A lewd stepfather who has retired and is now free to join his wife

A lewd stepfather who has retired and is now free to do so sexually harassing his wife, who lives with him. Unable to see her son and wife who can't have children at all, her stepfather asks Yui, "Shall I help you have a baby?" Yui is confused by her stepfather's sexual desire, but she is not satisfied with her husband's sex... One day, while Yui is masturbating, her father-in-law finds her in the picture, and despite being humiliated, she is made to cum many times by her intense, lewd sex. And she was poured in a lot of semen from her stepfather, who has the same blood type as her husband.