A couple has been sexless since their child was born. When I was spending my days in agony, my mother came to see my baby's face. At that time, the son accidentally sees his mother naked and becomes excited. ``It's definitely not good.'' The more I thought about it, the harder my son's crotch became for some reason. I know it's definitely not good, but I can't resist "forbidden sex." Because it's forbidden, I feel a pleasure that shoots through my brain... How will the mother react to her son's reckless behavior?