Nocturnal Blood

Valkolar finally meets his children. They're twins, eleven years old, a boy and a girl named Sirius and Olivia. Like him, the twins are musicians. Also like him, the twins are vampires. Valkolar kills their mortal mother, and the twins drain her dry. Then he buys a tour bus and they head to New York City, where Valkolar has an appointment with Rosalie, a woman he transformed in the fifteenth century. Presently, Rosalie controls an organization that sells children to cannibals with a taste for tender flesh. Rosalie, however, prefers the taste of her own blood. She clones herself and feasts on the fetuses that eat their way out of their mothers' wombs. When she reunites with Valkolar, she doesn't like the creature he's become. She blames his children. She decides to clone him in an attempt to bring back the creature he used to be. Then she intends to kill him and his children.