First of all: Welcome to PC.

Leah, I'm really sorry about what's happened. How is the rest of your family coping? I suggest seeing a T(herapist) together would help all of you..

Write a letter to her, make it as long as you want, say whatever, and see if she can get that letter. If not, let your family read it, I wouldn't be surprised if they felt the same way. Leave it on a table so they can see it, you don't have to give it to them directly..

Leah, you need the strength to move on. Your sister did what she did, but you still have the chance to blossom.. ((((((((((((Leah)))))))))))))))

Take care, and I'll say a prayer for you.