My sexually voracious stepmother, who has been impregnating my father, secretly begs me to ejaculate inside her every time. (Nami Okimiya, JUR-785)

My dad's new wife, Nami, is a beautiful woman, closer in age to me than my dad. Honestly, I don't know how to get along with her, so I feel confused every day. Also, it seems there's a condition to their marriage: Nami always insists on unprotected sex during her ovulation period, but my dad can never keep up with her, so she always seems frustrated. Nami used to suffer a lot whenever she saw me having morning erections, but after she and my dad tried to get pregnant, she finally started insisting on unprotected sex every day…