While Paul raised their son, painted, and cooked, Lily generated their income by working as a piano teacher.
[4][5] When Paul Klee was drafted into World War I, Lily ensured that he was assigned to a post behind the lines.
During that time, she continued to earn her family's income as a chamber musician and piano teacher in Weimar.
The letters between Lily and friends, doctors, and medical experts have allowed researchers to piece together many details about the progression of his illness.
[6] After her husband's death in 1940, she arranged for an honorary commission to administrate his artistic estate, assigning it to public collections in Switzerland.