[Mosaic removed] Mr. and Mrs. Morisawa have been married for three years and want to have a child soon. However, she was having trouble conceiving children. At that time, when Kana is caring for her bedridden stepfather as usual, her stunned stepfather feels like a child and makes him suck her breasts. Kana feels a strange sense of pleasure from her, and from then on, she continues to display her "motherly" qualities towards her father-in-law. Then, her stepfather's dick swells up, which in turn stimulates Kana's sexual desire. Kana voluntarily invites her father-in-law into her secret area, and even though he is attacked by her sense of immorality, he shakes her hips...