I sent a PM to her Monday evening, asking if she happened to be available Tuesday around 11:00 AM. She replied quickly that she could meet at her incall at noon. I responded that noon was perfect, and she sent one more reply around 10:30 PM saying "See you then".
Tuesday came, and since I hadn't heard from her by 11:00 AM, I sent another PM asking for address, and followed up with a text asking the same. She never replied to the text or PM, and has not even read the PM as of now.
I waited 24 hours before posting this NCNS to allow her to contact me with an explanation, apology, or offer to reschedule. None have materialized.
I understand that things happen, and that ladies sometimes change their minds when they get a better offer or a request from a regular, but I would expect some type of communication to that effect, rather than complete silence.
Oh well, I guess Common Courtesy really isn't very common, after all.