She earned only one individual medal at the 2015 World Championships in Kazan .
It was still a happy occasion for the Campbell family , as younger sister , Bronte , won gold medals in both the 50 and 100 free .
Although she earned only one individual medal at the 2015 World Championships in Kazan , it was still a happy occasion for the Campbell family , as younger sister , Bronte , won gold medals in both the 50 and 100 free .