Anne called her "Aunt Ilse," though they were not related. There were several connections between their families. "Aunt Ilse" was the mother of Anne's friend, Sanne, and Margot's best friend, Barbara. Like many in the neighborhood, they had emigrated from Germany. She was Dutch by birth and played piano. Among others, she and her husband, Franz, played music, in neighborhood homes, every other Sunday. Anne sometimes went to these concerts, which were largely a way around restrictions against Jews going to movie houses,Along with Sanne and her husband, she was deported on 20 June 1943, and gassed immediately after her arrival at Auschwitz.