The Constitution of 1982 is the fundamental law of the land everywhere in Canada, including Quebec, notwithstanding the regrettable fact that the then sovereigntist premier of Quebec, René Lévesque, refused to sign the final document. However, although not legally necessary, it is nevertheless desirable that the National Assembly of Quebec formally endorse the 1982 constitutional changes.
If Pauline Marois' government decides it wants to lead Quebec out of Canada, to my mind she's simply following the logical path that has been laid down (intentionally or not) by our Federal leaders over the past 145 years. If it turns out Quebec wants a divorce we should grant it and move on. It seems evident there wasn't much of a family to begin with, and we don't seem to want to start building one now.
The Liberal Party of Canada is the only party on the federal spectrum that can unequivocally embrace national unity, Quebec nationalism and social progressiveness at the same time. Referendum or no referendum, the LPC needs strong, committed federalists advancing a clear vision for a united Canada now if it wants to successfully embark on its rebuilding voyage.