In 1881 Zoe and Narcisse are living with a dau Josephine age 13 - b abt 1868 and son Arthur - so the Marie b. in 1873 is not with them. Only speculation - but maybe the first Marie died and they named another child Mary/Marie in 1882? The death cert of Mary Fortier lists her birth as St. Romaud which is where they were living in 1881 census. I am not that familiar with the areas of Quebec so I couldn't tell if this is a significantly different place than Château-Richer, Montmorency No 1 where the first Marie was christened but on a google map it seems they are only; about 60 miles apart - probably a fair distance in the 1870's. .
Not much help.
Canada Census, 1881 St-Romuald, Lévis, Quebec, Can
Citing this Record "Canada Census, 1881," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MVNN-16M
Narcisse Goulet M 33y Quebec
Zoe Goulet F 33y Quebec
Josephine Goulet F 13y Quebec
J. Arthur Goulet M 5y Quebec
Joseph Lessard M 10y Quebec
Leocade Gravel F 67y Quebec
Ontario Deaths,1869-1937
Citing this Record "Ontario Deaths,1869-1937 and Overseas Deaths, 1939-1947," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/J6KQ-H2L
Mary Fortier
Death 28 Nov 1921 Calvert, Temiskaming, Ontario
Female Age: 39
Birth Date: 15 Jul 1882 Birthplace: St. Romuald
Burial Date: 02 Dec 1921
Burial Place: Iroquois Falls
Father's Name: N. Goulette
Mother's Name: Z Gravel
Spouse's Name: H. Fortier
Reference ID: yr 1921 cn 32404
GS Film number: 1863545
Digital Folder Number: 4171537
Image Number: 366