Young Sherlock Holmes (Rametep from the 4th teenaged girls' perspective)

What if the girl in the first sacrifice in the movie the trio watch, her parents were in the cult and talked to Ehtar about having their oldest daughter be the fourth sacrifice, maybe they weren't up there in the cult's hierarchy, and he had a list up to #3 and didn't have a girl for #4 or #5, so that's why he and his sister chose Elizabeth for the final sacrifice and the girl's parents brought her for the 4th sacrifice.