When I went back to my wife's parents' house, my beautiful sister-in-law was waiting for me. She seduced me forcefully, boldly, and persistently... I was confused, but my dam of reason was on the verge of bursting. Even though I knew it was wrong, Kokoro was swayed by her charm, which my wife did not have, and I finally had sex with her and came inside her! And when I was shocked to find out the reason why she was obsessed with me, it was already too late, I was so fascinated by my sister-in-law...