With two months left until my wife's delivery, my mother-in-law, Mayuka, came to Tokyo to take care of me. Thanks to Mayuka, the atmosphere in the house became more relaxed, but even so, there was still a tense atmosphere between my wife and me. I was in the middle of being caught masturbating by my wife and being ordered to stop. In the midst of all this, I couldn't resist the seductive Mayuka, and I smelled her underwear while she was taking a bath. I was so engrossed in the underwear that I didn't even realize Mayuka had noticed...