Anonymous wrote:If there was little to not chance your wife or partner would ever find out and a guarantee the other person is clean.
DH here: no. But only because your question asks what might happen if there was only a “little” chance she would find out. Not only would it be wrong, it would not be worth that small risk. The rest of the question has no bearing on reality, the chance of her finding out would never be zero, and there can never be a guarantee that the other person is “clean”—these realities are part of the reason why cheating is immoral, people might feel very differently about this issue if such risks really could be zero. But we don’t live in that world.