Hard but simple. He either learns to grow up and work HIS problem after rehab, and you care for you and your children, or he stays as is and you decide if you can take any more of this.
As has been said, YOU being there or not doesn't mean anything more than provider of HIS comforts. It has NO bearing on him sober or drunk, that's his decision.
Let him deal with his own business, and if he poops again, let him change his own nappy.
