Her son's marriage would produce some eight children four of whom would have further issue. Marie Jeanne Baptiste acted as godmother to her eldest grandchild Princess Maria Adelaide. She also maintained a good friendship with her daughter-in-law Anne Marie. Maria Adelaide and her sister Maria Luisa would have a close relationship with their grandmother, and both would make weekly visits to the Palazzo Madama. Her relationship with Maria Adelaide in particular is documented in letters the two sent to each other after 1696 when the young princess married Louis of France. Maria Luisa married Louis' brother Philip V of Spain by proxy on 11 Sep 1701. Sadly Maria Adelaide would die in 1712 at Versailles of Measles. These two prestigious marriages were designed by Louis XIV to entice Savoyard support during the War of the Spanish Succession. During this war, Marie Jeanne Baptiste was obliged to sell her jewels in order to maintain her household during the Battle of Turin of 1706. She and her grandchildren were obliged to flee to the safety of Genoa during the conflict.