Me too, I have been asked if I had these two people.Also, with the parents (which I have in my file they were married 1 JUL 1839 - these are Jean-Baptiste BIGRAS dit Fauvel and Marie-Delphine POULIN).
The daughter is Catherine and the 1st husband was Octave Rochon and the second husband a Theophile SAURIOL.
All I've found so far is this from an 1881 census at FamilySearch:
Octave ROCHAN50 in 1881 would put his birth in 1831 Catherine ROCHAN 38 in 1881 would put her birth in 1843
1st child John was 6 in 1881, so birth would have been 1875.
2nd child Armas was 4 in 1881, so birth would have been 1877.
3rd child Clocinthe (F) was 2 in 1881, so birth would have been 1879.
4th child Arthur was just born so 1881.
So, following the etiquette of the times, Catherine would have approximately married at at least 18 so that would put the marriage to 1861, they appear to have had this Census in 1881, in Ontario.
So, my dear, your guess is as good as mine, they seem to be nowhere else to be found, althought that is not quite correct as a Cyr-Rochon file at World Connect list the marriage of Joseph-Octave ROCHON and Catherine FAUVEL with the birthdate of Joseph-Octave as being 1831, which would be impossible for Catherine to be related to her parents Jean-Baptiste and Delphine which I have a solid marriage date of 1 JUL 1839.
I sincerely hope this help, and if not please accept my sincere apologies for having wasted your time.