A trivial argument with my wife escalated, prompting my beautiful stepmother, Yumi, to come over to mediate. Despite being my mother-in-law, Yumi radiates elegance and grace, resembling a true noblewoman—her poise and gentle warmth standing in stark contrast to my wife's constant complaints and bitterness. I found myself helplessly drawn to her kindness. That night, Yumi decided to stay over. Accidentally, I caught a glimpse of her naked body. She desperately tried to cover herself, blushing shyly—and in that moment, my heart began to race with desire.