He married the Kase family's only daughter and is a "Masao" (a man who has a mother-in-law). Madoka, her mother-in-law, has always found her son-in-law irritating. Today, while everyone was enjoying a meal together, she lashed out at him for fiddling with his phone. The awkward-looking son-in-law was trembling with anger. The next day, while Madoka was sleeping alone because her husband was away on a business trip, she woke up to something moving. When she opened her eyes, her son-in-law, with bloodshot eyes, was embracing her and sucking her nipple. Madoka jumped up in surprise and told him to stop, but he didn't stop and his caresses intensified. Madoka resisted, but her strength was no match for his. Since it had been a while since she'd had sex with her husband, her lower body was surprisingly wet. Then, as if to show off his hot, hard penis, he thrust himself into her. In that moment, Madoka lost her temper. Her son-in-law's thrusts intensified, digging into Madoka's insides, stirring her up, and Madoka was overcome with such pleasure that she could not resist. The son-in-law's thrusts intensified, and the moment he pulled out, hot liquid splashed onto Madoka's ass. Madoka was immersed in the pleasure of this powerful act, something she had never experienced with her husband. A few nights later, Madoka had sex with her husband for the first time in a long time. Unusually for her, Madoka asked her husband for some intense sex, but perhaps due to her age, he failed to ejaculate, leaving both of them unsatisfied. Afterward, Madoka headed to the bathroom, where she was soothing her incompletely sated body, when her son-in-law came in. Madoka's face was already a woman's as she was embraced by her son-in-law. Despite her apparent reluctance, she knelt before his already hard erection and unhesitantly tasted it in her mouth...