And seriously, what grown adult uses What's App unless they're trying to hide something? I'd be wondering what he was using it for in the past.
I don't know how you go about finding the OW. Many would say don't bother as the pain may provoke you into counter-productive actions. But I think knowledge is power if you can handle it. And I'd sure want to know about the woman that he is likely going to have around your kids.
Is his business one where someone could sit outside and observe him going to lunch with OW or such?
