She basically told Simin her husband didn't cause the miscarriage and got angry when she was ?forced? into the moral dilemma of having to lie in front of the Quran. But if they don't pay, her husband would keep harassing them. I find her anger quite unjustied.
ًWho said it was justified? She is as frustrated as she could be. She is between two fires:
1- Having to tell her husband that her miscarriage was not -necessarily- caused by Nader
2- Having to swear before Quran with lies, which she cannot do because she is religious and knows that swearing before Quran is a way of telling the truth.