@Brian ****
ahhh, that's the problem, she's NOT on an extension based on employment from the immigration office (when you all would get matching extensions) she's on a year-long, multi-entry Non-B visa where she bounces (which means you can't get extensions based on being related to her).
I would say have her check with her employer and see why she can't get a yearly extension of stay instead of bouncing every 90 days. If she can't you all bounce.
Although as Johnny Wokhard correctly pointed out there is no fine for overstay with children under 15 and they cannot be banned for overstay until they're 18 (that doesn't mean they don't need a visa, BUT it means if they don't have one there is no repercussions for you the parents or the child) ..