It's illegal to even access someones account without their permission.
This happened to me about a year ago, and you have no idea how ridiculously crippling it was.
I had just left for uni, so all my confirmation stuff was in emails, everything I had to reply to was via email aswell. It made my life extremely difficult for a month.
Just stick her in the ignore list.
:edit: I'm going to close this now as I feel you have your answer.