Kyoko and her husband cherished their intimate life together. One night, as they were spending time together, their son secretly peeped through the crack of the door. The next morning, after her husband left for a business trip, Kyoko went to her son's room. There, she found him masturbating alone. Shocked by the size of his erect penis, she entered the room. The son quickly tried to cover himself with his pajamas, but Kyoko said, "Let me help you," and began stroking his cock. Later, while preparing breakfast, the son suddenly hugged her from behind and whispered, "Mom, I want to be inside you." In the evening, when the son returned from work, he embraced her again the same way. Though initially hesitant, Kyoko gradually began accepting her son's feelings...