Assuming that your sister is over 18 years old, nobody can make her go to or stay at a rehab facility. That being said, if she wants to try rehab, I would highly recommend “A Forever Recovery” in Battlecreek Michigan. I know they take insurance, but not sure which ones. You could call to find out. This program gives the patient some assistance through withdrawal and offers 3 or so different tracts for recovery. They can explain it better. She could choose which method she likes best though. I know this isn’t in southern Ohio like you requested, but it might just be worth the drive.
I wish you the best!