I did find the marriage of Wilfrid & Marie in a book called "Moyen Nord Ontarien" published in 1984 by Hubert Houle.
In it, it is stated that the wedding took place on July 17, 1910 in St-Charles. Marie's parents are Euclide Rivet & Ozine Forest from Eganville. Wilfrid's parents are Sevère Bédard & Exilda Séguin from Plantagenet.
I also found 3 brothers of Marie who were married in St-Charles. They are :
Almanza Rivet who married Alice Braconnier on Jan 23, 1922. It is written that Almanza is from St-Ligouri.
Alphonse Rivet who married Fedora Chaloux on July 18, 1921.
Ephrem Rivet who married Louise Dupuis on Oct 11, 1920. It is written that Ephrem is from Joliette.