Greetings, I combed the parish registries of Ste-Genevieve-de-Berthier and St-Cuthbert, Qc and I found the following information.Marie-Magdeleine last name has been enumerated differently with each enumeration sometimes her last name is Bonno, Petit, Bruno, Bruneau, and Petit-Bruno.
Marie-Magdeleine Petit Bruno, daughter of Jean-Baptiste Petit-Bruno and Madeleine Potier, born around 1730 and died on May 9, 1809 St-Cuthbert, Qc she married Joseph Desrosiers dit Lafreniere sometimes list under the name of Laferriere, son for Francois Desrosiers dit Lafreniere and Angelique Piette, born around 1730 and died on May 10, 1809 St-Cuthbert, Qc one day after his wife.This couple married on January 8, 1751 Ste-Genevieve-de-Berthier, Qc.
This couple lived in Ste-Genevieve-de-Berthier before moving to St-Cuthbert after 1772 because it was here they had at least 8 children.
(1) Joseph Desrosiers dit Lafresniere born around 1752 and died on September 4, 1764 Ste-Genevieve-de-Berthier, Qc.
(2) Anonymous Lafreniere child born and died on June 9, 1753 Ste-Genevieve-de-Berthier, Qc.
(3) Marie-Magdeleine Desrosiers born on May 20, 1754 and died on December 12, 1755 Ste-Genevieve-de-Berthier, Qc.
(4) Marie-Magdeleine Desrosiers born on December 9, 1756 and died on May 12, 1773 Ste-Genevieve-de-Berthier, Qc.
(5) Antoine Desrosiers dit Lafresniere born on November 17, 1763 Ste-Genevieve-de-Berthier, Qc.
(6) Marie-Genevieve Lafreniere born on November 30, 1765 Ste-Genevieve-de-Berthier, Qc.
(7) Joseph Desrosiers dit Lafreniere born around 1766 and died on March 20, 1770 Ste-Genevieve-de-Berthier, Qc.
(8)Genevieve Desrosiers born on July 21, 1772 Ste-Genevieve-de-Berthier, Qc and died on November 6, 1843 St-Cuthbert, Qc married on October 18, 1790 St-Cuthbert, Qc to Joseph Brule born around 1764 and died on October 6, 1834 St-Cuthbert, Qc.
This couple may have had other children but I have not been able to find them at this time.
I hope this is what you are searching.