Miki, who lives with her married daughter and son-in-law, has a good relationship with them, but her only complaint is the lack of intimacy with her husband, which has been building up her frustration. During this restless period, she accidentally caught a glimpse of her son-in-law, Shinichi's, massive cock... She was captivated by his impressive manhood, and unable to contain her rising desire, she couldn't help but cum him relentlessly. Shinichi, who had been sexless with his wife, couldn't resist his mother-in-law's constant, seductive temptations, and eventually gave in to her voluptuous body, devouring her with his mouth...