My wife's friend suddenly wants unprotected sex. (Wakana Reika ALDN-550)

I am Lif, 54 years old. My wife, Lixiang, is 43. We have no children. We both divorced and remarried five years ago. My wife has a son from her previous marriage. That son is now an adult and married. So, she and her son are like distant relatives, seeing each other only once every few years. Both my wife and I remarried at an advanced age, but we unexpectedly have a good sex life at night, about once a week. However, I've always disliked children, and in case we don't want children, I always use a condom during sex at night. Recently, my wife has been getting along very well with a couple she met at a women's association. To us, they are a young couple, about the same age as our child, but for some reason, we get along very well. I secretly looked forward to meeting that couple… Then, on that day, I witnessed my wife's shocked expression…