If she doesn't volunteer or initiate talking about her feelings, then that leaves you in the position to ask her about it, right? That is pressure to her. Can you understand that? It is one thing for her to want to offer information, and another for you to pry it from her.
Obviously something triggered her anger. If it was that program, or whatever it was, where you were digging up the past.....then she may still be dealing with those emotions. Why on earth would want to press it more?
You may see it as some action to stop the D, but actually, you are pushing it through. For her, discussing her feelings is the same thing as discussing the relationship. She doesn't know how to disquisition between the two. One is connect to the other.
Why can't you just share a nice time together and let her steer the conversations?
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!