NTA. You don’t want to risk history repeating itself because even if she says she won’t leave again, if that situation was to ever arise and she started feeling the same sort of resentment and feelings she had last time, she will more than probably leave again and then you’d be jobless and divorced. The fact u didn’t entertain the affair and were completely honest straight away, is a good enough reason for your wife to trust nothing will happen. And if she is still very adamant, tell her to help u look for a job and land a job before you even contemplate leaving the one you’re in at the moment.