When she hears about the engagement of her sister, Esther, to one of San Francisco's wealthiest merchants, 25-year-old Amelia Lander decides it is high time she obeyed her mother's last wish - that she watch over her younger sister. Amelia leaves her teaching job in New York City and travels by train to San Francisco, where she loses no time in calling on Esther and her new husband, Samuel Allen, and providing them with proof that she is Esther's sister and that her existence has been intentionally concealed by their father for 17 years, since Esther was a toddler. Samuel suggests that Amelia live with them, but when Esther says something impolite and Samuel tells her - in front of Amelia - that she can expect to be soundly spanked for her rudeness, Amelia is shocked. Samuel informs Amelia that he will run his house as he sees fit, and when she responds with insults and defiance, Amelia soon finds herself over the knee of Samuel's business partner, Michael Sullivan, for a long, hard spanking on her bare bottom. In spite of her shame and fury, however, Amelia cannot help but be drawn to the man who chastised her so thoroughly. When she learns that her father is once again up to no good, Amelia runs straight to Michael with the news, and he and Samuel form a plan to stop him. But can Amelia bring herself to obey Michael and stay out of the way, or will her foolhardy actions cost the life of the man she has reluctantly come to love? Publisher's Note: Their Firm Men is an erotic romance novel that includes spankings, anal play, sexual scenes, and more.