Fiya... man... I'm sorry to hear about your grieving. I don't think I have to tell you that you absolutely did the right thing... if I do... then here it is...
YOU completely and totally did the right thing.
Only she can get herself out of the mess she is in... and she has to want it badly. Some never climb back out. I sure hope she sees that smoking crack is a dead-end in all ways. But... you can't do it for her nor can you stop her from doing anything.
As Bikewench said... "Don't let your love for her cloud your mind..." cuz if she thinks she can get money from you for her habit chances are she will try every manipulative trick in the book to get it. Addiction is that ugly. It makes normally kind, sweet, and good people do things that are downright degrading in order to get their fix.
Hang in there.
Suga