[PARATHD-4322] Forbidden Sex with My Serious Little Sister Who Goes to Nursing School - When I became a practice dummy for her practical training, she thoroughly washed my dick and made it fully erect! I couldn't hold back and put it in (Censored)

My father, me, and my sister live together. My younger sister, Yuzu, is attending nursing school to become a nurse. She says she'll be working with a lot of men during her nursing practice, so she wants to practice with me and my father. Of course, that's going to make her hard. My cute little sister doesn't have a boyfriend and isn't used to being around men. Because of that, she's not comfortable with the male patients during her practice. She'll have to shave them and see their genitals, so she asked my father and I if she could be her practice partner. She shaved me as her practice partner.