Did Selina know the secret identity of Bruce?
Because when she saw that Batman was back on the news she was like: "well what do you know?"
The novelization confirms that she had no idea until it was too late (emphasis mine):
The infamous mercenary approached him.
"Let's not stand on ceremony here, Mr. Wayne."
Batman wasn't surprised that Bane knew his true identity. The man was connected to the League of Shadows, after all - he likely had heard of Bruce Wayne’s tangled history with Rā's al Ghūl.
Catwoman, on the other hand, was visibly taken aback by the revelation. A look of regret came over her face, as though she was having second thoughts about betraying him.
The Dark Knight Rises: The Official Novelization Chapter 20