Pilate on the judgment seat is reasoning power in a person, the part that weighs outer facts and passes sentence on what it sees. His wife is the deeper feeling nature, closer to the source, and her warning is the intuition that the reasoning mind is about to condemn something it should not touch. The just man is the imaginal act, the new conception a person is forming, which is innocent of the case being built against it.
Her dream is where the deeper knowing arrives, because a person is worked upon most from within, not from the surface. She suffers a warning. What she pays is the cost of letting reason overrule imagination. A person creates his world by what he imagines and forfeits it the moment he trusts the evidence of the senses instead.