With youngest's dad. He fell off the wagon and can't speak without slurring. Can't comprehend that our son just broke his arm.

Instead he talked about getting beat up and is scared for his life homeless. Can he stay here for 1 week while he takes meds and sobers up?
Nope.
We've been done for 9 years. I've raised kids on my own.
This is really hard for me saying no - so hard that I'm posting about it.
But my plate is full. I can't fix or take care of him. In the past, I e tried to help and it always goes bad. Why such anxiety when I know it's what I have to do? Saying no...