Zoravec had no clue about whatever he had done to Devi, because to him he had never treated her like that. He was unsure what the demoness had been saying, but he had to listen to her if Zoravec intended to use her further for his own gain. It left him stunned, no doubt that he had unintentionally treated both women differently.
Devi's words made him realise that he had been discriminating between both women. And there was no solid reason behind it because Devi and Kate were not a match for each other. Thus, the discrimination was silly and unnecessary, and maybe that was why the demoness spoke about it.
She was unable to swallow the fact that Zoravec had treated them unfairly solely because Kate allowed him to taste her pussy. The demoness was not sure if she wanted to give Zoravec the way he desired or not. Because after witnessing the discrimination she did not have any intention to let him taste her like he did with Kate.