She and Louis were separated in 1931 and were divorced in 1938, although they remained friends for life. Lil appeared in several Broadway shows including "Hot Chocolates" and "Shuffle Along". In the late 1930's Lil recast herself as a Swing vocalist and cut 26 vocal sides for Decca records.
In the 1940's she moved back to Chicago and played
as a soloist in nightclubs.

She continued to record sporadically up until 1963, often with the old gang of New Orleans-Chicago musicians like Johnny Dodds, Red Allen, Zutty Singleton, Frankie "Half-Pint" Jaxon, Lonnie Johnson, Buster Bailey, Natty Dominque, Lovie Austin, and Sidney Bechet. Lil kept active in the music business for the rest of her life, although far from the limelight.
Strangely enough, Lil died in Chicago while playing "St. Louis Blues", just two months after Louis had died.