Without saying it explicitly, Mrs. Jones reveals that she assumed he had come from such a desperate, impoverished situation; otherwise he wouldn’t have tried to steal her purse. However, Roger confesses that he actually wanted her purse so that he could buy himself a pair of fashionable blue suede shoes. In an instance of situational irony, Mrs. Jones says if that was the case, he could have asked her for the money rather than try to steal it.
Dumbfounded by Mrs. Jones’s seemingly ironic comment, Roger considers again the potential to flee through the open door. However, he overrides the impulse that tells him to run away, knowing instinctively that he can trust Mrs. Jones.