Factual error: When Homer and Candy go to the movies, the theater has stadium seating. This seating style in theaters wasn't used until much later, not in the early 1940's, and certainly not in Maine.
Factual error: When they are assembling a breathing tent for Fuzzy the window of the tent is made of clear plastic which was not available at that time.
Answer: She was not married to the baby's father, which would have been an absolute stigma at the time.