I'm a bit overwhelmed, Katelyn.
I've just read your posts and the answers in this Thread fairly carefully - it's all a bit much at once - I hope that's not too selfish on my behalf because you're the one here who is looking for (and receiving sincere) support.
(Funnily enough, I avoided reading your OP before now because I mistakenly took the title to mean you cribbing about how hurtful "sisters" (i.e. other forum members) can be in their comments here - silly me)
Perhaps Karren is right and keeping out of harm's way is the best way... perhaps not...
One very important aspect strikes me though.
Despite all the ridicule and inuendo your sister has thrown at you, I get the feeling you love her very much and really care for her.
Does she know that?
Wishing you (both) all the best,
Gaby