Hi,
I am sorry about all of this. Here is what I think:
Unfortunately, addicts lie, and lie somemore. Their addiction and behavior is always much worse than they ever acknowledge.
Detox is only a baby step, the real work comes in the recovery portion. The meetings, the 12 steps, the desire to stay clean at all costs. The addict who is in recovery must be as selfish about their recovery as they were about their using. This will be a lifelong battle, there is no cure for addiction, relapses are common.
With that said, you are doing the right thing, your child must be your priorty, her safety and welfare come first.
I cannot tell you what to do, however, I wouldn't consider give her a second chance until she is clean for at least a year, and is working a strong recovery program. If her actions warrent a second chance, you will know it. The reason I say that is because of your daughter, she should not be living in this toxic enviorment.
Keep posting, keep reading others posts, and if you can get to some meetings, it will help.