They were a married couple who made love about three times a week after getting married. When I went on a long business trip, something inside me changed. Of course, I wasn't cheating, and my wife wasn't the type to do such a thing either. On the day I returned home after a long absence, we passionately desired each other, and I became incredibly aroused. Although we continued having sex after that, for some reason, I found it harder to get excited. Perhaps because of this, we gradually reduced the frequency—first to once a week, then down to once a month. One day, my wife tried to initiate sex, but I turned her down, claiming I was tired. She quietly lay down on the bed looking lonely, and strangely, I felt a little pleased.