Has you parent always treated you differently? Are you a Scapegoat?

Please understand I am not here to promote anyone's website. This is been a life ring for me. I have found out at 55 years old the my mother is a Narcissistic Sociopath Parent NSP (mother), NSM ( and my siblings two of them are her "Golden Children".(GC) My mother because of the dementia hasn't been as slick as she was my entire life with the lying, and creating problems between us siblings. My sister and I are the caregivers, while her Golden Children do nothing. I just found out that the HGC , one in Texas as the right to sign for medical, sorry forgot what it is called. So I can't but she can. Unbelievable.
Anyway I have discovered since caring for my mother and the research, that so many of us "Baby Boomers: that are now caring for our parents have been the victims of a NSP. I have lived my entire life with no one believing anything I said. It has caused divorces in my life, family members and anyone she spoke to were told horrible things about me. She continues to do this telling my siblings and literally anyone she speaks to no one does anything for her.
As I am seeing so much of here, we are doing the work and other siblings come in laying the law. I CANNOT BE MORE SERIOUS,
Research it you will be so amazed, it is so interesting how much better I feel, Now I know it isn't me for one thing, that they are most definitely the sick ones. But for instance last night, we went and got gas, and she kept talking to me, so I walked over to the passenger side of the car. When I got in the car I cannot count how many times she told me I was stupid for not just talking to her on the drivers side. This is how she has spoken to me my entire life, never positive anything, Yesterday for the first time I had the confidence to tell her NO MOM I AM NOT STUPID, THE GAS HOSE WAS IN THE WAY, I said it twice, and when she repeated again, I TOLD IT DOES NOT MAKE ME STUPID BECAUSE I DO THINGS DIFFERENTLY THAN SHE WOULD, IT JUST MAKES me ME.................... I am here to tell all of you first, seriously, that felt damn good. So not that this is a question, and I am surely not promoting the book that this author sells, as I haven't read it yet, but this is a great place to start, there are You Tube Video's on the subject, I just have found that we can discuss some of these things and our experiences with this, and know that we are not alone. We can have our lives back . ONce you read this you will know if you have sufferred was torture.
I am so happy to have this site and you people, thank you
Kelly