Hello.
For context i was raised only by my father, after my mom left home. Eventually my dad started a new relationship when i was 13. My stepmom had a previuos child as well, a girl 3y older.
Now i am 21 and she is 24, and i think she might be a covert narcissist person (i've made some research), and i don't know how to cope with it.
She dumped college, and now dumped a relationship as well, and everytime the blame is on others never on her.
She blames me for her flaws, cause i was a trouble kid (been thru some shit and did therapy for a while), and she said se didn't get the attention she needed as teen. I don't believe its true. She blames the world when there is not enough sunny days or not enough rain…its exhausting.
She can be very toxic sometimes, and everytime we engage in some argument she just starts crying, and i just stop. She is always the victim.
And now, she is trying and influencing my father and stepmother's lives. She's trying to influence all their choices, from what they should and can eat, what they should wear, how they should think, and this is creating discomfort.
We are not that closed at all, but i care somehow about her anyway, after all we grew up together. I fear she might get a depression. And it is not like i can dump her.
How can i help in this situation? I am getting angry on her sometimes.
TL;DR – i think my half sister is a covert narcissist and i am having a hard time dealing with it.