Yumika has a kind husband and stepson. She wants to have a child soon, but the days of sexlessness continue. One day, while she was feeling frustrated, she witnessed her stepson's huge dick and became aroused... In the evening when her husband was asleep, she begged for a sweaty night visit and raw creampie sex as a practice for making a baby. "You and my dad have the same DNA, so no one will find out if we have a child." She knows it's wrong, but... her sexual desire can't be suppressed! They exchange bodily fluids and semen and cum inside each other many times! Forbidden child-making sex with her stepson that she can't tell her husband about.