Fox's Cunning.
She should have noticed faster that she was confused by all Asmodeus's unAsmodean instructions. No, that's not quite fair to herself, she noticed it was weird, and drew conclusions - specifically it's how she concluded Asmodeus cared more about their succeeding than their being Asmodean. Backtrace, now. You don't know the reason why. Asmodeus is giving unAsmodean instructions. It's not because He has changed his mind. It's -
"He and Abadar - or He and Irori - have a deal? Most High?"