Are we meant to view Grusha as a noble woman?

Act One appears to end with Grusha's act of charity when she picks up Michael and takes him with her. Instead, Brecht points out to the audience that they should not be seduced by how good Grusha appears to be. In reality, she is a thief who has stolen a child. "As if it was stolen goods she picked it up. / As if she was a thief she crept away." Brecht destroys the audience's image of Grusha for a particular reason: he does not want the audience to be seduced by her the way she is seduced by the child. Instead, he wants the audience to use logic much the way logic is used in the prologue. The audience must decide for itself whether Grusha is a thief and should be punished or whether she is a hero who should be rewarded with keeping the child. This sets up a direct analogy to the valley in the prologue; Grusha represents the peasants on the left who wish to steal the valley and put it to better use.