I can't give you concrete information on your Marie-Josephte (Josephine not being a F/C spelling of the day so you're either looking for Josephe or more likely Josephte), but I can give you a very likely path that they followed. I tracked my Bouthillette line from Canada to Southbridge. The only records from that era are parish records. You'll find the Catholic parishes in and near Southbridge kept great records, including the names of both parents when someone was born, married or died. Once you get those, you can go to the Loiselle Marriage Index (which also has many Southbridge records in it) and try to find the parents.
Most of the French-Canadians who settled in that area came down from Trois Rivieres in the 1830s and worked for a period of time in the St. Albans VT lumber fields. There aren't many records from the lumbering area that are helpful. I've even found that most babies born there were taken back into Canada to be baptized (as much as 3 years old when it happened).
Also found out the reason they all left. In the 1830s there was a terrible economic depression that hit Quebec. The only place for them to go for jobs was across the river into the U.S. Seems the British didn't like the French-Canadians and were putting pressure on them to leave or give up their culture. Those who made it to St. Alban's did well for a while, but it was very hard work. From the research I've found (there's some excellent work out of the University of Vermont that you may enjoy reading), most who left St. Albans either went to Massachusetts/Rhode Island or were hired away to work the new lumber fields in Michigan and Wisconsin between 1845-1855.
Hope it helps to at least give you some context and a little direction.