After accidentally encountering the scene of her daughter-in-law Aoi changing clothes with big round breasts and a slender body, the lust in her father-in-law began to appear. He thought that his son married his wife to take care of his family and his aging father, but he did not know that his wife was a sex slave for him. The times when he went to work were also the time when the wretched old father tortured his filial daughter-in-law, her screams and whinings seemed to add strength to increase the intense lust in him. After many times of suffering in such humiliation, she still only knows how to keep quiet, perhaps because she is afraid of her old father, but it is also possible that she is feeling happy to have sex with her lewd father-in-law.