This is probably totally off-the-wall, but what if "someone" got fed up with Maya allegedly having "boyfriend(s)" and wanting a divorce, so he locked her away somewhere so he could have complete control over her? Maybe "someone" smuggled her out alive in the freezer, with holes shot into it for ventilation, and that freezer was conveniently replaced with another one. Maybe she's being held in some remote cabin somewhere. Food and other necessities could have been stockpiled in advance, or "someone" could be bringing supplies in as needed. I would hope that "someone" and "someone's relatives" are under constant surveillance, but there could also be a third party involved that we don't (yet) know about. "Someone" could even be threatening to harm the children if she doesn't cooperate or if she tries to escape.
Realistically, I don't think it's true, but it could be possible ... maybe. Just trying to think outside the box.
I wonder how long it takes to get the results of the most recent search of the house.