Yuri's son has always loved his mother's big butt. I was masturbating by applying oil to my mother's buttocks who was sleeping because of that. Yuri also has a strong libido, and her daily routine is to masturbate with vegetables in the kitchen. My son was watching it. One day, for the first time in a long time, my father, who was away from home, came home. The son attacks Yuri from behind so that his mother's butt will not be taken. "Mom's ass is mine. I don't want to give it to anyone!"