She ran a non profit in Longeueil which is now run by her daughters. Followed in the tradition of her mother Antoinette Robidoux.https://openparliament.ca/debates/2016/3/22/pierre-nantel-1/only/Also for clarity, under civil law in Quebec, women keep their maiden names even tho' they may be referred to using their married names.Antoinette's maiden name was Caron, married to Marcel Robidoux. From Find-a-Grave:https://www.findagrave.com/memorial/214383380/antoinette-robidoux?_gl=1*q9zmdj*_gcl_au*MTQ4Mzk2MjQ3OS4xNjg4ODE5MjE0*_ga*MTg3MjYwNTY0My4xNjc1MzAxNDE0*_ga_QPQNV9XG1B*YTNkZTBkNjYtNjc5MS00NWNiLTk2ZTQtZWEzNjY5MGY5OWEwLjE1LjEuMTY5Mzg0MDIwNC4wLjAuMA..*_ga_4QT8FMEX30*YTNkZTBkNjYtNjc5MS00NWNiLTk2ZTQtZWEzNjY5MGY5OWEwLjMyNC4xLjE2OTM4NDAyMDQuMTMuMC4wMarried in 1933, Marie Catherine Antoinette Caron to Jean Marcel Ernest Robidoux. He was the son of Armand Robidoux and Aline Laroche. She was the daughter of Joseph Caron and Cecile Caron. https://www.ancestry.ca/discoveryui-content/view/14103352:1091The parish records only go to 1941 online.
The match could also be through the second cousin's paternal line -- Montpetit. Where did OP find the marriage?