Maid to Hunger by Piper Fox

When the vampire Lord Constantine returns to oversee his favorite haunt, Castle Belan, he’s shocked to discover a quirky, curvy woman has claimed sanctuary in his home while he was away.
Despite her anxieties over his blood-drinking dependency, Daria Stoica seeks sanctuary with Constantine after a trusted witch delivers a dark portent that scares her even more than the vampire’s blood lust does. To keep busy, Daria has taken on maid duties, exploring Castle Belan, and also exploring her newfound guardian.
Daria’s not the only one curious about the new living situation, but Constantine’s focus is more often on the swishing of the adorably distracting Daria’s hips, rather than impending threats that could bring about the prophecy looming over them both.
When her mysterious heritage is revealed, both Constantine and Daria have to come to terms not only with being fated mates, but also the danger lurking in the dark.