My wife and I are a family of three living with my wife's mother, my mother-in-law, Kozue. We decided to renovate our room, but due to the work, we ended up sleeping in the same room for about a week. On the first day, I was nervous and couldn't sleep, and I couldn't take my eyes off my mother-in-law's big breasts, which I could see through my wife. I thought about sneaking up to her and grabbing her breasts, but I stopped myself. On the second day, my mother-in-law's huge breasts were still shaking through my wife. My wife was sleeping soundly, and I couldn't resist and went next to my mother-in-law. I was enjoying her soft breasts, but I was curious about her crotch, so I quietly slipped my fingers in. I couldn't contain my excitement at the nectar that was slowly overflowing, so I quickly left the place and ran to the bathroom to stroke my dick. The next morning, my mother-in-law whispered to me, who was sleep-deprived, that she wasn't angry about the previous day. Then, at night, I was woken up by a pleasant stimulation as I was sleeping quietly. When I looked, my stepmother was burying her face in my crotch and sucking me. I was in a panic, but she said, "You did that to me yesterday, didn't you?" and took my semen in her mouth and drank it all...