I have lived with an alcoholic and I have lived iwht someone in MLC.
IGNORING them just turns your home into a MESS, things go missing, get damaged, YOu can't keep a home stable for children with an addict living there for long...
You have to show them the door or get them in a program or you leave with the kids and find a healthir home that they arne't allow into anymore
Just detaching isn't going to help when you LIVE in teh same home wiht the addict... they will Make your LIFE HELL for as long as you live with them