We can look at each theory and find that they all are possible, but some just do not seem probable. Specifically, the theory that she has chosen to go AWOL, just doesn't seem likely. You could argue that she wouldn't communicate with her mom so her mom wouldn't have to face any problems with investigators, as LavenderLotus suggested. That would be likely if she actually did go AWOL intentionally, but I can't help but think this is such an unlikely scenario based on a couple of factors.
One is that it just wouldn't make sense for her to go AWOL because she was 1 month away from getting out anyway and she was, very much, looking forward to getting back home.
The second thought I have against it is, I'm sure most people here have read her responses to whatever has been written about her on the home wrecker site, that cheating spouse site or whatever it is and even the site that has her mugshots on them. She has made several loud, proud and long winded posts on every one of them. I mean like 4 or 5 separate posts each. Much of each of them are just ranting as if she is not being heard, but needs to get things off her chest.
So, do you really think she could go a few days, let alone an a entire month without defending her self and position? It just doesn't seem likely, especially after seeing her posts where her mugshots are. I mean, all comments are from her.
I'm not badmouthing or judging her, because I can't say that I wouldn't do the same thing, but I am saying that I doubt she could keep quiet this long. She seems more of the "In your face" type.