Did the Governess Kill Miles?

When Miles dies, there seems to be little explanation for this occurrence other than the governess's—he has been dispossessed, and this has killed him. ... Readers who view the governess as mad tend to speculate that perhaps the governess killed him by hugging him too hard and smothering him.

Did Miles die at the end of Turn of the Screw?

Miles dies at the end of James' novella, and it's not entirely clear if it's due to the ghost of Peter Quint or the governess' smothering overprotection of the boy. Bly Manor takes a different path and reveals the characters being told the story are actually the story's characters grown up.

Why did Miles get expelled in The Turn of the Screw?

Somewhere little Miles had learned some naughty or evil words. It is quite possible that he had earlier learned them from his association with Peter Quint. He repeated these words at school and when others in turn repeated them, little Miles was expelled from school.