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. Sae Tsubaki

I had been living alone in a dormitory near school, but I came back to my family home for the first time in a while. My parents and grandfather live there. My grandfather had been bedridden since my grandmother passed away, and my mother was taking care of him. My grandfather would call out to my mother in an almost inaudible voice at every opportunity to have her attend to his needs. Then one night, I heard a strange noise coming from my grandfather's room. Mixed with a groaning sound, it seemed like a sweet female voice. Curious, I quietly slid open the shoji screen. And there... I saw my mother writhing in apparent pleasure as my grandfather sucked on her breasts...