Abuse, culture, financially dependent on her husband, brainwashed...these are just a few of the possible reasons that I've heard.
None of these things will help make more sense of it in my eyes.
She didn't even call her husband when Madalina went missing! Why? Maybe because she's the one that harmed her. Maybe because she knew that he had Madalina and she was in on everything.
1 - If she didn't think he would harm the girl, wouldn't she call simply to ask if Madalina went with him?
2 - If she did think that he would harm the girl, wouldn't she call to beg him not to?
3 - If she believed that her husband put their family in danger and Madalina was kidnapped, wouldn't she call to let her husband know?
IMO, not making that first phone call to her husband speaks volumes as to her involvement.
Of course we don't know much at this point and imo it's hard to make sense of anyone killing a child for any reason, or covering up for it (if that's what happened here).
That said, statistically, the stepfather is far more often the culprit than the mother, as far as I know. And here we're also starting out with quite a power imbalance, on paper at least. The stepfather is much older, physically larger, the only breadwinner(?) and American, with the wife being from an impoverished country and probably isolated.
Also, I could easily see an abuse victim (if that's what she was) not speaking right away even though her husband had been locked up. For all she could have known at the time, he might have soon been released. And she could have reasonably feared for her own life, or that he'd kill her child (if he told her the child was only missing) or her family members in Moldova, whether on his own or through an accomplice. I mean, if he did kill her child, it's not farfetched to think he'd do everything he could to keep her quiet about it. There's also a deeply ingrained mind warp that can go along with domestic abuse, that might take some undoing. And her possibly not knowing how trustworthy the American authorities are, especially when they're rumored to not be trustworthy where she comes from.
There are also a couple of (slight, granted) indications that he was possibly abusive or at least controlling. Her father said he didn't like her to speak to her family, which is not a good sign imo. And she herself said that he put the family in danger and that she feared conflict with him. That sounded to me like her starting to point the finger at him, if it checks out as true.
All speculation, to be sure. But after all, something dire is going on here and the above imo is not a ridiculous theory.
It's also possible, though imo not nearly as statistically likely, that she is the main perpetrator and has her much older husband "wrapped around her little finger." Or that they acted equally.
So I guess we're kinda doing some amateur profiling here, which may or may not turn out to be correct.
IF she is a domestic abuse victim, she might talk with a little more time locked up away from him or more reassurance or whatever. Maybe one or both of them have told LE much more already. Personally, I don't see how these two could be any match for seasoned crime investigators for long.
ALL MOO