On my way back from going out, I saw my son's wife, Yasuko, wearing slightly more revealing clothes than usual and entering a nearby apartment building. Out of curiosity, I followed her and saw her entering a room with a young man, hugging him. I hurried back to my house and peeked at the apartment. As expected, they were having sex. Disappointed, I asked Yasuko about what I had just seen when she returned home. She told me that she had been unfaithful because she was dissatisfied with the decrease in the frequency of her relationship with my son. I immediately contacted the man she had been unfaithful with and broke them up. I looked at Yasuko, who was dejected and hanging her head, and wondered if her voluptuous body was aching, and I couldn't help but embrace her. I lost control and suddenly became calm, apologized to Yasuko, and returned to my room. The next day, I saw Yasuko cleaning in a neat outfit and became aroused again, hugging her a little roughly. Yasuko resisted a little but seemed to give up and accepted my caresses. As I teased her persistently, Yasuko trembled and reached orgasm. I savored her female genitalia for the first time in a long time and inserted myself into her. When I thrust violently, Yasuko came immediately. For several days after that, I felt a little awkward, but suddenly Yasuko said that she probably would be entertaining someone today and asked me to peek. I peeked to confirm what my son's behavior was like, but I realized that it was no wonder Yasuko had an affair in that state. I called Yasuko and told her that I had seen her behavior with my son, and that it wouldn't satisfy her. I let Yasuko touch my erect crotch. Yasuko grabbed my hand and led it to her genitals, saying she couldn't hold back. I nodded silently and exchanged a kiss with Yasuko...