Lina exercises at home as a daily routine. My son gets an erection when he sees such a sweaty mother. Rina sees her son Ji-Po who is erected when she sees herself, and gets excited by the big cock while being surprised and confused. That night, Rina masturbates next to her husband's sleep. And the son who comes to look into the situation. When he meets his mother, he leaves, but Lina follows him ...