When I Returned Home, I Found That My Grandfather And Mother Were Having Sex. What I Saw That Day Changed Me Into A "mature Woman Lover" For Life. Touko Yoshinaga

I left my hometown to live in Tokyo, and used a long holiday to return to my parents' house for the first time in a while. My parents and grandfather live there. My mom is caring for my grandfather, who has been depressed and half-bedridden since my grandmother died. My dad has no interest in the family and is always out. Then one day, a strange sound leaked from my grandfather's room. It sounded like a cat in heat. Curious, I quietly slid open the shoji screen. And there... inside the room was my vulgar mother, moaning as she had her breasts devoured by my grandfather, who was also lovingly playing with his own cock.