Explain about the conversation between Cilla and Johnny. What does Johnny understand about her now? What are his feelings about Rab and Cilla? What brought this about?

Talking to Cilla, Johnny learns that Mrs. Lapham has married Mr. Tweedie. He also finds out that Rab has been taking Cilla out walking without telling Johnny. However, Cilla says she could never marry Rab because her married name––Priscilla Silsbee––would sound silly. She remarks that Priscilla Tremain would be a fine name. Johnny notices that Cilla has grown into a beautiful woman. They have a romantic moment and she gives him an apple. Johnny considers this a symbol of their relationship and is furious when Rab eats it.