That is correct! Caroline's parents were Johann Busse and Emilie Brehm (Johann's 1st wife). The adopted mother of my ggrandmother was Wilhelmina Roehlich nee Busse. She was the 1/2 sister of Caroline. Her mother was Caroline Exner (Johann's 2nd wife).
They also had a brother Samuel Peter Busse that came to the US. He died young in an accident but had several relatives. I have been in contact with one of his descendants. I have found birth/marriage records that trace the Brehm and Busse lines to 1827 in Zdunska Wola, Lodzkie, Poland.