[1] At age 30, Foretier married Denis-Benjamin Viger, a lawyer in Montreal and member of the Legislative Assembly of Lower Canada.
His work took him away from their home for long periods, attending Parliament in Quebec City, and also in delegations to London, representing the interests of Lower Canada.
She was an early member of the Association des dames bienveillantes de Saint-Jacques, which began in 1828, working particularly on the committee which provided educational assistance to poor girls.
In 1833, she was one of the group of women who successfully petitioned the Lower Canada Legislative Assembly for financial grants of up to £500 for the support of widows and orphans in Montreal.
Louis-Joseph Papineau, a major political leader and cousin of her husband, wrote: "How inclined she was to believe the best of a person and how ready to do good; how far removed she was from thinking evil possible, and how incapable of speaking ill of anyone at all.