At 34, I was happily married to my 25-year-old wife, raising our young daughter together. But one day, my wife was hospitalized, and my mother-in-law, Kozue, came to stay with us to help with housework and childcare. Unlike my wife, Kozue carried a mature, voluptuous charm that grew stronger with age, and I found myself irresistibly drawn to her sensual allure. Losing all reason, I gave in to my desires and began a forbidden affair with my stepmother.