Your police brutality remark reminded me of another answer you made here waaaaay back. Maybe it makes sense now? All the failures makes vi super jaded. While power has blinded Caitlyn. But she feels responsible for how things turned out to Vi. So she keeps her in the enforcers where Vai gets to best up people in the regular. Maybe they have something physical. But all pretense of romance is gone. Bittersweet ending?