I cannot add much more to what the other wise people have told you already.
I highly recommend you find an al-anon meeting in your area and go to it. It willl be a godsend for you.
NO one deserves to have abuse heaped on them, nor do those kids deserve to have to hear you take it.
If you keep waiting for that "sweet sober person" to take over permanently, you might have a LONG wait. I mean, a very long wait, maybe til she kills herself with the drinking. Are you prepared for that?
Wishing ain't gonna make something so. I tried wishing w/my xabf and ended up wasting 3 yrs of my life.