What happened to Sweeney's wife when she went?

Lucy Barker tried to kill herself after she was raped by Judge Turpin, who drove her to do so.Mrs. Lovett tells Sweeney Todd that she tried to kill herself, however she forgets to say she survived.She is mentally insane because she survived.Johanna Barker was taken as his ward after the Judge raped her.

Lucy wanders as a beggar.She tells Anthony that Johanna is a ward of Judge Turpin.She shows no bitterness towards Turpin because she can't remember her past.She does not remember the girl as her daughter, even though she knows her name.