I'm just some guy on the internet, but I signed in to TSL for the first time in almost two years to post this.

You said that you don't see any way that your family could take her back. That's not the same as saying that you won't take her back. So, big question time...

Would you take her back if there was a realistic hope that the outcome would be different than the last time? If the answer is yes, you need to do everything in your power to see if she really has changed.

Keep the lines of communication open as long as she wants. Your family, at the very least, left a positive impression on her, and the last thing she needs right now is to feel discarded by people she seems to think well of. What you learn from this may be enough to help you determine if she's worth another chance, but keep President Reagan's words (and the even older Russian proverb he borrowed them from) in mind; trust, but verify.

Try to confirm if your belief that her parents are out of the picture (permanently or otherwise) is accurate. She may have been acting out before in the hopes that you would give up on her and send her back home. Her behavior might be vastly improved if she truly understands that is not an option now.

Talk to the staff at her rehab facility. They know what she was like when they took her in and can tell you if she's really changed since February. Some of the staff members may be jaded, but you can probably dig deep enough and talk to enough people to get a realistic assessment of her. Also see if the staff will let you talk to any outsiders she has had regular contact with (teachers, doctors, etc.) to get their opinions of her.

Talk about everything that you learn with your family and anyone else that you trust to give sound advice. Pray often about her and the entire situation if praying is something that you regularly do.

You might do all of this and decide that bringing her back into your home really is a bad idea. That's okay; sometimes things just don't work out. But you and your family obviously care about her, so you owe it to yourselves to make sure that you do the right thing, no matter what that might turn out to be.