Okay, so your Sister has mental problems.
For which, Only a Therapist or meds can help.
But first, SHE has to see, that she has a problem.
She Obviously has, Personality Disorders.
She uses you, as her Door-Mat.
Again, she will not see that. Unless she realizes it.
She is Toxic.
I, have a Sibling that was like that. Just like that.
All her life.
It was only when my Dad died... that she began to be more human. She got Therapy help. She really became a different person. Still cannot fully 'Trust" her, but she improved.
You cannot change her.
But you need to protect yourself. Maybe see a Therapist too.
Anger in you, about it, is harmful.
It is unbearable.
This is a Toxic dynamic.
Of which, you either be a part of or not.
Toxic people, ALSO make others "sick" too.
So, know that.
Your Sister is mentally ill.
It is not normal.
But she now, after all this time of mistreating you, is making you.... mentally harmed.
Do NOT let that happen.
It is hard... to crawl out of a hole like that... when others make you, a door-mat and mentally unhappy.
Toxic people like that, MAKE others at 'fault.' Even if it is not, their fault.
That is the dynamic... of mentally ill people and Abusers. Which your Sister is.
Get your bearings and center yourself.
KNOW what is right and wrong.
You CANNOT expect all of them to "apologize" to you.
Even if they did, it will NOT change anything. It will not change them. It will not change you.
So get past, having to hear an apology.
You can only, make yourself better and get past it.
Get away, from Toxic people.
Do not let... a mentally sick person, make you sick too.
Or it will be a dynamic, that you cannot escape... and you will always then, be only reacting to that person. Thereby, they are controlling, you.
You cannot rationalize with people like that.
Don't expect, 'normal' behavior from them.
They are not, normal.
all the best,