Um, my wife and I use the same code for all our devices - if your partner is developing this level of paranoia aren't there easier approaches to this question?

Um, my wife and I use the same code for all our devices - if your partner is developing this level of paranoia aren't there easier approaches to this question? Or maybe setup a separate whatsapp account to use for cheating if you are big into that so folks can't track you while you cheat?