Demon of Desire (Whispering Valley, Book One)

First in the Whispering Valley series. The only consolation Sin has for moving into her late great-aunt's creepy Victorian house is the handymen who come with it. Triplet vampires Baen, Gower and Enos are yummy enough to tempt her from her self-imposed celibacy and make her forget she's well on her way to becoming a crazy cat lady. The brothers instantly recognize Sin as their mate, but realize they need to ease her into the idea of being loved by three vampires. Then a sex-craving demon takes control of Sin's body and seduces the men, forcing them to make a rash decision with her life.