What did Cherry say to Pony that made him mad?

When Cherry asks Pony about Johnny, she can't bring herself to go visit him in the hospital because he is the one who killed her boyfriend, Bob. Ponyboy understands, but is still mad because he knows that it's not Johnny's fault Bob is dead. He tells her, "I wouldn't want you to see him. You're a traitor to your own kind and not loyal to us."