Ok then.....we have established that she loves her Dad. (A relationship that you have tried very hard to preserve by the way)
Jill,
A lot of what their relationship is based on is what he has spoon fed her. Ok so they are lies, but he has to live with that. You know the truth. There may come a time in the not so distant future when she will want to talk this out with you. How will you handle that? I agree with everyone here. Right now she is processing and probably worrying about her Dad based on what he's told her. You have always been the "strong one" in her eyes because that's how you wanted it to be. She doesn't know what this did to you. She's probably always felt that she had to take up for her Dad to some degree, but I also remember some not so nice memories she has thanks to him. When she starts to deal with everything that has gone on there will be somethings that you couldn't protect her from, and she'll have to consider the whole package.
Don't worry you are her Mother and she loves you. I think you're doing the only thing you can. Give her space and when she wants to talk, be prepared to bare all. Something tells me she will want some pretty tough answers.