Very bizarre. She's telling people she had a bad night, she apologizes, and she regrets it.
But shes's going to plead not guilty? Then why is she apologizing? And she's refusing to answer questions about how many drinks she had?
The failure to take personal responsibility here is shocking. If she simply owned up, said she'd made a huge mistake, would never do it again, apologize, and take what's coming to her, then that's one thing.
But this display of apology and then pleading not guilty is absolutely dreadful. It's for this complete lack of judgement that she should resign - much more so than the criminal act she is apologizing for.