ROE-567 When I went home, my grandfather and mother were having an affair. What I saw that day turned me into a 「MILF lover」 for life―. Nagamine Tsubaki

I left my hometown to live in Tokyo and used my time off to return home for the first time in a while. My parents and grandfather live at home. After grandmother passed away, grandfather fell into despair and became half-bedridden, so mom takes care of him. Dad has no interest in the family and is always out.
One day, I heard a strange voice leaking from my grandfather’s room. It was unmistakably the sound of arousal. Curious, I quietly opened the sliding door to see… Inside the room, my mother was having her breasts sucked and lovingly stroking my grandfather’s cock.