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I'm Toshio. I'm 54 years old. My wife, Chisato, is 49 years old. We have no children. We remarried five years ago, both divorced. My wife has one son from her previous marriage. That son is already grown up and married. So I feel like I'm a distant relative, and I see my wife's son once every few years. That's the kind of relationship we had. My wife and I remarried at an advanced age, but we got along surprisingly well at night, about once a week. However, I've always been uncomfortable around children, so I always used a condom during sex just in case we didn't have a child. Recently, my wife and her friend, who she met at a women's group, were on good terms with each other and their families. From our perspective, they were a young couple about the same age as our children, but we got along really well, and I was secretly looking forward to meeting them... Then, one day, I witnessed my wife's shocking appearance...