Bless you for watching over those grandbabies! They are very lucky to have a stable and loving "mother-figure" to guide them and protect them!
Document Document Document!!
You AD is acting like a quacking pine tree! Nothing she is saying is believable, no counselor would ever suggest that she "isn't an addict" and "doesnt need treatment"! I wouldn't worry too much about what she is saying...
Keep close contact with the CPS worker... Demand that she be given drug tests, if you are concerned that since she is an LPN she would "know" what does or doesn't show up on a screening, demand a hair follicle test be done.
Stay strong...YOU are those girls' only hope!