Closely associated with the Quebec sovereigntist movement, she led the Saint-Jean-Baptiste Society in Montreal from 1986 to 1989 and oversaw the group Partenaires pour la souveraineté (Partners of Sovereignty) in the 1990s.
In December 1986, she organized a rally at the Paul Sauvé Arena in support of retaining and strengthening Quebec's language laws.
[11] Bourassa instead overturned the court's decision by invoking Section Thirty-three of the Canadian Charter of Rights and Freedoms (i.e., the "Notwithstanding Clause").
[12] She condemned an arson attack against the headquarters of Alliance Quebec in January 1989 and took part in a radio discussion with its leader, Peter Blaikie, not long thereafter.
[13] In March 1989, as Boudreau's term as president came to an end, the society narrowly voted to continue its ongoing dialogue with the anglophone organization.
[18] During the mid-1990s, Boudreau was a prominent spokesperson for Partenaires pour la souveraineté (Partners of Sovereignty), an umbrella organization of several high-profile unions and nationalist groups.
She was quoted as saying, "We constantly hear that (Bill 101) is abnormal, illegal, illegitimate, and all that has sapped the confidence of Quebecers in the legal tool they have given themselves.