After Sam left, Sia just stood there with a lot of thoughts going on in her head. She doesn't know how to react to this situation or how to proceed. The rational thought would be to kill Sam and be done with it.
Their secret would be safe and they can proceed with their lives as they are now. But the thought killing Sam didn't feel right in her head. She felt extremely uncomfortable. She looked at the wheat field they are working on and moved towards the hill nearby which had a creek that led to an underground room.
Within the secret room, Gran is looking through some letters.
Twin sisters. The resemblance is uncanny not just physically but also in terms of their temperment. They are extremely similar. At this moment the only difference is that Sia is in a gloomy mood.
"What happened Sia? Why are you unhappy? Did Sam do anything?" Gran asked with concern.
"He knows."
"What?"
"He knows about us.