The truth about fear

Iceberg grabs Cassandra by the arm, her arm looked like a twig in his big hands.
"Don't ever talk to me like that again." He says in a cold, low voice. Cass stays quiet, her eyes filled with anger.
"Fuck you." She whispers, I brace myself for Icebergs reaction.
"What did you say?"
"I said, fuck you!" Cass spits in his face.
For a second I though those would be the last words my sister would ever sa