Amee, that is SUCH good news! That first step is always the hardest. I do want to caution you, though, that she may relapse. It's normal for that to happen. I pray that she won't, but there is what is called the "honeymoon" or "pink cloud" phase. So if she relapses, don't get too upset...and just tell her to start again tomorrow. It's truly "one day at a time." It took me 6 mos. to stop relapsing...usually every weekend...before I finally honestly waved the white flag of surrender. Fortunately, I've never relapsed since then, but some of us have a hard time latching onto sobriety.
Here is a hint that AA gives all newcomers: HALT. It's an acronym for hungry, angry, lonely, and tired. She mustn't allow herself to become any of those, as they lead to relapse.
Keep us posted!
I realize that she is not going to AA right now. I was just imparting a little of my wisdom derived from AA. Actually, I think that phase HALT is a good one for anyone...especially caregivers, now that I think about it. We often just keep on going and doing and giving and don't realize how it can affect us. So all of us can benefit from a bit of HALT in our lives.
Your MIL is lucky to have you!