In Act Two, Lulu has married the painter Schwarz, who, with Schön’s assistance, has now achieved fame and wealth. She remains Schön’s mistress, however. Wishing to be rid of her ahead of his forthcoming marriage to a society belle, Charlotte von Zarnikow, Schön informs Schwarz about her dissolute past. Schwarz is shocked to the core and “guillotines” himself with his razor.
In Act Three Lulu appears as a dancer in a revue, her new career promoted by Schön’s son Alwa, who is now also infatuated with her. Dr Schön is forced to admit that he is in her thrall. Lulu forces him to break off his engagement to Charlotte.