A son who wanted to fuck his mother in front of him more than an AV, and a mother who went crazy with her son's erect cock while watching an AV. Her son's favorite AV broke the parent-child relationship... However, in a way, it was also the AV that made the parent and child happy. Watching AV while saying "For education..." stimulated the instincts of her mother and her son, making her mother a female and her son a male.
