She married three times. First to Piotr Olewiński but as the marriage was not consummated, it was dissolved and Krystyna returned home. Then, she got married to Mirosław Szabuniewicz but this did not last long. Finally, she met Aleksander Hauke-Nowak, with whom she remained until he died in 1956 in Rio de Janeiro. As he was already married in the Roman Catholic Church, which did not recognize divorce, they made their relationship official in the Evangelical-Reformed Church in Warsaw.