The Cat?

I believe Marquez intentionally made the answer to the question unclear, 'is Eva in the cat?' I personally believe that Eva does not physically get into the cat, and this is why she eternally fiends for an orange. Eva vividly remembers the orange being above 'the boy.' This boy represents a sexual desire from Eva that she is unable to obtain. This is why the selection of an orange is significant, an orange takes additional order in order to eat and enjoy. Overall, the story is intentionally ambiguous, which adds to the mystery of the story and the overall enjoyability of the read.