[Cain is left dumbfounded, although he should have been expecting it from the start.
The Dome is not that big. She can't hide forever if she ends up here, not that she would. Unless she starts committing crimes and somehow avoids dying in a city with no power supply, and no protector.
Not only that, but there is more than one dome. If there are three, there are possibly infinite domes. How could they assume Dorothy would show up here and not there? In their omnipotence, wouldn't it make the most sense to separate Mother from her Children?
The sickness sets in. He only had the energy to pick apart Birdman's reasoning for a little bit before the seeds of anxiety finish germinating. He begins to fold.
He isn't the favorite child. He was made only to get his hands dirty. And maybe Birdman didn't understand that, but he would after he was done with Rion. Rion: strung up by his organs for Mother. Lilia would be left defenseless in any capacity.
He knew what he should do, he nodded to himself, shaking and chewing his lower lip.
He had to be swift while he could still pinpoint Rion's location.]