I've started my lady's family tree and we've come to a dead end.
Her great grand-father was Philippe Provencher (1876-1959) married to Cecilia Robert on May 7 1911. There's a saying in the family that he got adopted by the "Ducharme" family in St-Albert-de-Warwick, Quebec. Philippe was the first to be baptised in the St-Albert church but under the name Ducharme.
In the "Provencher" dictionary, Philippe his mentioned as the last child but is 16 years older then the first child of Luc Ducharme, which leads us to believe he was adopted, but from whom ?
I have attached the dictionary's reference to help you understand.
Merci d'y jeter un coup d'oeil.