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Mari, who is troubled by a sexless marriage with her husband, is depressed because she feels unattractive, so her father-in-law suggests that she seduce him by wearing bold underwear. Her father-in-law becomes aroused by the sight of Mari in her underwear and keeps asking her to "please...let me put it in for just one minute," until she finally gives in and allows him to insert it for just one minute. Even in the short one minute, her reason and pleasure struggle with the pleasure of her father-in-law's insatiable cock, which is unbecoming of his age, and his hard thrusts, and even after more than a minute has passed, her hips continue to move on their own, leading to a relationship where she continues to insert it. In the end, not caring that her husband is in the next room, she pushes her father-in-law down and shakes her hips until she climaxes, saying, "I want your cock, father-in-law..."