My wife and I returned home after a long time. My mother, who had been down since my father passed away, looked full of energy when we met again after a long time. That night, I suddenly woke up and witnessed my mother bathing. I was excited by her alluring naked body and couldn't sleep anymore. The next day, I went shopping with my wife, but I forgot something and went back to get it. Then, I saw my mother, who was in a disheveled state, kissing a familiar sake shop owner. I couldn't make a sound and just gripped my hardened crotch…