What does the exchange between Ethan and Zeena at the end of chapter 2 tell us about their relationship? Cite from text.

At the end of the chapter, we as readers can infer that the relationship between Mattie and Ethan is going to move past flirtation into a relationship.

Without answering he moved away toward the kitchen. As he did so his glance crossed Mattie's and he fancied that a fugitive warning gleamed through her lashes. The next moment they sank to her flushed cheeks and she began to mount the stairs ahead of Zeena.