nmd.....have you ever really put your cards out on the table. Told her how her alcoholism is affecting you....using "I" statements?
You haven't said..but, if you have insurance, have you two discussed inpatient rehab for her?
And/or considered a detox stay or going to a doctor who will prescribe meds for an at home detox?
sometimes, there is a fear of the withdrawl symptoms....which is a real and legitimate fear....(as Maudcat has pointed out).....
You already know that there are no gurantees....but, you can "lose her to the disease" whether she is in the home or outside of it.....
I don't think there is anything to lose by taking action....