I'm so sorry about everything you are going through with your sister. I hate that you're in the middle of it, but I'm thinking if you hadn't that she and the baby may not be here at all anymore.

As for good advice, I don't know. Just hang in there for her, because the aftermath is always the hardest. I would see about getting some therapy set as quickly as possible for her, and possibly for yourself as well...

I pray for you and your family.