Hi Jay, welcome.
The safety and well being of your son is your guide post here.
When we live with alcoholism, particually alcoholism that includes violence we are always in danger.
It doesn't matter that she may realize what she needs to in the future, what matters is the present and it sounds like you aw is a monster. I'm very sorry if you find that offensive, but she is a danger, to herself , to you, and more importantly your son.
Leaving your son home alone with a binge drinker is very dangerous.
Are you invoved in Al anon or counseling. You need support.
I'm sure others will be along to lend support. Please keep posting, glad you found us.
Katie