Hard to say about her. Nothing could change for years or she could start taking ADs and turn completely dysfunctional in three months like my ex did. Or anywhere in between.
I remember making myself pretty scarce when I was in the stage you're in.
You say you're done raising children but they still live at home it sounds like? How old are your kids? The reason I ask is because my Father was an alcoholic but not until I was well into my teens. Don't underestimate the effect this is having on your kids. You're emotionally impacted and could probably acknowledge several symptoms of depression, so isn't it safe to assume they could be too?