Vampire Huntress Legend, book 08: The Wicked
L. A. Banks2007

The Body of a Goddess...with the Heart of Hell itself.
Damali and Carlos have finally tied the knot, but there is no happily ever after on the horizon. Cain, the son of Eve and the new chairman of the Vampire Council is amassing an army of creatures like no one has ever seen before. But while a band of human scientists are conducting secret experiments they open the dimension that holds Cain and he is released into the human world, bigger and badder than ever. Her family slaughtered, Damali heads for hell to serve justice and faces off with a nemisis the likes of which she has never encountered. Carlos doesn't take his wife's disappearance lightly and races against time to get Damali back... only to learn that his wife might be pregnant. The question: is the child his or the Chairman's?