Complex sentence: Shelley recalled his mother telling him of Vaudeville comedienne Fanny Brice's using the word on stage whenever she made a mistake; she did this in lieu of cursing, so as not to offend her audiences.
Split into simpler sentences: Shelley recalled his mother telling him of Vaudevillian comedienne Fanny Brice using the word on stage whenever she made a mistake. She did this in lieu of cursing so as not to offend her audiences.