Here's what I have on Julie Désilets and her parents:
Pierre Duval (Alexis Duval & Rosalie Daneau) m 16-08-1853 Drummondville (Drummond) Julie Désilets (Louis Désilets or Désilly & Marie Ayot)
Her parents: Louis Désilets or Désilly (François Désilly & Élisabeth Cardinal) m 29-05-1821 Sorel (Richelieu), St-Pierre Marie Ayot Note: - Marie Ayot was the widow of Antoine Desrochers. Children: Archange / Joseph Champagne, Sorel (Richelieu), St-Pierre, 05-04-1842 Julie / Pierre Duval, Drummondville (Drummond), 16-08-1853 Marie / Narcisse Tanguay, Sorel (Richelieu), St-Pierre, 13-11-1849
I'm not sure that these people were "real" Désilets. I have seen their surname spelled Désilly and Désilets, and you have seen it as Désilie. Also, though I have a large Désilets database on all the Désilets I have ever been able to find, I have not been able to link Louis Désilets or Désilly & Élisabeth Cardinal to the rest of the Désilets.
I think the surname Désilly ou Désilie needs to be looked into.