The news of this marriage shocked everyone. On 15 October 1423 it was announced that not only was Jacqueline married to one of the most powerful princes of Europe, but that she was also rumoured to be pregnant with his child. To secure her position, Jacqueline had to obtain the formal annulment of her marriage with John IV of Brabant. She asked Pope Martin V in Rome and Antipope Benedict XIII in Avignon to resolve her irregular marital status, but her uncle John III intervened against it. Unexpectedly, her cousin Philip the Good, who wanted to prevent an English invasion, supported the annulment.