How does Jane Auesten vidly convey fanny feelings in chapter 18?

If there is anyone who can withstand the social pressure to conform, it is Fanny. She naturally shies away from attention, and is horrified at the idea of standing on a stage with all eyes on her. However, even she cannot withstand the pressure to play the role of the cottager's wife, especially when Tom hints at her powerless social position. When Edmund also pleads with her to take the role so that the show can go on, she feels compelled to capitulate despite all of her misgivings. She is, after all, in love with Edmund, and these feelings overshadow her moral stance on the matter of the play. In short, Fanny seems to be the only one who has actually read the play and is thus capable of making an informed decision. Everyone else, it appears, is in the dark.