That's awful. If she was concerned she should have spoken to you first, end of story. And the fact that you were not offered an apology by her or by anyone else... that would bug me no end.
I'd probably be looking elsewhere too... but I think it's great that you can be the better person by going back there.. if you can put it all behind you, good for you.
How does everyone else there feel about it? Will that particular woman be back or is she gone?