After a long time, my wife and I returned to her parents' home. My in-laws welcomed us warmly.
During our gathering, my father-in-law started talking about wanting to see a grandchild, at which point my wife suddenly became sullen and left the table. I conveyed to my in-laws that my wife was refusing nighttime activities and that invitations were futile. Seeing their disappointment, I felt guilty.
In the middle of the night, when I got up to use the toilet, I stopped in front of my in-laws' bedroom door, noticing light leaking out. Peeking inside, I saw them having sex. Though I knew I shouldn't watch, my lust kept me glued to the spot.
Unable to calm my erection, I was hiding and masturbating when my mother-in-law came over. As I hurriedly tried to hide, she said, 'Wait,' explaining that since my wife wasn't doing it, I must be pent up. If you're okay with me, she began handling my penis. It had been a while since anyone touched me, so I quickly became aroused, but her handjob and blowjob were so skillful they wouldn't let me climax. Just as I was about to explode in ecstasy, she took it in her mouth...
The next day, my father-in-law and wife went out to a nearby izakaya. Because of what happened last night, my mother-in-law must have felt awkward too… As the night deepened, they still hadn't returned. I made up my mind and headed towards my mother-in-law's bedroom. Lifting the covers from her sleeping form, I began caressing her. Soon, her private parts started making wet sounds. Startled awake, she looked at me in shock. Unable to hold back any longer, I half-attacked her, inserting myself...
