To prevent his younger brothers from inheriting the family fortune, the eldest son assigns his wife, Kanna, to care for his father. Believing her father-in-law's feigned illness, Kanna diligently nurses him. Unable to refuse his requests, she even ends up giving him handjobs. Her stunning reactions as she gulps at the sight of his massive cock are unforgettable. Secretly falling in love, she is caught spying by the youngest son, who blackmails her into having sex. She climaxes repeatedly, transcending pleasure from the huge cock carrying her father-in-law's genes. In a threesome with the second son and her father-in-law, her true nature is exposed, revealing her wild, lustful side as the depraved wife loses control.