It was during a study trip to Paris in 1910 that Hammarsten met and fell in love with the 24-year-old Finnish sculptor, Viktor Jansson. In 1913 they were married and they lived in Paris for a year before moving to Finland in 1914. A daughter was born to the couple shortly thereafter, and Hammarsten-Jansson resumed work as an illustrator.[1] In 1924, Hammarsten-Jansson became a draughtsperson for the Bank of Finland.