Are you saying that she has no idea she is being hunted and pursued ? If that is the case, why not just do the normal thing and go home and sleep in your own bed? No, I think this woman knows she is being hunted. She may very well be walking around amongst people, I just don't think she looks like the pictures they have posted of her everywhere. If she is still dressed the same, and hasn't altered her appearance, then she almost certainly must have left the area where the search is being conducted.
I got to thinking something this morning. The night she stayed at the office building, there is a very good chance that she may have had internet access and/or had the ability to watch a T.V. set in one of the offices while she was staying there. She could have easily read the same news reports we were all reading through Tuesday morning. By the time she left the office building early the next morning, she would have known that she was wanted in the disappearances of her children. Show me any office building in America that doesn't have internet access and television sets scattered throughout.
Knowing this information...........the game was on. Change your appearance, get far, far away. Nobody has seen her since.