That depends on what superstition she has. If it were Buddhism, it would be much easier. You can tell her something, because many Buddhist classics are superstitious. For example, there is a cloud in the Diamond Sutra: If you see me with color. Beg me with my voice. It is heresy. Can't see the Buddha. So many behaviors are superstitious. But if it is another superstition, it depends on the specific behavior, but it has a purpose. First of all, don't talk about things from the standpoint of opposing her, but analyze specific things. Secondly, the method of persuasion can't be completed overnight, so we should pay attention to keeping things quiet.