"Freudian slip" could also apply.

Sigmund Freud argued that personality is formed through conflicts among three fundamental structures of the human mind: the id, ego, and superego. He thought that one's true suppressed [sexual] feelings can show themselves, slip out in error, when one is under stress and unable to maintain the facade constructed to hide ones true feelings or beliefs. The woman, when confronted by the police officer was unable to maintain the falsehood that she was not, in fact, soliciting and, because she knew that she was, she verbalised the thought unconsciously - as Freud suggests, hence a Freudian Slip.