I made an assumption I shouldn't have - I thought Aurore was a daughter-in-law to Jean Baptiste but she was his granddaughter. I found her marriage. She was Aurore Cote, daughter of Edouard Cote and Elodie Gagne.
She married Hermidas Gagne who was son of Theophile Gagne and Henriette Hebert.
I found son Edouard (listed as Howard in census)in baptisms. He was baptized in Roxton Falls 1869. Father Jean Baptiste Gane, mother Aurilie Gamache Sponsors Eusibe Gagne, uncle and Rose Gagne , aunt
I also found burial for Lucien in 1912 Roxton
Quebec, Vital and Church Records (Drouin Collection), 1621-1967 about Lucien Gagne Name: Lucien Gagne Event: Enterrement (Burial) Burial Year: 1912 Burial Location: Roxton Falls, Québec (Quebec) Place of Worship or Institution: St-Jean-Baptiste
It says: June 24, 1912 burial in the cemetery of this Parish the body of Lucien Gagne, spouse of Eveline Gagne of this Parish, died on the 21st, at the age of 53 years. Present at the burial Jean Baptiste Gagne, Louis Gagne and others.
*** there are several signatures at the end Arthur Gagne, Louis Gagne, Hubert Gagne, Gustave Gagne Baptiste Gagne, Albert Gagne, Lucien Gagne, Eveline Cote, Albina Gagner, Rosa Anna Gagner, Maria Gagner
I looked for a second marriage for Eveline but did not find one.