With only two months left until my wife's birth, my mother-in-law Mayuka came to Tokyo from her hometown to take care of her. Thanks to Mayuka, the atmosphere in the house was a bit lighter, but there was still a lot of tension between my wife and I. My wife found out that I was secretly masturbating, and I was in a situation where I was forbidden to do so. My wife had caught me masturbating in secret, and I was in a situation where I was forbidden to do so. Meanwhile, I can't resist Mayuka's charms, so I...