JUQ-939 _Going to my grandmother's house, I was so horny that I broke a jar and was caught by my mother-in-law

Because I wanted to see my grandchild soon, I decided to move in with my wife's parents - a generous father-in-law and a charming mother-in-law named Miki. I wanted to live up to that expectation... but then I gradually felt bored with my wife who only cared about "sex on the day of ovulation", causing me to increasingly have to relieve myself alone. And then one day, I accidentally didn't close the door so I was looking at the jar when my mother-in-law Miki discovered it. At first, she showed sympathy, but her eyes gradually turned predatory, and I had to face the true nature of my mother-in-law - who was once called "the bad girl of Chiba"...