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With just two months left until my wife's birth, my mother-in-law, Ayano, came to Tokyo from her hometown to support her unstable wife. Ayano's cheerful personality brought brightness back to our home, but my wife banned me from masturbating because I let my guard down. In order not to damage my relationship with my wife, I refrained from masturbating for a day, then three days, then a week... Finally, I reached my limit and reached for my mother-in-law's underwear while she was taking a bath, and she saw me masturbating while sniffing it...