Kindan no kioku: Hitozuma ga moeru toki

禁断の記憶 人妻が萌えるとき

Also known as 乱れ若妻 いやらしい指, Midare wakazuma: Iyarashii yubi

One day, Kazune visits the hospital to deliver something Hirotaka had forgotten. However, there she witnesses her husband having an affair with Misa. Hirotaka passionately caresses young Misa's body. Instead of anger, Kazune feels a strange sense of relief...