What causes Marian to abruptly leave the woman's room in a visit of charity?

Marian abruptly leaves the woman's room during the visit of charity because she is overwhelmed by the woman's condition and struggles with feelings of guilt and helplessness. The stark reality of the woman's poverty and suffering forces Marian to confront her own privileged position and shakes her deeply. She leaves in order to collect herself and process the intense emotions she is experiencing.