Sumie Takayanagi

She is the wife of Tomizo Takayanagi, the old and lusted father in law of series' female protagonist Mitsuko. Forced to marry Tomizo due to a debt, she was used by her new husband as a tool for the sexual urges of himself as well as his household's guests. Because of this constant abuse, she begun to crave sexual intercourse on her own will. All of these things led to complicated consequenses amongst herself and the other family members after the arrival of newfound household bride Mitsuko.