Hi Onipar- sorry for your current state. This is a great forum for support.
From what you have described, she has a drinking problem. From an outsiders point of view, here are the red flags:
1) She appears to drink mostly every night. 1/2 bottle of tequila is not like a glass of wine.
2) Her mood seems to be dictated by alcohol (if she doesn't get her drink on, she will just go to bed)
3) It is not "normal" to drink before work.
If you keep reading here, there are som common messages:
1) You did not cause it
2) You cannot control it
3) You cannot cure it
Unless something changes, things will get worse. Not only for her, but also for you.