Who is the real culprit in the story "A Question of Trust"?

Answer – The lady is the thief who obtains the jewels by deceiving Horace, although Horace also enters the house intending to steal. She caught Horace when he was doing robbery and behaved like owner of the house. She warns him to send into prison but then she refused and opened the safe from Horace Danby and took the Jewelry. Horace Danby caught for the theft because fingerprints on the safe are found of Horace.