quick review of the phrase 'mutual non-interference' in a marriage agreement: elegant on paper, slow self-harm in practice. you cannot ask why she came home late. you cannot ask whether she missed you. you cannot ask whether she remembers the thing she said when you were children. so you ask, 'are you coming home tonight?' and then, because you are apparently very mature, you add, 'no pressure if you're busy.' very dignified. very normal. extremely not humiliating.