3 months ago, my father suddenly remarried. His new wife, Ai, was about my age, so the feeling of living under the same roof with her was strange. One day, I found out that they were trying to conceive, and it wasn't going well, and I made myself think that I would be willing to fuck Ai in my father's place, if I could. My wish quickly came true when Ai entered my room and started jerking me. It turned out that her sexual frustration could do nothing but pile up, and she was determined to get pregnant using my cock instead of my useless father...