Hi and Welcome!..
As she is now "maintance drinking"..
Yes...she does need a medically supervised de tox
that does not necessarily mean a rehab.
There are short term meds to ease de toxing.
The Salvation Army has an excellent free program,
if the doctor recommends it.
We also have a sticky at the top here
"Quitting..what to expect" with our personal
experiences.
Take care...