On the third anniversary of my father-in-law's death, my wife and I went back to her parents' house. Momoko, my mother-in-law, was beautiful no matter how often I saw her, and her defenseless appearance always made my heart race. Then, one night, I couldn't resist and made a move on my wife, but she refused and ordered me to abstain from sex for the rest of the trip. I reluctantly intended to abide by her orders, but when my relatives offered me some alcohol, I collapsed with my sexual desire at its maximum. Then, when I woke up, my rational brakes had broken and I jumped right into Momoko's plump ass, right in front of me...