The duke's death was proved by legal documents, among which was this letter written by Alexander, and the tribunal accordingly recognized Gandia's son as his legal heir.[52] Dona Maria also claimed her husband's personal property in his house in Rome, which was valued at thirty thousand ducats, and which on the death of Don Giovanni, had been transferred by Alexander VI, to the fratricide Caesar to administer for his nephew, as appears from an official document of the Roman notary Beneimbene, dated December 19, 1498.
At this time Lucretia was not in her palace in the Vatican.

June 4th she had gone to the convent of S.Sisto on the Appian Way, thereby causing a great sensation in Rome.

Her flight doubtless was in some way connected with the forced annulment of her marriage.

While her father himself may not have banished her to S.Sisto, she, probably excited by Pesaro's departure, and perhaps angry with the Pope, had doubtless sought this place as an asylum.

That she was angry with him is shown by a letter written by Donato Aretino from Rome, June 19th, to Cardinal Ippolito d'Este: "Madonna Lucretia has left the palace _insalutato hospite_ and gone to a convent known as that of S.Sisto; where she now is.