I'm so sorry to hear of the injustices she has put on you. I think you have no power over her and her manipulations, lies, and abuse. However, your H is the one you have a right to work this out with.
I know it's been an ongoing issue between the two of us. I just want you to feel like H respects you and sees sis for who she is and him not doing that seems to pour salt on the wounds.
But if somehow you can get more compassion from him - some how get him to hear the pain she has caused you over the years and ask him to be your man and stand by you ... I think this is what you need.
Do I know how to do this? No! lol Do you have any ideas, LR?