How does Orual feel when the Fox calls Psyche "Prettier than Aphrodite?" Why does she feel this way?

The Fox, Grandfather, makes it seem as if she is jealous. Orual, however, seems to genuinely feel his words foreshadow something bad.

"Speak words of better omen, Grandfather,"I said, though I knew he would scold and mock me for saying it.For at his words, though on that summer day the rocks were too hot to touch, it was as if a soft, cold hand had been laid on myl eft side, and I shivered.
"Babai!" said the Fox. "It is your words that are ill omened. The divine nature is not like that. It has no envy."
But whatever he said, I knew it is not good to talk that way about Ungit.