The Space Between Us by Thrity Umrigar

Set in modern-day India, it is the story of two compelling and achingly real women: Sera Dubash, an upper-middle-class Parsi housewife whose opulent surroundings hide the shame and disappointment of her abusive marriage, and Bhima, a stoic illiterate hardened by a life of despair and loss, who has worked in the Dubash household for more than twenty years.