Seems like a smart time to become a pioneer now that the ministry is virtually at a standstill. She'll get to have all the Kudos without having to really do anything and it won't be her fault if she doesn't get her time in.
I wouldn't take it too seriously or "draw any lines in the sand" over this. If it were me, I'd play along with it realizing that she'll soon tire of making phone calls and writing letters. You could even have her practice on you as if she were presenting the "Truth" to you for the first time.
My wife had relatively no problem with being a JW but she left soon after I did. Without judgement or arguing, I used to tell her that I had sort of forgotten what the reasoning was behind certain doctrines and in explaining them to me, she realized how feeble the JW reasoning was.
I never argued, or pushed her into a corner but instead followed up with further questions, hoping that she'd be able to refresh my memory. In the process, she began to look past the JW mantra and to ask her own questions instead of waiting to being told what to believe.
Me: I've forgotten what scriptures we used to show the reason that Jesus had to die for all mankind.
Her: John xxx says that he had to lay down his life to buy back the life that Adam and Eve lost for mankind when Satan convinced Eve to eat of the forbidden fruit.
Me: Ok...yeah I remember that part but I can't remember what the actual scriptures we used to support the belief that Satan, who had been alive since the beginning of time and was the one who directly rebelled against Jehovah, would remain alive all these thousands of year but Adam and Eve and the rest of the yet unborn human race had to be punished immediately and would continue suffering and dying by the billions?
I'd go along with or agree with whatever explanation she provided, but in the process she got to entertain alternative thoughts that she'd have normally rejected if I had I stated them outright or had been confrontational.