Hi. I'm not related to this family. Unfortunately, the 1809 parish record for St-Paul is missing from the Quebec, Vital and Church Records (Drouin Collection), 1621-1967.However, a baptism for son Charles lists godparents that might help locate his parents' family:
Charles Forest, b. 23 Jan, bap 23 Jan 1813 Joliette (St-Paul), son of Joseph Forest & Marie Laperche dite Saint-Jean. -godparents- Charles Laperche dit Saint-Jean & Therese Martinau.
Here is a marriage for the godparents:
Charles Laperche dit Saint-Jean (Pierre Laperche dit Saint-Jean & Angelique Larame) m. 7 Nov 1814 Joliette (St-Paul) Therese Martineau (Charles Martineau & Angelique Trochambaud)
Charles may have been the brother of Marie.Hope this helps.Annie