I think you absolutely should reply back to her! Especially if you got into any other schools, you should definitely let her know of your current status. In case you did not get into any schools yet, informing her of your interests in attending the school will also help. It is not really necessary to ask her for a phone interview, unless you have specific set of questions (even if you do, it will not affect much of their decisions as you will be their 'back-up' candidate, they will have interviews with their first-choice candidates first).
I am not a current graduate student, but I am in the same situation as you for one school, and my faculty advisor at my undergrad institution gave me aforementioned advices..