Sober for a few days is not RECOVERY. This takes months and months of work and change through working a program, having a sponsor, etc.
You don't need to backslide and unsettle yourself or your kids.
way down the road when and if he is recovered maybe then you could begin to rebuild a relationship. I'd tell him to go get his life in order. Don't let him Play you. Stay strong
in having the life you want.