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.