In Helsinki on 9 January 1836, she married Pavel Nikolayevich Demidov (1798 - 1840). In 1846, after Demidov's death, she remarried to Andrei Karamzin. After the death of Aurora's second husband, she occupied herself with the practical matters of her Järvenperä manor in Espoo, Finland and with her growing interest in charity. Karamzin used the immense wealth inherited from her first husband to create benevolent institutions in Helsinki, such as schools, public kitchens and the Deaconess Institution of Helsinki. She was considered a great benefactor in many cities such as Saint Petersburg and Florence.