I accidentally found a message from my wife's leader that you should have a rest during your period, and they will go on a business trip when you are finished. Are they having an affair?

I don't think you should think too much. Maybe he took your wife for his sister. But to be honest, the beholder sees clearly. I hope you don't get angry when you say this. I still think he and your wife are ambiguous, if not ambiguous. As you said, how can a man know a woman's physiological period unless the woman is very close to the man? I hope you can think about cheating a hundred times. Of course, this is my opinion.