–and hopelessly bound to the ruthless mage Rinieri de Rege. The raw, sensual vampire who enters her world is both a threat and an intoxicating temptation: No one has ever made Cerys feel the way Saeed does. But to claim their fate as soulmates, Saeed must first find a way to free Cerys from Rin. Is their desire worth the risk of certain destruction–and eternal doom?