Sometimes this whole DBing thing can feel like a game, like you need to make the perfect move at the correct time. I really think that the key is to understand that the journey is about you (I am still struggling with this).
Does it hurt YOU to respond to her contacts? Are YOU better off responding or not?
The DBing goal is to make yourself into a person that only a fool would leave. If responding to her contacts is hurting your pursuit to be a better person, then don't respond.