GVH-357 Stepmom's Real Sex Education. Miki Shiraishi.

Miki, a housewife who remarried with her new husband and started a new life with her son, Junpei. Junpei also became attached to her husband, to the extent that he considered her to be her blood-related father and son. However, because of their close relationship, her husband teaches Junpei her extreme sexual knowledge. Worried about Junpei's future, Miki tries to give her proper sex education in secret without telling her husband. How to kiss, the mechanism of female genitalia, and even insertion. She uses her plump body and her big tits generously to teach her son how to love her sex.