Oh, no doubt Mia is not completely innocent. I mean, Ronan was born when she was with Woody and it's pretty darned clear that Woody is not his father. If you look at his picture side-by-side with Frank Sinatra, it's obvious who the father is. Ronan looks more like Frank Sinatra and Frank Sinatra Jr. ever has, right down to those blue eyes.
Still, I believe that something happened to Dylan. Like I said upthread, some of the things she recounted in her open letter were not the kind of things that an adult would manufacture and coach a child to say. They were just too odd.