I also wanted to add that narcissists do tend to target loving, caring, patient, giving-types of people. They know that this sort of person will forgive them (for a certain amount of time, anyway---especially if they are family), and that they will provide them with regular narcissistic supply (the satisfaction they get from hurting you, and de-valuing or perhaps even humiliating you). This is one big reason you and your sister are so very different. You probably tolerated her nonsense longer than anyone else has. She sees you completely differently to the way you have, until now, seen her.

I genuinely wish I could sit with you and look into your eyes and tell you it will somehow be alright. If you are the caring, forgiving individual you seem to be, there's every chance you will be able to heal from the things she's done over time. It means you possess that inner strength to be able to move on, once you can get your head around her historical patterns. And I do wish you a faster recovery time than I experienced.

But do not get caught up in hoping she will change, or that you can open her eyes to her problem. Narcissists can respond to being revealed with swift and terrible punishment. Prepare yourself to simply walk away from her.