Major question, when did she turn? That could be a major point.
ever seen the actors dramatically reading the text messages?
it seems like shortly after meeting with mueller she grows distant then she starts to get exposed in the media and a little later tells him to never text him again.
IMO, I think that would be about the time she turned, LOL smiley face...
https://www.youtube.com/watch?v=3xyPFfozPDE
the relevant part starts at about 31 minutes