Marie's attempt to participate in state affairs during the events of 1726 resulted in a crisis in her relationship with Louis XV, and she sought advice on how to behave from the Princess of Carignano, whom unbeknownst to her was a spy in service of Savoy. The princess' advice was that as Queen of France, it was Marie's duty was not to involve herself in political intrigues and plots, but to act as an example of virtue and piety and a role model of a "Catholic consort of the Most Christian King". Queen Marie accepted the advice and followed it for the rest of her life, as she was never again involved in any political activity. After the 1726 crisis and until the birth of a dauphin in 1729, Cardinal Fleury and the Princess of Carignano made long running preparations to replace Marie, preferably with Charlotte of Hesse-Rheinfels-Rotenburg, if she should die in childbirth.