Since her mother-in-law’s death, Mika’s father-in-law sank into despair. Worried, her husband brought him to live with them. He stayed unchanged, locked in his room, not eating. Today, with her husband on a business trip, Mika cares for him alone. Long without sex, her desire surges, and she masturbates to ease it. Her father-in-law catches her. Overwhelmed by loneliness, he loses control. 'Just 10 seconds, let me put it in, please?' Without waiting, he thrusts his cock deep inside her. Exactly 10 seconds later, he stops. Next morning, unsure how to face him, Mika plans to leave. But she notices breakfast is gone—her father-in-law appears brighter, less depressed. Knowing she’s lonely too, he wants to satisfy her sexual needs. Though she resists at first, their bodies sync oddly well, his every thrust bringing pleasure that erases her guilt. They seem fated. Naturally, he cums deep inside her repeatedly. Later, Mika gets pregnant. Her husband, overjoyed, pampers her, throwing a party. But Mika knows the baby isn’t his...!!!