Dear wanttobehealthy, as far as the playmates are concerned: "Don't do something; just stand there" (old saying for co-dependents).
It is POSSIBLE that the kids will gradually drift back into playing with each other. I think kids tend to do this if the adults can keep their hands off. Since you don't have control over those 2 adults---you don't know---but, it might even out, eventually, for the kids.
By the way (I don't know if the wife is an alcoholic also??)---she may be as controlled by her husbands alcoholism--and, probably very co-dependent on him.??
I'm just saying............
dandylion