Friends With Benefits doesn't rely on getting Primrose jailed. That has been a huge misunderstanding among players since the update when this content was first introduced. If she gets arrested at all, that will make it easier to get FWB (and harder to get a relationship), but it's not the deciding factor. While I haven't doublechecked the code right now, the easiest way I can remember to not have Primrose take you seriously as a partner is to not read the book she tells you to read. That is the moment that Primrose decides to test how superficial you are towards her.So I restarted a save, just to see how easily things integrated into the game now that certain things are available at earlier times.
I was reading the walkthrough about a route with Primrose where you're just Friends with Benefits. My problem with that is, I've tried to get that route twice (I worked from a save from before she got arrested). I've left her in there 2 days and 10 days and I've tried combinations of her being clothed and naked the whole time. When she gets out, she still wants to be lovers regardless.
What am I doing wrong, has anyone else accomplished this?
But in the end, it comes down to how you treat Primrose across the entirety of the game. Everything counts, even the dialogue options you choose with her during the tutorial.