Justin Trudeau three half-siblings, Kyle and Alicia, from his mother's remarriage to Fried Kemper, and Sarah, from his father's relationship with Deborah Coyne. Trudeau lived at 24 Sussex Drive, Ottawa, the official residence of Canada's prime minister, from his birth until his father's government was defeated in the federal election on May 22, 1979. The Trudeaus were expected to move into the residence of the Leader of the Official Opposition, Stornoway, at 541 Acacia Avenue in Rockcliffe Park, but because of flooding in the basement, prime minister Joe Clark offered them Harrington Lake, the prime minister's official country retreat in Gatineau Park,
Harrington Lake who bought property here in 1867. The retreat is accessed by Chemin de Lac Meech with a gatehouse, staffed by the Royal Canadian Mounted Police Protective Policing Service, at the driveway of the retreat. The Prime Minister's motorcade accesses Harrington Lake from Ottawa via Quebec Autoroute 5. Several families came in the 19th century to settle the Harrington Lake area, including the Harrington and the Mousseau families. The lake eventually became known as "Harrington Lake" in English and "lac Mousseau" in French. The Mousseau family had built a farm on the shores of the lake, which remained in the family