After the death of his mother-in-law, Mr. and Mrs. Hatano started living together with their father-in-law. Since her marriage, her wife Yui has played a M woman who has always served a man to satisfy her husband's desires. However, one day while taking care of her father-in-law, she happened to witness her father-in-law's erection. When I saw my father-in-law erecting even though I could not move satisfactorily, something burst in her Yui.
