I visited the house of a friend's wife (Sumi) after she asked to talk. As we drank and chatted, I gradually started feeling horny. She was beautiful and slender, yet had large breasts—an alluring, mature erotic presence. She slowly became aroused too, and the atmosphere turned increasingly sexual. Despite knowing she had a husband and I had a wife, I somehow got even more excited, and before I realized it, I'd made love with her until my sperm ran dry.