I wonder if this was some sort of effort to trap her into saying something that could be used to DF her.
Maybe. it wouldn't surprise me, since we are intensively trained to put God and the Organization above everything. This kind of situation gives militants the "opportunity to show how loyal they are".
But in most cases this is what happens, almost in every case: Natural human curiosity, that need to know everything, drives JW's to ask, to inquire, to find out... It's only human. The gossipy environment in the congregation fuels that trend; add to that the empty lives most JW's live, and Bang! you have an extremely inquisitive person.
Then the 'training' kicks in: You know something about someone, something big. You have to tell. Other bros and sis, the elders, whatever. They turn it into a matter of "my conscience was bothering me for keeping the secret. Knowing of something and not telling is being an accomplice..." and all that crap.
The end result is the same: Yes, she was fishing, and yes, she would turn in any piece of information she gets.