On 20 February 2018, she skated the B-finals in the 3,000 metres relay at the 2018 Winter Olympics and her team set the world record time of 4:03.471. Incredibly, their effort for that record was rewarded with a bronze medal because in the A-finals Canada and China both were penalized and disqualified leaving only two A-finals teams to get gold and silver. The Netherlands received a bronze medal even though they didn't skate in the A-finals. This was her first ever medal in short-track speed skating at the Olympics. Ter Mors became the first female athlete to win Olympic medals in two different sports at the same Winter Olympic Games.