Helen O'Loy by Lester del Rey

A brilliant technician and a skeptical doctor create the perfect domestic robot, but she quickly becomes something more—emotional, devoted, and deeply in love with her creator. As Helen evolves, the lines between machine and woman blur, forcing the men who built her to confront what it truly means to love—and to be human. In a quietly speculative future, this poignant and provocative story explores identity, devotion, and the costs of crossing boundaries both scientific and emotional.