Read the excerpt from Roll of Thunder, Hear My Cry.
When we were alone, [Lillian Jean] confided her secrets to me: the boy she had passionately loved for the past year and the things she had done to attract his attention (with no success, I might add); the secrets of the girls she couldn't stand as well as those she could; and even a tidbit or two about her elder brothers' romantic adventures. All I had to do to prime the gossip pump was smile nicely and whisper a "Miz Lillian Jean" every now and then.
What motivates Lillian Jean to tell Cassie all her secrets?
her feeling of superiority over Cassie
her feeling that Cassie cannot be trusted
her need to trick Cassie into liking her
her need to make Cassie feel jealous