Living together as a married couple in my parents' home. After my father got laid off, he became an alcoholic, but my mother stayed by his side, devotedly caring for him. Seeing her dedication, my wife once told me, "Let's never break up." However, in our private time, my wife always rejected me and quickly went to sleep. As this continued day after day, I accidentally discovered my parents' secret. My father casually came inside my mother, then went out drinking late into the night. Afterward, my mother quietly pleasured herself. The next day, the house was empty. I noticed my mother sleeping. As I covered her with a futon, memories of her masturbating the previous night flooded my mind. Unable to resist any longer, I embraced her while she slept and began caressing her body.