In the film The Babysitters, Katherine Waterston takes on the role of Shirley Lyner, a high school student who starts a babysitting service that caters to the desires of married men. The movie explores the complex relationships and moral dilemmas that arise from Shirley's unconventional business. Waterston's performance in The Babysitters is praised for its nuance and emotional depth, capturing the complexities of Shirley's character. The film delves into themes of power, manipulation, and the blurred lines between right and wrong. Katherine Waterston's portrayal adds an extra layer of complexity to the story, making The Babysitters a thought-provoking watch.