Miki and her husband had been living a sexless life for a long time. One day, her son Hiroshi, who is in his third year of working, was sleeping naked with tissue between his legs after masturbating. "What a helpless boy..."Miki tried to wake him up, but when she picked up the damp tissue between his legs, her sexual desire was stimulated and she ended up masturbating while smelling Hiroshi's semen. Miki then woke up the sleeping Hiroshi and started talking dirty to him to make him ejaculate, making him masturbate...