Bbj, just as Sara said, some people need to learn the hard way. Some even, never do. If you feel you've done all you can, let him be. Really this time. Dont use any of the practical issues to manipulate him, create guilt or intimidate him. Dont point out to him what your D would mean to the kids. He is a grown up man, he saw last time how your S reacted. He knows, he chooses to NOT see it.
I dont think he is "depressed" in the sense that his depression makes him react this way.I think it is the other way around. I think he is fed up with his inability to cope with the sitch for whatever reasons and he feels inadequate and therefore his macho self feels bad. And I am not convinced there is another woman, at least not yet. One will be easy to find if he continues to look for easy fixes... Love K
And yes, you would be fed(good food) and you would have a room here.