I have found in the Bouctouche church record that Jean Baptiste Léger and Suzanne Bastarache were married July 27, 1863 (M77, p.178, reg. 3). Jean-Baptiste parent's are not mentionned. Suzanne's father is Moise but her mother is not mentionned. The witnesses are Anselme Bastarache and Celeste leger. They've obtained a dispense for cause of consanguinity to the 4th degree. Meaning that they had the same great great grandparents.
I have found in the 1901 census, Suzanne Leger living with her brother Anselme Bastarche. It is reported that she is 80 years old.
I am suspecting that this mariage is a second mariage at least for Jean-Baptiste. If my suspicions are correct, Jean Baptiste would have been previoulsy married to Brigitte Olive Jaillet.
Can you give me more details about Suzanne's ancestors, this way I could verify the details of the dispensation.