Under the Influence by Joyce Maynard (2016)

Drinking cost Helen the custody of her son. While working to overcome her addiction, an eccentric wealthy couple, Ava and Swift Havilland, befriend her. The Havillands are wealthy philanthropists who established a charity devoted to rescuing dogs. Their home is filled with fabulous friends, expensive art, and over the top parties. As Helen increasingly falls under the Havillands’ influence by running errands and doing chores for them, Ava and Swift promise to help Helen regain custody of her son—but at what cost?

Joyce Maynard’s Under the Influence is an engrossing, can’t put down read until the very last page.