Covering her child with a blanket and he died: Is blood money and expiation required of her?

Question:
I have a mother who had a child who passed away a long time ago. The cause of death was that she had placed a cover, or a blanket, on him, and it was made of wool. This child died as a result of this blanket, knowing that she did not intend this act, but rather it was due to her ignorance of such matters. Now, is an expiation required of her or not?

Answer:
Yes, if she placed a heavy blanket on the child and he died because of it, then this is killing, but it is killing by mistake due to her ignorance. So, blood money and expiation are required of her. As for the blood money, if his father and the heirs forgive her, then there is no harm.
As for the expiation, she must free a believing slave, a male or female slave. If she is unable to do so, she must fast two consecutive months, sixty days, for this misfortune that occurred from her. We ask Allah to help her, and to forgive us and her and the Muslims.

Question: Does the mother not inherit from the heirs?

Answer: In any case, if his father is present, he is the one who inherits. And if he has a grandmother, she inherits, because the mother does not inherit, because she is the killer. And if he has no one else except his paternal uncles, or the residuary heirs, they are the heirs.