It's been five years since my affair with my son's friend, Kitayama, began. That night, after we had a huge fight after discovering my husband's third affair, Kitayama comforted me as I felt down. Then, with a serious look in his eyes, he confessed to me, "I want to get revenge on you for cheating on me. Is it okay if it's me?" Though I felt guilty, I crossed the line, wanting to respond to Kitayama's feelings. And then...