Do I reunite my parents?

I care for my mother and it has been a process over the past two years to...

(1) take her away from the family home where she was suicidal and semi-demented

(2) then have her live with me while I worked to

(3) evict the abusive relative from the family home

(4) and got my parents to agree they will sell the family home so the situation cannot repeat itself.

My parents have money so they are not strained for resources.

The issue is that dad is coming to visit to make a rest of their lives plan with my mom next week.

My father's idea of caregiving is screaming at my mom for drinking while she hungrily downs a triple whiskey and pops some pills.

My mother was suicidal when I took her in. She doesn't like psychologists because they wean her off drugs and she LIKES drugs. So if there is not a 24/7 family presence there is no one she will reach out to during a crisis.

But she will not accept a home care nurse or caregiver. She is extremely abusive to those offering services and they typically end up getting resentful and cheat her out of cash before quitting. (And not crazy old lady out of it abusive. She will ruin you on Yelp & Google Reviews and the threaten you and demand free services or the next step is court. Which she cannot pull off but is scary.)

When we discuss my mother visiting my dad, my mother has real bad panics attacks the kind where you are not sure if she is having a massive heart attack or not. She talks constantly about going back to their town and building a new small house with him but she can't psychologically get on a plane.

My dad is no boy scout. They have a 37 year marriage of mutual hate and abuse. But it is also all they emotionally know and as they decline they want to concurrently eviscerate each other and also avoid major change and cling like koala bears.

The abusive relative, now no longer living with either, took things to an unbelieveable level. My parents will be better together than for the past decade as there will be no drug/gang/gun violence via the opioid epidemic.

My mom is more coherent and drinking less under my care than in years. Her weight is healthy, compared to previous anorexia, and she has stopped getting weird illnesses due to malnutrition and huge amounts of drugs and alcohol, which was 18 whiskeys a day plus valium when I took her in. (Her brother suicided by drinking himself to death via liver failure a few years ago and I think my mom was copying him.)

I know that the stable state here is due to me. My dad will provide a much lower standard of care. But I am tired of the abuse toward me. If I reunite them then I don't have to spend the next two years dragging my mother kicking and screaming into the world of health care aids and fights about a living trust, I can pass the buck.

My mother has no friends or caring relatives. Reuniting my parents is my only option to do marry, be full time employed, etc., as my mother is a disruptive and unpredictable presence. When I am away for several days for work she will regress in terms of drugs and alcohol and do things like miss the toilet when going number 2 or forget to give her dog water for 30 hours. I anticipate my father will enable her substance use and she will die sooner.

Each bout of worsening substance abuse takes longer for her to come back out of and she is losing function each time. She knows how to use phone apps to get items delivered so unless she has no financial access at all she WILL get whisky. If my dad doesn't enable her drug use she will re-engage the abusive relative and enter into deals with the devil. So she has made it such that she is hell bent on self destruction.

Only once was she clear headed about her decline. When I was chatting with a friend on the phone my mom wanted to interrupt me and get the other person to hang up (this is a hobby for her) so she was trying to come up with a related annecdote that someone would indulge and be like "awww, so sweet! Go talk to your mom!" My mother cried because she had no memory of my high school graduation and didn't know where all the time had gone. I didn't have the heart to tell her she wasn't there when I walked across the stage and she has never actually had the role of parent.

So now you know the outline of the situation.

I feel like my options are reunite my parents or get stuck with mother. As a carer I've done pretty well but I need to be working full time and can't do this anymore.

Is it wrong to pass her off onto my dad? I will need to use emotional pressure and guilt to do so which are the only things dad will respond to. He is a very all or nothing person and cannot make plans to share responsibility or tasks, either he does it all or someone else does. I've tried on that front. He has one relative and like my mom, no friends who will help. (He is also super abusive and mean to people.)

Is there a third option?