My wife and I returned to her parents' house after a long time. Her parents welcomed us warmly. During a family gathering, my father-in-law expressed his desire for a grandchild, causing my wife to suddenly become upset and leave the table. I had to explain to my confused in-laws that my wife was refusing intimacy and couldn't be persuaded. I felt guilty about their disappointment.
Later that night, I woke up to use the restroom and stopped outside my in-laws' bedroom, noticing a light coming from under the door. I peeked in and saw them engaged in intimate acts. Despite knowing I shouldn't be watching, my sexual hunger kept me glued to the scene.
Unable to control my erection, I masturbated in hiding. My mother-in-law caught me and, instead of scolding, said, "Wait, your wife isn't here, so you're bound to build up, right? If you want, I can help." She then began to pleasure me, and despite my initial excitement, her skillful and wet oral sex prevented me from climaxing. Just as I reached the peak of my arousal, she caught my release in her mouth.
The next day, my father-in-law and wife went to a nearby izakaya. I'm sure my mother-in-law was also feeling awkward about last night's events. As the night deepened, they still hadn't returned. I made up my mind and went to my mother-in-law's bedroom. I gently lifted her blanket, caressing her. Soon, I heard the sounds of her clitoris being stimulated. She woke up, surprised. I couldn't hold back any longer and, almost aggressively, inserted myself into her...
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