Nnedi Okorafor said this quote

The Nuru men, and their women, had done what they did for more than torture and shame. They wanted to create Ewu children. Such children are not the children of forbidden love between a Nuru and an Okeke, nor are they Noahs, Okekes born without color. The Ewu are children of violence.An Okeke woman will never kill a child kindled inside of her. She would go against even her husband to keep a child in her womb alive. However, custom dictates that the child is the child of her father. These Nuru had planted poison. An Okeke woman who gave birth to an Ewu child was bound to the Nuru through her child.