Their Double Lives by Jaime Lynn Hendricks (Author)

A down-on-her-luck waitress at a posh New Jersey country club, Kim Valva couldn’t be living a more different life from the carefree socialites she serves. Her live-in boyfriend recently cheated on her, her social life is in shambles, and her dog needs a life-saving surgery that she can’t afford. Then her luck seems to change when a mysterious figure identifying themself only as The Stranger contacts her with an offer she can’t refuse: Put a pill in the new member’s drink and, when he dies, she’ll have enough money to fix her dog and her life.