the mother of a wife who went tokyo from morioka

She was the wife's mother-in-law who came to her daughter and couple's house from Morioka, where she had a family home. However, since the wife was hospitalized, her mother-in-law and daughter-in-law's life began for a while. that she was looking at her body to see her mother-in-law unconsciously resembling her wife... for some reason, i'm fascinated by the body more than my wife... It inflicts a jealous delusion. the physical relationship with my beloved wife's mother... but my motherinlaw doesn't have any jealousy... In this way, the life that is reminiscent of their greed begins to fall in love with forbidden music!