On the non-Others route, I see it this way: it is MC who will have the opportunity, through his actions, to move away from his LI back to Zoey.
DPC makes traps on every route. Throuple is unstable and this can be seen in Ep.9 with their RP points - it is very easy to do something stupid, stealing money from Jill, Bianca, Jade and the video, Bella-Jill love triangle. And also cheating points, which accumulate from your actions. DPC gives us the opportunity to be an asshole and ruin the route with our actions.
That is, depending on MC’s previous actions, I think that it is he who will make a move on Zoey, and not she who will try to steal him. I look at her personality and it just doesn’t fit that she would try to take a guy using dirty methods.