While I don't agree with most of these posts, I will say because of her reputation she should get a pass. This is where YMMV comes into play. But, you are not wrong for posting a NCNS. Hobbyist need to know which ladies play games and don't have any TCB skills.
As Moxie said, sometimes a mental break is needed and emergencies do happen, but it doesn't take much to send a quick text that says, I had an emergency. Just like in the real world, a text would have been sent to a regular friend explaining there was an emergency when breaking a date.
However, if she was really sick with the flue or something similar, then she would not have had the energy or the wherewithal to remember to send a text explaining she was sick.
Just my 2 cents.