Poppy are you out there?

I just finished The Sister by Poppy Adams. The book was recommended to me (by a very reliable source), and it is sort of a gothic mystery (right up my alley), and though I loved the novel, it left me scratching my head. I have so many questions and no answers! So Poppy if you are out there, or anyone who has some input on the matter, here are a few questions:

• Was Ginny really a famous lepidopterist (one who studies moths) or was this a figment of her imagination?
• Who really killed Maude?
• Why did Vivien allow Maude to carry her baby if she was unstable? Or was she really pregnant?

You see my dilemma? I should have known when the last patron returned the book and we had the following conversation:

Me: How did you like the book?
Her: Weird
Me: Good weird or weird weird?
Her: Weird

I think it is good weird, but take a look and let me know what you think.