What do I feel about Zeena?

I don't like Zeena at all. She is only interested in the treatment of her own "illness." Throughout the novel we don't know if she is really sick or if she is just displaying a degree of hypochondria. She doesn't thank Ethan for his support and his effort to pay all her medical bills. She sees it as a matter of course that Ethan gives every single penny he makes to her and her sickness. I don't think Zeena is a nice person. It seems like she is only caring about herself.