A wife with a strong libido is so frustrated by the sexual incompatibility between her and her husband that she unconsciously flashes her panties in front of her father-in-law, who lives with her, while wearing a miniskirt. Realizing their mutual arousal, the wife and father-in-law sneak closer to each other, avoiding the eyes of her husband and mother-in-law. The wife's sexual desire explodes when she sees her father-in-law's lower body, who is more energetic than her husband. A special feature of 15 married women who indulge in sex with their father-in-law in the bathroom, kitchen, and living room.