JUL-355 Wife had an affair with a gym trainer

Haruka and I have been married for three years. Lately, she's been wearing clothes that she used to be able to wear, but now they're all too tight. So she wanted me to go to the gym with her to get back in shape. I really don't like working out at all. At first I indulged her, I practiced for a week, but I couldn't continue anymore and gave up. She was the only one left to practice with the coach, who was tall, had toned muscles, and was very good at talking. I felt the distance between the two of us getting closer and closer, thoughts of him sleeping with his wife constantly appearing in my head. I decided to buy a tape recorder and put it in my wife's handbag. At night when my wife just got home and went to the bathroom, I took out the recorder to check. And then I discovered the truth....