Insurgent (2015)

Continuity mistake: When Tris saves Christina from falling and then rolls on to her back you can see her sports bra underneath. In the next scene, she and Tobias have a brief sex scene where she removes the same top, but there is no bra underneath.

Four: Congratulations, Mother. You got your war.
Evelyn: I know you wish there was another way.
Four: But there isn't.
Evelyn: I'm the lesser of two evils. Is that it?
Four: You'd better be.

Question: At what point does Peter change his mind about his allegiance?