With or without a program, her sobriety will depend on how much she wants it. As said before, many get clean without any formal program or support system in place, and some who have all that still manage to fall back into active addiction. As much as we want it for our kids, we can't make it happen, only they can and they have to follow their own journey.
Like Hangin', I found that when I found my own program of recovery and began to work it, my life became better, no matter how my son did in his.
It's not fun watching those we love struggle, but we don't have to pull up a seat and watch it from the front row. It helps me to just give my son to God and leave the rest up to them.
Sending big hugs and lots of prayers for both of you.
Hugs