Upon returning home, my grandfather and mother were making love. What I witnessed that day made me a lifelong "mature woman enthusiast." (Toyota Reika ROE-452)

I, an office worker in Tokyo, took a long vacation to return to my hometown. My parents and grandfather lived there. After my grandmother passed away, my grandfather, depressed, lay half-reclined in bed, and my mother was taking care of him. My father was indifferent to his family and was always away. One day, strange noises came from my grandfather's room. It sounded like the exaggerated roar of a ferocious beast. Curious, I quietly opened the shoji screen. And then… there was a lewd scene in the room: my mother was being greedily sucked on by my grandfather's nipples, while he lovingly played with his penis…