None of that really matters, though, because if she really did think there was a problem, then the appropriate thing to do would have been to TALK
TO HER about it. Not to run around makig bogus calls to CPS, wastig their time and creating drama. Most of the people who post here about CPS absoutely agonize about it, and have already tried to help numerous times in numerous ways, before taking that route, because they know the damage that can be done from even a closed case.
She SHOULD be cutting people out of her life who are threatening to come between her and her kids. If this was a friend who was going around badmouthing her to her other friends, people would tell her to choose her children over this person who clearly has no respect for her as a parent. This is really no different. If she doesn't get the result she wants fropm this call, then she will continue to call and make more trouble. It's not a misuderstanding, and it won't stop....Fool me once, shame on you, but I'll be damned if you fool ME twice.