Continuity mistake: When Charlize Theron leaves the orphanage, she lies in the car's back seat because she doesn't feel well. However, she is shown sitting upright as they drive away, but lying down again in the scene after.
Continuity mistake: When the couple is parked at a drive-in cinema and watching a dark screen because of a blackout during World War 2, the shape of the screen is that for widescreen or Cinemascope movies, not common until about 10 years later.
Answer: She was not married to the baby's father, which would have been an absolute stigma at the time.