Well, just as you know how long it took for you to FINALLY become 'sick and tired of being sick and tired' it will take whatever it takes for her.
Give her a 'list' of Alanon meetings, and just like with your AS when she is ready she will go.
Anytime she starts on a dissertation on the 'latest' a simple response is:
"what are you going to do about this/these acts or actions and how they affect you?"
I have had to ask this question many many times of those who have come to me about their particular A.
It is her choice to allow him to continue to stay in her home, with or without boundaries.
I cannot tell them what to do, can only share what I do in a similar situation.
J M H O
Love and hugs,