I live in a dormitory and came back to my parents' house for the first time in a long time during the long holiday. My parents and grandfather live in my parents' house. My grandmother passed away a year ago, and my mother was taking care of my grandfather who was bedridden. My father is interested in family and is just a drunkard. One night, I heard a strange voice coming from my grandfather's room. Did a stray cat get in? It was a sweet voice. I was curious, so I quietly opened the sliding screen. And then...inside the room, my mother was happily stroking my grandfather's dick while my grandfather was sucking on her breasts...