My stepmother is always craving a big dick from my son-in-law.

Mako, a mother, begins living with her daughter and her husband after her husband is away from home alone. The daughter and her husband, who were initially thought to be happy, were actually incompetent due to the huge cock of her son-in-law Kunio, and they were unable to hide their surprise. As soon as Mako witnessed the size, her desires lie deep inside her body ignited her... Despite the fact that "the mother is responsible for the daughter's misconduct," she approaches her with a voluptuous body and devours her big dick. Unable to resist the intense temptation, Kunio continues to be swayed, and her son-in-law, who has fallen into forbidden pleasure, begins to seek a stepmother herself...