When in Harvey's dream they see a giant floating banana which Freud doesn't comment on. Freuds theories were that everything in dreams links back to sexuality so the banana could be a tongue in cheek reference to the phallic shape.
Hilda and Zelda are threatened that if Sabrina doesn't solve the family secret that there will be consequences. However the secret is highly reliant on the clues given to Sabrina. Up to this point Sabrina has actually solved as much of the phrase as she can with the given clues.