Mother and son have sex in 2 seconds after father goes out

Fumiko has had a relationship with her only son Katsu. In order to hide it from her husband, Katsu was meticulously involved in the pleasure of sex, but Katsu became obsessed with the pleasure of sex and became bold. Fumiko is worried that it would be strange for her husband to find out at any time. However, as Fumiko's body continued to be held, she couldn't control her sexual desire. Today, the next moment when her husband went out, the two exchanged a passionate kiss...