I am so sorry you are having to deal with this.
Perhaps this forum will be able to offer more suggestions.
Friends and Family of Substance Abusers - SoberRecovery : Alcoholism Drug Addiction Help and Information That part of this forum has many more people who are dealing with kids than this one. It's a quirk, because I am sure that many drug abusers have spouses and drinkers have parents, but that's how it seems to have panned out.
Hope it all works out for you both.