A family is torn apart in James Oliver Chapman's emotional memoir, "How to Lose Your Wife to Another Woman."

James and his wife Molly have the kind of life others can only envy. With a precocious fourteen-year-old daughter, a gorgeous home, and a red-hot sex life, their marriage of sixteen years seems better than ever-until Molly reveals she has been secretly harboring an attraction to women. Eager to explore that part of her sexuality, she receives James's permission to pursue sexual relationships with women-and soon encourages James to do the same.

While at first liberating, the...