Let me overanalyze this.
Tabitha is not Victor’s mother—that’s definite. But also, from my research, she’s not Victor’s sister. Instead, she’s a new character who’s only seeing visions from the past, just like the other characters. What she’s seeing is the past of those who lived in the village before her. This conflict, in my opinion, will come to light in episode 10—unless there’s a production error.
Here’s the proof: Tabitha has a mole under her mouth on the right side. We saw Tabitha having a vision from the past in a scene of a character hugging Victor and Victor’s sister. But the person in that vision doesn’t have a mole under her mouth! This means that person isn’t Tabitha.
However, there’s something new: even young Tabitha didn’t have a mole! This means the visions we are seeing through Tabitha are of events in the past (a specific event) involving a certain person who lived in the village—just like the other characters are imagining people who lived there and how they died. So, what we’re seeing isn’t Tabitha, but a character from the village’s past.
Another thing is Tabitha calling her mother when she returned to reality. This means she has a mother. But here’s the problem—was this real? She saw and imagined that child, and we learned from the white child that the trees are roots that extend throughout the village. Do they also extend outside the village? With the appearance of the child, I think yes or no the priest told the .
Also, the priest asked Tabitha, “What’s the name of your child who died?” She said, “Thomas.” On the same day, someone called Tabitha’s husband and said, “I’m Thomas.”
It’s been four days since she “left” the village in reality (outside the village), and we learned this through Victor’s father conversation with her. She said she’s been outside the village for four days, and inside the village, Julie also said she’s been outside for four days. So, did she actually leave the village, or not? Can the trees spy, see, and hear everywhere, or is the priest one of them and the one who told them about Thomas?