if you feel you or your friends/relatives will fall for her ploys again, you have to ask yourself if the risk is even worth it. What will you gain? Do you believe you will change her by confronting her? If not what is it that you will gain by taking this risk and again weigh the risk with the supposed benefit.

When it comes to confronting her believing it will change what she does, in most cases, that's not really what happens. People need to change on their own and it's usually not by the words or confrontations of others that typically make us change permanently or in a substantial way. In any type of behavior one needs to hit a "rock bottom" where they realize and have to face what they've done wrong and have a eureka moment that tells them strongly that change is needed. Typically this idea is used in the form of talking bout drug and alcohol addiction but really it's foundational to any major behavioral changes.