Wow, so much in this thread! Rae, I am sorry you're going through this, and on the heels of a traumatic time already. It's natural for emotions to be high.
Gaylene and IK made some points that really resonated with me. I come at this from a very different perspective, as the baby of the family, and yes, apparently the favored child. My parents never "gave" me anything (I paid for my own college education, my first car, etc.) but my sister has always felt I was the favorite. This was mainly because I lived under the shadow of all the friction in the home between my sister and our parents as she went through her very rebellious teen years, and I learned to keep my head down and never make waves. I was the "easy" child who never caused trouble. This led to a whole other set of issues that I had to learn to confront in therapy, but that's another story.
But I really have to echo IK's words. We cannot change our parents (or anyone else). I had an amazing shift for the better in my relationship with my mother after I truly embraced this idea and decided to love and accept my mother the way she was, which meant listening to her with compassion and not trying to change her. I certainly wasn't perfect in this regard -- I was impatient and short with her just a mere day before she went into the hospital before she passed away -- but the effort was so rewarding, I can't even begin to explain it.
As soon as I dropped my expectations of her, it seemed that her expectations of me eased up as well. It had been as though she was trying to pull me closer as I was trying to push her away, and all of a sudden when I stopped pushing, she stopped pulling.
Ah, I'm rambling. I have no idea if any of this is helpful to you, but I wish you the best! There is a lot going on for you right now, and you don't need more drama. Big hugs!