My gf started at 11:30 am

My stepdaughter (11) was home all day, we were working on chores, doing really well. 11:30 am we heard the crack of a can opening. By 2pm she (my gf) was slurring her words, stumbling a bit and overreacting to every little thing. We have been walking on eggshells trying to keep her from getting angry at nothing. But ever 20 minutes she gets attention starved and starts making a scene to get our attention.

She complains about gaining weight but when I suggest laying off the beer for a while she snaps back that the beer isn't the issue. But...there is a reason they call it a "beer belly".....

There are so many more issues and I don't have all night to type...

Edit for clarification: Daughter is hers, not mine, but I'd kill for her - she's wonderful. The dad is still around, solid co-parent, but neither side of the family is in a particularly good financial position (maintaining a cold 12'er in the fridge at all times isn't helping). I could leave, but I don't have anywhere to go - my family in 900 miles away and I have a good job, but shit credit so getting my own place would probably be a fucking nightmare.

"Why are you still there?" - I love her, it wasn't like this at the start. Those aforementioned financial issues have had an impact on our overall happiness, and that's when the drinking started. She comes from a difficult childhood and her lasting trauma is wreaking havoc on her psyche, and of course, the alcohol only exacerbates things.

I need to reach out to her family and try to get something organized....