Addiction is a taker, taker of healthy behavior, morals and character. Once it's taken a person it takes their loved ones too. It grasps ahold of our fear keeping us stuck and in enabling so it can continue to thrive. It over shadows our love with resentment and anger. It takes from our children their well being and safe environment. It takes there emotions today and tomorrow. And as you are witnessing even their Christmas money.
History doesn't repeat itself people repeat history. 7 years have gone by and he's still the same person doing the same things so how much longer are you willing to stick around waiting for this "change" to happen?
In your post you said when he was leaving he told you to call your mother to watch the Kids tomorrow. Does he watch the kids while you are at work???