The gold medal match brought an end to the first mixed doubles curling tournament to be held at an Olympic Games.
Lawes, 29, was third for the Jennifer Jones team that went undefeated to claim women's team gold in 2014.
On Saturday, the Canadian contingent - Kaitlyn Lawes, John Morris, coach Jeff Stoughton and team leader Paul Webster - were concerned about the calculations and the effect they could possibly have on the standings.
In any event, they are the first two Canadians to win gold in curling at the Winter Olympics twice.
"I'm really proud of us for coming here and putting mixed doubles on the map", Morris added. Each team delivers five stones, but has six rocks in play because a stone from each team is pre-positioned in front of the rings and in the house. "The fact that we are family helped us a lot".
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Their priority was winning the team trials in December.
Defending world champion Switzerland (5-2) will face Russian Federation in the other semifinal Monday night (6:05 a.m. ET in Canada).
At the Olympics, there would be more adversity to overcome as a team. It just feels awesome to be part of this team.
Morris, 39, was an Olympic champion at the 2010 Vancouver Olympics playing third for the now-retired Kevin Martin, and Lawes won gold at the 2014 Sochi Games in Russian Federation as vice for Jennifer Jones.
But skills, shots and strategy honed through their years of successful team curling more than compensated that.
Lawes said she and Morris had prepared themselves to battle it out against Switzerland until the eighth end.
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Middleton's parents chipped in for part of the cost of her wedding to Prince William , as did Prince Charles and Queen Elizabeth. She paired a black bodysuit and wide-legged trousers from Veronica Beard with a Burberry tartan coat that retails for $2,765.
Formed by husband and wife Alexander Krushelnitskiy and Anastasia Bryzgalova, the Olympic Athlete of Russian Federation rink took the bronze earlier in the day.
Rios, who also won a world title in 2012 with Nadine Lehmann, struggled mightily shooting just 50 per cent for the first four ends. Though they had the last-throw advantage, the Swiss flubbed the shot, giving Canada a steal of two points. Perret was left with a hard shot to score and was unable to do so, giving Canada the steal of two and forcing the Swiss to handshakes.
"I call her Mighty Mouse", Morris said. "She goes about a buck-10, five feet tall, but she can sweep better than a lot of men out there".
Canada's John Morris and Kaitlyn Lawes beat defending world champions Jenny Perret and Martin Rios of Switzerland 10-3 in the gold-medal game.
"I just wish he could see this", Cheryl said. We got off to a great start.
Well, seven rounds of round robin, a tie-breaker and two semifinals later, it's time for the mixed doubles curling medal matches. Even actor Mr. T has been tweeting his love for the sport, much to the amusement of Morris. "You heard me, curling Fool!"
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"There are a lot of ups and downs in mixed doubles", Morris said.