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. Confused, my in-laws listened as my wife explained that she refuses nighttime activities and that invitations are 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 horny eyes couldn't look away.
I couldn't contain my erection, and as I hid and masturbated, my mother-in-law approached. Hurriedly trying to hide, she told me to wait, saying, 'Since your daughter won't do it, you must be pent up. If you're okay with me...' She began to stroke me. It had been a while since I'd been touched, and I quickly became aroused, but her handjob and blowjob were so skillful that they wouldn't let me cum, and just as I reached the brink of orgasm, she took it in her mouth...
The next day, my father-in-law and wife went to a nearby izakaya. Perhaps due to last night's events, my mother-in-law seemed awkward too… As the night deepened and they still hadn't returned, I made up my mind and headed towards my mother-in-law's bedroom. Lifting the covers of her sleeping form, I began to caress 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...
