What is really really sad is that she does this at night. She is clearly drinking and doing this.
Very disturbing to watch someone that you do love do this. BUT you know she is toxic and until she loses the co-dependant alcoholic boyfriend and stops drinking and pill popping this won't change. I can't be part of it.
This is very sad indeed. But like
HappyChappy said you can only do what you can and nothing more. Maybe your sister will change someday but that's up to her. In spite of everything, it is clear that you do still love her and that only makes it harder seeing her do this to herself.
Is there any hope? IDK How she ended up like this IDK. I guess I could see the patterns of mental illness early on. I had an old family friend call me and ask what was up with her. She sees her facebook posts. Her comment to me was "when your mom was alive she always said she was violent".
This question is probably something many of us on here ask themselves. No matter how many years have passed or how much has happened, in the back of your head you might still entertain some hope of things getting better some day. Who knows, perhaps it will, but based on what you've been through so far, I think you're absolutely right for not wanting to be a part of this and keeping your distance. Especially since your kids are involved. First facebook and now LinkedIn, what's next? Not pleasant at all that you're having to deal with this right now but perhaps you can look at it as a test to see how far you've come. Particularly at these times we really need to apply all the new skills we've learned to stay calm and defend our boundaries.