Just married, baby due in 2 weeks...my alcoholic mother is killing me

Hi there all! Looking for any and all advice. For the past 2 years or so, I have been trying to support my alcoholic mother in her recovery, and her battle against depression. She had hit a clear rock bottom about 9 months ago- constantly mixing alcohol and any medication including my dogs tranquilizers, missing most of the big events of the last year, several "suicide" attempts ( I put them in quotes because they were more like temper tantrums than actual attempts to take her own life). I have tried to accommodate her in all sorts of ways- I found her a great therapist, I have attended AA with her, i even moved my wedding so she would be able to attend while in a good place having just come out of 2 months in a rehab facility. She is constantly in and out of rehab and clinics, and it always goes the same. She seems to do really well for a few weeks and then starts to nose dive and is unable to come back from it and lands in another clinic.

I am having a baby in 2 weeks and have been steadily trying to place healthy boundaries with her in terms of things I expect if she wants to be a part of the baby's life. Months ago I expressed that she she needed to improve, not be perfect, but improve her situation. And within the last few months,albeit some bumps, had Improved in generall. She seemed to be having better days than not. However, throughout all of this and something we have discussed many times, she hides and sneaks alcohol, becomes defensive when you point it out and outright makes random excuses to go buy it. Due to where I stand emotionally with her and my enabling and very pushy father, I wrote an email explaining that for the safety of the baby, she would essentially need my father to supervise visits with the baby and invited them to meet and discuss this with me at my therapist' meeting a few days later. ( the reasons being that we can't always figure out when she's been drinking and has panic attacks at the drop of a hat- I will have a newborn, I can't babysit her any more). Well this well intentioned email resulted in me being blamed for my moms most recent visit to the psych ward and suicide attempt. My father did attend this meeting and mostly scolded me for sending an email and saying that I was simply wrong and my therapist was wrong about everything. I expressed at this meeting that with a few weeks before a my new baby arriving that I needed a break from my mom and her insanity...to which my father "understood". Within the last week since expressing my need to focus on me and the baby, I have been told by my father that I needed to respond to my moms texts and calls quickly and positively so she doesn't think she has done wrong and then told that I was to attend a family meeting at her newest group.

Bottom line is this- I asked for a break and am still being bombarded by the insanity. I have a baby coming in 2 weeks that I have had no time to focus on because everything has been about my mother. I want to see her do well and want her in mine and my family's life but as a healthy influence, hence the boundaries. Do I go to this meeting, knowing it will end up like every other one that we have had in the last year? A few weeks of good and then a nose dive because she is never getting better for her? Or do I politely decline, stick to my guns and just express that I need time away from all this?

Help? I am trying so hard to focus on my new family ( which is just being worn down by this chaos) while still taking into consideration my historical family.