Until Death Do We Part - Love at First Bite (Wild Wulfs of London #2.5)

Until Death Do We Part by Sherrilyn Kenyon
Over five hundred years ago, Esperetta’s soul was bound to her husband’s by dark magic, and when Velkan became a Dark-Hunter, to her horror, she became immortal as well. Now, they must come together to fight an old enemy…and the passion that threatens to consume them once more.