Thanks for your answer.
Yeah, I guess its not my fault, but in this mother-son dynamic,.. you know, I liked to be loved and seen as 'better child' than my sister, but I really haven't clue what it means and if it was wrong.
I feel her anger that I 'got more than she did' and feel that she needs to see someone paying for that, but since my parents are 'unmistakable' and what ever they do wrong they only say: "...well, ...we haven't thought that way...", my sister needs to make me pay for that. (simply my parents don't accept that energy of their wrongdoing, so that energy stays in the one that is hurting).
I feel she needs compassion for that and acknowledgement.
Thanks CANDC