The Secret Basement...
Paula was clear when she said no one could go down there and how only a few even knew of this secret basement. Then how come two little girls were allowed down there where such precious books of Winthrope history were kept.
Secrets of precious things aren't kept just to reveal to the biggest destructive machines on earth; children.
"Blame that to the fact that I've always been a very bright child." Sia again averted answering Teresa who had no recollection of the mansion itself to begin with.
Add to the fact of this heavy feeling that came to make it's home inside Sia's belly ever since she saw Teresa ascending those stairs inside the mansion.
To her it felt like she was walking away and Sia was never going to see her again. Like she was ascending to a different realm leaving her behind, alone and afraid in the darkness and with the demons.