I know the term 'narcissist' is over-used but I strongly believe my sibling has NPD. Without going into huge detail, she has weaponised her separation from her 'abusive' partner 15 years ago to extract large sums of money from our parents, she's never held down a job for more than a few weeks but has a mortgage, extension, expensive lifestyle with members' club membership etc that is largely funded by them, has triangulated the family so that everyone treads on eggshells around her and each other, and is impossible to challenge on anything as then you get told you're part of the 'abuse'. She has threatened suicide if she doesn't get her own way. She's got two kids, one of which is the classic Golden Child and one is the scapegoat. She's starting to make noises that the scapegoat is 'abusive' (he isn't - he just sees through her bullshit and she hates it) and she massively spoils and smothers the other child. He has no boundaries and my sibling treats him more like a boyfriend than a child. (Not saying there's anything untoward going on, it's just not a healthy model of parenting). She's also rinsing our parents of cash and I am worried that if my dad dies (he is very unwell) and leaves all the money to mum, as I expect he will, my mum won't be able to say no to my sister (she already can't) and that money will swiftly vanish, leaving mum struggling to pay for any care she might need. So I have twin worries about my nephews and my parents but I don't know what to do about any of it. Our other sibling is also aware and concerned about the potential for mum getting ripped off. It's impossible to reason with a narcissist as they so firmly believe their own version of events, and in her world, she 'has' to have that money and doesn't believe she is anything other than a perfect parent. She and I have a fractious relationship - well, I just avoid her as much as I humanly can, and live as far away as possible. It's not me I am worried about here though. Advice please!