Factual error: In the dramatic final confrontation, the husband tries to shoot Julia, only to find that the gun is empty. The problem is that slides on automatic pistols like the one used in this scene lock open when the last round is fired. The slide on this gun is visibly closed, so it should still have a round in the chamber.
Factual error: When Julia Roberts first moves to the small Iowa town, she picks perfect fall apples off her neighbor's tree, which draws his attention. But the next day, that tree, and most of the others in the town, appear in SPRING bloom. Some days later, she attends a July 4 parade. That timing might work with the blossoms, but certainly not with the apples.
Factual error: When Laura visits her mother in the nursing home, Laura comes out of the bathroom and says that she has her mother's medicine (pills) for her. Meds would not be kept in the patient's room at the nursing home. They would be distributed by a nurse, such as they are in the scene when the nurse interrupts the husband right as he is about to smother the mother.