Lola and Karol Felix were liberal Jews: they did not observe Jewish customs, including not keeping a kosher home (in fact, Kitty states that she did not even know what kosher was until after her family had fled to Lublin); and the family only attended synagogue at occasions. Despite this, they were very much a part of the Jewish community: the majority of people the family mixed with were Jews, with Kitty herself frequenting Jewish social clubs. Additionally, Kitty also attended a Jewish primary school, and following this, was a pupil at the Convent School of Notre Dame for a year (after which the war broke out), which although not a Jewish school, was predominantly attended by Jews. The school was a private all-girls school, and people came from miles around to attend it, as it was very prestigious, with alumni including a set of twins who were descended from the Habsburg dynasty.