She was a German medical doctor and the couple had a happy marriage bringing up one son and two daughters. Nielsen spent time in 1919 in Göttingen where he met Hecke .
Siya ay isang Aleman medikal na doktor at ang ilang nagkaroon ng isang masaya kasal nagdadala up ng isang anak na lalaki at dalawang anak. Nielsen oras na ginugol sa 1919 sa Gottingen kung saan siya matugunan Hecke.