I completely agree that the series went rapidly downhill when Anita went from Madonna (completely chaste) to "whore" (sleeping with anything that moves), mostly since she just can't seem to GET OVER IT and accept the situation.
However, the last couple of books have been a slight improvement, which is good as I'm apparently incapable of just GETTING OVER IT as well. :p

On that note, I'm going to be suicidal and ask for a letter. :s