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Her father-in-law has been living alone for a long time, having lost patience with her for his bad drinking habits. Mako and her husband decided to live with her in order to take care of her father-in-law. Her father-in-law was a kind person as long as he didn't drink. Mako and her husband hadn't seen each other recently, and even when Mako invited her husband to join her, he refused, saying he was tired. One day, Mako and her father-in-law were having a drink in the evening and were both drunk. Mako stood up and nearly fell, but her father-in-law supported her. Pretending to be concerned, Mako's father-in-law took off Mako's clothes and they ended up having sex in a drunken state. The next day, Mako regretted it and asked her father-in-law about it, but he didn't remember. "It was the first time I'd ever come that hard during sex..."