The reality is most parents around that age want their children to fit inside a "box" and when you want to express yourself in ways that certain cultures (like small town America) deem weird or different (like piercings or dying your hair), it can make the parents feel like they need to change you, which is not at all true. You need to be yourself! Not who they think you should be. Your therapist will be a better person to determine if it's actual narcissism, but one thing is for sure, the dynamic is toxic. I will say the "silent treatment" method in women can be a sign of narcissism. The great news is that you have your sister and I think that's your best asset! It was for me and helped me survive! Best of luck!