In 1882 she married Johann Georg Ernst Albert Heink (1854–1933), secretary of the
Semperoper, the Saxon State Opera Dresden; this violated the terms of their contracts, and both had their employment abruptly terminated. Heink took a job at the local customs house and was soon transferred to Hamburg. Ernestine remained in Dresden to pursue her career, and eventually rejoined her husband when she secured a position at the
Hamburg Opera. She went on to have four children with Heink: August, Charlotte, Henry and Hans. Ernest Heink was again thrown out of work when Saxons were banned from government positions, and departed to
Saxony to find work. Ernestine, pregnant, did not follow him; they were divorced in 1892 when Ernestine was thirty-one years old. Her breakthrough to leading roles came after an argument between prima donna
Marie Goetze and the director of the Hamburg opera, when he asked Ernestine to sing the title role of
Carmen instead, and without rehearsal, which she did to great acclaim. Goetze angrily quit the role of Fidès in
Le prophète, to be performed the following night, and was again replaced by Schumann-Heink who for a third time replaced Goetze as Ortrud in
Lohengrin the following evening, one more time without rehearsal, and was offered a ten-year contract. In 1887, Schumann-Heink sang Johannes Brahms'
Alto Rhapsody under the direction of
Hans von Bülow in a concert in Hamburg, with Brahms in attendance. She was then engaged by Bülow to sing in a cycle of Mozart performances later that year. However, she had to withdraw from these performances due to the birth of her fourth child, Hans, in November 1887. This withdrawal angered Bülow, and their relationship did not continue. ==Second marriage==