In 2022, she ran as a Coalition Avenir Québec candidate in Sherbrooke for the provincial election, and lost to incumbent MNA Christine Labrie.

In the 38th Parliament she served as the Vice Chair of the House Transport Committee.

The MP told a news conference in Longueuil she was looking forward to spending more time with her children.

St-Hilaire has expressed a strong dislike of the use of English in Longueuil council meetings and would like Bill 101 amended to prevent its use.

[1] On July 1, 2016, St-Hilaire was expected to make a speech at the annual Canada Day parade in the Longueuil borough of Greenfield Park however she failed to show up.