When I was young, Sara-san came into our home as my stepmother. However, it turned out that Sara-san was a 'male mother' with a penis. I found this out when I accidentally saw my father inserting his penis into Sara-san's. Ever since that day, I have masturbated countless times while remembering that reverse anal sex. Then, three years after my father passed away, as we gradually grew closer in our life together alone, we finally crossed the line...
