Wife's mother, Akasaka Runa, JUX-521

Runa, the mother of her daughter Emi (Izumi Kaede), who is about to marry into a good family, lives a fulfilling life. She also has a good relationship with her kind-hearted son-in-law, Satoshi. However, her loneliness has somehow turned into a crush on Satoshi... Even though she knows he is her daughter's husband, she cannot suppress the physical urges she feels as she realizes he is a man, and she suppresses her burgeoning sexual desire by indulging in masturbation. But, in that moment of distress, Satoshi comes to her to discuss a sexless life with Emi...