Then it’s a journey you are both on. There is no victory, only constant vigilance. Stop being in the position where ‘only one’ is even an option.
I say this having seen my sister go through this too- fortunately more successfully than my dad.
Good luck man, find help. If not for her, then for you- it’s won’t be easy going alone.
My dad chose the booze in this scenario. From tenured university professor with a family to dying alone, homeless, on the other side of the country.
It may work, it may not. You are not (hopefully) the only one who wants to help her. Find the help, don’t take on the burden alone.
Don’t make a threat you are not ready to follow up on. If you go back on your word, then she can too.
Hey, some places it’s the county Sheriff that’s the coroner… which is also bad.
Sometimes people die in the county jail… and almost every time it’s not needed to perform an autopsy- it’s just natural causes…
The coroner needs to be an impartial medical professional.