Interesting articles and discussion here. My younger sister has some traits in common with the introverted narcissist personality type. From a young age she was convinced that I was the favored child. I never felt this way and neither did my parents by their own account. My mother always put it down to me being quiet and agreeable, (in private conversations) while my sister was a bull in a china shop and caused a lot more chaos in the family. She was in trouble more for this reason and so looked at me as the goody two shoes.
It pained my mother that my sister felt inferior. As a consequence she was often reluctant to hold her accountable for unacceptable behavior for fear of causing psychological harm. I would not say that my sister was spoiled; however the consequences did not often match the crimes. She would often lash out physically toward me - a black eye, head beaten against the car window on the way to school, getting shaken, twisted wrists, pushes and punches leaving bruises. My mother's response was most often 'you know what she is like - what do you want me to do?' And my sister was allowed to go on her merry way with not even an apology. In her eyes, I deserved it for merely existing. I'm sure this taught her on some level that it was ok to abuse and hurt others if they angered her, whether intentional or not.
Today we are in our 40s, and no more physical abuse, thank goodness. I know she loves me dearly as I do her. But she still has that undying compulsion to throw me under the bus. Basically, reading between the lines, everyone knows that she is more intelligent than I, and bless her heart, it is her job to educate me. If contradicted on something, she is still quick to jump, with anger, indignation, and put downs. If only she could be 'normal', the girl would probably be my best friend. But in true narcissistic fashion she doesn't think she needs therapy. If everyone would just stop getting on her nerves there wouldn't be a problem.
In a nutshell, it sucks!