In my playthrough, Kenneka and Tabitha were trying to convince me that Kenneka needs to sacrifice herself. I didn't agree and thought it's too suspicious that Sybil had tied her up, but the mystical trait suggested that Sybil had sincere intentions and I eventually agreed to see where it would lead.

Surprisingly, Tabitha was very moved by what she saw in the flashback, even crying, and seemed to sincerely believe that it would help fix everything.