My wife's sister came to help out when my wife was hospitalized. My husband's sister-in-law, Reika, is beautiful, kind, and caring, so she does all sorts of things for her lonely brother-in-law, and the two of them become intimate. Even though my sister-in-law is a married woman... I end up having intense sexual relations with her while my wife is away! I'm drowning in forbidden pleasure that must never be discovered!