Cerulean Sins — Laurell K. Hamilton

How the mighty have fallen! Once a sworn enemy of all monsters, Anita is now the human consort of both Jean-Claude, the Master Vampire, and Micah, the leopard shape-shifter. Not quite as human as she once was, she is consumed by both their hungers--desires that must be sated time and time again. And when a centuries-old vampire targets Jean-Claude and his clan, Anita finds herself tested as never before--needing all the dark forces her passion can muster to save the ones she loves the most .. .