"My Mortal Enemy" is a novella written by American author Willa Cather, first published in 1926. It is a poignant and introspective work that explores themes of love, regret, and the passage of time. The story is narrated by Nellie, who reflects on the life of her cousin, Myra Henshawe, a woman who had been the subject of gossip and speculation due to her complex relationship with her husband Oswald. Myra is portrayed as a woman of strong will and passion, whose choices in life have led to both fulfillment and regrets. The novella delves into the contrast between personal desires and societal expectations. "My Mortal Enemy" is a short but emotionally rich work that examines the consequences of choices made in the pursuit of personal happiness and the price one may pay for deviating from conventional norms. It showcases Willa Cather's talent for character exploration and her ability to capture the human experience with depth and sensitivity.