MEP,
Is she going to a sober living facility or transitional living facility after rehab?
What kind of recovery plan have you set in place for yourself/family for her return?
What kind of recovery plan does she have in place when she returns (IOP, aftercare, AA meetings, therapists, etc...)
Please remember that addiction is a long term recovery process. Just because one completes detox/rehab/etc does not mean they do not need to work on it anymore.. it is a rest of their life kind of thing.