Expiation for killing a cat unintentionally

Question: A woman killed a cat unintentionally, and she is asking whether she has sinned in killing it. She is searching and wants the answer: Is her soul obligated to pay for it? And what should this woman do?

Answer: There is no blame on the one who killed the cat if she did not intend to do so. However, if she intended to do so without a cause that necessitates it, she must repent to Allah for that.
As for if she killed it because of its harm, and there was no safety from its evil except by that action, then there is no blame on her.