I have this relative that seems very high in narcissistic and histrionic traits. She'd constantly talk about how uniquely amazing she thinks she is and at the same time victimised by the whole world, because no one recognises her superiority enough (surprise, surprise).
I fell out of her good graces after I refused a few favours she asked me. I also couldn't resist to jokingly call her out a few times or laugh off some of her rants. However, it's probably not the most sensible way to act with such people as they can be quite vindictive. It also shook me when I once saw how disturbingly different she acts in public vs. private and I don't want to have anything to do with her. However, it's unavoidable for me to meet her a few times a year. How best to neutrally handle her without losing my ground, validating her and giving her supply?