What events make Janie finally come to fully trust and believe in tea cake? Chapter 11-13

At night, Tea Cake is waiting for Janie at her doorstep with a string of trout to eat. They have dinner and then Tea Cake combs Janie's hair, scratching the dandruff from her scalp. Janie asks why Tea Cake brought a comb. Tea Cake replies that he had been wanting to touch Janie's hair for a long time; he has had trouble sleeping because he has been wanting to touch her hair so badly. He tells Janie that she has beautiful hair, eyes, and lips. She lets others enjoy her beauty but she should stare into the mirror sometimes and enjoy her own beauty. Janie tells Tea Cake that he probably says that to all the women and Tea Cake says that that is true: "I'm the apostle to the Gentiles; I tell them and then I show them."