[HUNTB-625] If my sister-in-law finds out that I'm watching AV, it's a terrible thing! I suddenly found myself in a shared room with my sister-in-law. No! (Censored)

Due to family circumstances, I ended up sharing a room with my sister-in-law. One day, I was secretly watching AV when my sister-in-law fell asleep, but my sister-in-law found me! Of course, I was also seen to be shiko! However, my sister-in-law peeped into the AV and my masturbation and started masturbating secretly, and furthermore, ``I can't stand it, I can't help it...'' Masturbation is not enough and I've been greedy for my cock! I saw the worst abomination of my life, but instead I got to have sex with my sister-in-law!