You keep reminding her that you are her child after all. Tell her that you are updated version of her!
Be careful if you do, the narcissist can be a monster to anyone who hurts their pride.
A malignant narcissist cannot magically shed his damaging patterns of behavior to bestow unconditional love upon his child. A good parent is one who places his child's needs above his own. A narcissist always places their needs first.
Yes!
yes they can, in my experience the child's narcissism is a result of being raised by a narcissist ,
It's not best to tell him after a while so be straight and tell him
Yes. Otherwise they'll get deeper and deeper into it. At lease they have a fighting chance if you tell them.
If he or she dates people of the same sex.
Yes, but only if he got something out of it.
Probably. I think I know her.
You can't EVER ensure a narcissist is "gone". But usually they are only out to get whatever benefits them. If he is showing interest in you and/or the child, that will disappear once he finds his next target.
Unfortunately, I would say it is more common for a child to work hard to try to please the narcissistic parent, sacrificing their own dreams, development and dignity in the process. The most likely reason I can see that a narcissist would disown a child would be that the child has decided to take a stand for him/herself. If a child insists on being an independent person who will not pander to the childish needs of the narcissist, then the narcissist will fight to win them back or disown them. In this case, the narcissist will always be looking for the opportunity for the child to come crawling back and give the parent the idolization the parent "deserves." Of course, there can be many other situations, other factors, and other outcomes. You have to objectively view the factors in your situation before coming to any real conclusions. Best of luck!