Welcome, koi,
Lots of good feedback, here. Let me put it to you this way: IF she ever decides to commit to sobriety, the stuff you've been doing (not drinking around her, being encouraging and supportive) will help. It's highly doubtful, though, that any of that will get her to the point of committing. That has to be internal.
And, if she's truly alcoholic, she won't ever stay, reliably, at 98 percent or any other percent. She will be 100 percent or she will still be an active alcoholic.