If you are still around I think I have a clearer answer for you this time.
Jean Baptiste Leblanc m Josephte Duval
they had a son FX Leblanc m Sophie Jussaume of Marlboro
they had another son JB Leblanc m Alphonsine Ouimette also from Marlboro.
They both had children with similar names but I have a lot of it sorted out if you are still interested.
I realize looking back how confusing the rest of the data I gave you was, but I'm back working on it and maybe we can put notes together.
I am now living in Marlborough myself!