Karl Hansen and Anna Sofie Hansen

My grandmother Clara is the 4th child of karl and sophie and was born in 1896. In 1918 she married John Tavlaridis in New Zealand. I believe at that stage she already had a child herself my mother Joan Merline Elsa....does anyone have any information on this.... After her marriage to John Tavlaridis my grandmother migrated to Tasmania, where John died in 1921. My grandmother subsequently lived in Melbourne I am unable to find any records relating to her after 1931....can anyone assist.