hmmm, I don't think it would hurt to call her. But do what ever makes you feel comfortable. Its not necessary to call her as you said because you already have made contact with the correct people and gotten an interview. But it can provide you with some further information and answers to questions that have popped into your mind since your interview. Its never a bad thing to stay in someone's mind while a decision is being made, as long as your not obnoxious about it.
And by obnoxious I mean calling every day and asking if a decision has been made, not following up with someone else in the company to get a better feel for the company. Yup, people do that, and I have never hired a one.