You should be very proud of yourself. You did exactly the right thing. It's so scary to see in person what addiction turns the people you love into. They become strangers. As we all know, he has to be the one who decides enough is enough and until that happens the only thing you can do for your own well being (and your grandchilds) is being steadfast in your refusal to allow him to come home. It's the hardest thing you will ever have to do in your life, but also the most important.