Amy had turned desperately pale, and in a pettish, trembling tone, she said:
"Yes, I will tell your mother."
"You promised not to do so."
"I don't care, I'll break my promise."
"Oh, Amy, you are real mean."
"I can't help it if I am."
"You can't?"
"No."
"Why not?"
"I am mad—real mad."