Lisette Ashton 
The Black Widow [EPUB ebook] 

Spurned by her husband, and cheated of her inheritance, the Black Widow feels justified in seeking revenge. Determined to lay claim to the Elysian Fields, a health farm with a unique doctrine of sensual pleasure and erotic stimulation, the Black Widow wants what”s rightfully hers.
Indulging a new-found passion for sexual domination, she is only too pleased to deal with those that get in her way. Punishments are cruel and explicit as she forces subordinates to do her bidding. Only the brave dare beg for mercy and their cries invariably go unheeded. Caught in the middle of this hostile takeover, private investigator Jo Valentine find herself entangled in the Black Widow”s web.