If I unfriended my ex on Facebook. What will her reaction be?

I decided to unfriend my ex girlfriend what do you think her reaction will be? She hurt me a lot when we were couple and now we broke up supposedly stayed "friends." More than a year later she still contacts me from time to time. Usually in those encounters she is still demeaning and some times demanding as if she still expects me to do things for her. (like consoling her when she has problems with her new boyfriend. -yes, that really happened.-)

Given the circumstances, what do you suppose will be her reaction if she finds out I un-friend her without giving her previous notice or any hint?
If I unfriended my ex on Facebook. What will her reaction be?
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