Could I have opinions on my first chapter for my book?

It's really good so far, I didn't notice any spelling issues and it was grammatically consistent. My only problem was I didn't realize that Opal was Ithaca's sister until like the end of the conversation... I thought she was a friend or a maid since she had to explain and help Ithaca get dressed. And the level of formality was a bit odd, not necessarily bad... just odd. I understood why the conversations were proper but some of the phrases and words you used might not jive with certain demographics.