AC, I agree with WHG. Get busy with something. You can't just wait around, waiting for her to call. If you are free when she calls, go ahead and pick her up at your convenience. If you are not free, just tell you will be able to pick her up.
It's disrespectful to you on her part not to let you know. I also agree with WHG, don't make punitive, just do it at your convenience.
