It's pretty normal for people in a workplace to exchange numbers and text and no, that doesn't violate any laws if people choose voluntarily to communicate via text. My wife sees my texts on my personal phone sometimes. No need to go onto why as it doesn't matter. The big difference is that my wife is not so insecure to jump to conclusions if I get a weird text. In fact, my wife would probably joke about it. So that's the real issue... The guy has a cripplingly insecure wife. Also, I'm sorry if you've never had a good relationship with your boss. It's almost always the boss' fault, but it should be normal to be able to talk to your boss easily like a good acquaintance.