My Aunt stalks me on Facebook? What can I do?

[Sara]

So I have a Facebook account, as you can tell by the title. And I have added my family and friends on there.
I am on FB quite frequently and often update my status saying what I am doing or where I am going and since I love taking pictures I post my photos on there too.
Well on every single one of those status, my Aunt likes them and comments on every single one of my photos my Aunt comments and likes them. I recently updated my status saying I was going to be spending an afternoon with my mom ( who is her sister) and she commented saying " I wanna go!" ( she did this when i said I said 'Having ice cream' and she " Mmmm where's mine?")
Not to mention that she always posts on my wall asking " Hey Sara is your mom workin tonite?" and calls our home phone a lot ( I know sounds o-t-t but I'm serious.)
I do understand that she is just trying to stay in contact with me, but I think it's crossing the line. How can I address the problem without offending her?
Thanks.