My Mortal Enemy is the eighth novel by Willa Cather and was published in 1926. It is often considered to be Cather's darkest work and revolves around the disillusion of the notion of marital bliss. The story revolves around Mrya Henshawe, a woman who wonders if she has made the right decisions in life. As she spends the holidays in New York City, she sees acquaintances from the past that put her in a depressed mood.
Myra made the bold choice in her youth to marry for love and, in doing so, forfeited a sizable fortune from her uncle. This is a classic romantic trope, but My Mortal Enemy shows this story from an inverted perspective, focusing largely on Myra's regret where her marriage is concerned.