I wouldn't rule that out, either, though it's impossible, at this point in time, to really know or even have the basis for forming an educated guess without having known the people.
True. We never really know what drives someone to do something like what Jane did. And when I read what Smedley (the OP) posted, it makes me furious that she turned on those poor young soldiers! They trusted her, and she stabbed them in the back, and she should be held accountable for her actions now. And as you said - there is no statute of limitations for treason.