The Housemaid’s Secret
by Frieda McFadden.
Millie’s been hired to cook and clean for a wealthy New York couple in a luxurious penthouse opposite Central Park. Though she’s only met the husband; the wife, Wendy, stays in her bedroom, and Millie is told not to bother her since she’s often ill.
Millie becomes increasingly concerned about Wendy — expecially when she sees Wendy’s bruised face and concludes that she’s being abused. Millie can’t stand aside: when Wendy asks for help, Millie steps forward.