My thoughts:
First, she worried if she reported the kids missing, they had previous CPS involvement and had not had the kids back for long. I can see hesitation that if she is unsure anything is wrong, I do not need to make a big deal of this or I may regret doing so (her thoughts), maybe he just has the kids at his mom's or maybe the car broke down, etc. I am not saying that is right, just that it may have been what she was thinking.
Second, as stated, maybe she never filed one.
Third, I agree, just listing the bf missing may not be taken very seriously as you stated, my bf is not answering calls--she perhaps tried to keep the kids out of it, again because of CPS concerns.
However, one thing that occurs to me here is since she did not have her car, did her mother drive her to do this report and sit in the car, or did she let BB take her car alone to do so. Do we know the answer to that?
That thought brings me to where did BB go when out and about by herself, did she also go looking for them, him, etc. if she was alone, go by her apartment herself, and did she even go to LE at all to file a report as some think she likely did not. I picture as probably many of us do BB with her mother the entire time after getting home and being picked up at the airport but was she?
I am trying to give her some benefit of the doubt. I truly do not think she was involved in what led to Maleah missing and likely murdered in these days when it is more than likely confirmed she was out of state but I am not closing out what she may have known, done, or what, if any, involvement she may have had in prior incidents. He I have convicted as he himself places himself with Maleah when she goes "missing" per his "story". He is caught in his lie with the very car he said was missing seen dropping him off at the hospital, etc., on video at the apartment leaving without Maleah, etc. He is missing for what, 24 hours??
Is there any LE agency that does not have video? If she was actually there, I would think they would know that regardless of who she reported missing or whether she filled out a full report. They know whether it is true or not regardless of whether we do I would think.
I think in this case that cell phones and surveillance cameras are going to play a larger than normal part than in some. They will look for the bleach purchase on debit or credit cards and more, garbage bags, maybe even a gas can. They are then going to look at surveillance on say a Walmart video and see what time, how he was dressed, etc. And gas station video. Were any of the children with and, if not, where were they, etc. I think there is already as we know plenty of video proving his lies and if she is lying, there will be with her as well.
I would also doubt that the one video cam footage we have seen is necessarily the only video camera footage in that apartment complex and we all now we have not seen all of it most likely.
I know people wonder about the time of her flight and various things, so do I. I, however, am sure LE does not wonder and they know. We just do not.
Just talking out loud and jumping off of your post, apologize for the length.
I also think the 5 year old brother could be a wealth of information, sadly.
All jmo.