I'm sorry Lil and Jabber and all. It is SO hard to deal with a difficult child, even when both parents are on the same page, even for a minute. Usually one is here and the other there at any given moment.
It's not you two, it's the situation. It's not you two. It's not. Don't let the situation wreck you two.
Lil, you will do what you will do until you don't anymore and that is the natural order of things. We can only do what we can live with.
I know, I am a Mom too. It is so very hard to love an addict and someone with a mental illness, and literally stand down and watch their lives go down the tubes.
This thread was about setting those physical boundaries. It takes time to do that, and over time, as you feel better and better after setting them, it will come more naturally. It's the holiday season. It's cold outside. He is/was/said he was sick. All of that gets right to a mother's heart.
I have been burned over and over by difficult child and allowing him to invade my peace, my serenity and my space. Again I would do it, trying, because I love him.
We can only do what we can live with, and it's different for each one of us. This is so very hard, and we all need all of the support we can get. No wrong doing here, just people trying hard to figure out what to do.
Warm hugs.