isn't it byronic

Ouais, ouais, everyone has an agenda. But she is not going to say who she worked for—and even if she did, it would not mean she could not be lying, or she could not work for someone else now, or she could not have been a double agent the whole time. So you have to use your beautiful, clever head and look at what information you do have, about how she behaves and what she has and has not done here, the same as with everyone else.