How does Nwoye react toward this event?

When Okonkwo returns later that night, Nwoye knows that Ikemefuna has been killed. A terrible sadness comes to him. He does not cry, but something in him has been broken. The last time he felt this way was during the last harvest season. He had been in the forest with his family, bringing back yams from the harvest. They heard an infant crying. The women fell silent and walked faster. Nwoye had heard that twins, considered evil by the Igbo, were left to die in the forest. He had never come across any. A great sickness and sorrow came over him. He has that feeling again now.