She doesn't tell you to stop at all if you go roughly, I wrote the scene and explicitly at no point does she withdraw her consent, tell you to stop, or say no, and on Day 11 she will ask you to have sex with her anally in the same way, hardly the way a rape victim would act? This is on top of the fact Steph isn't stupid, and when she has been encouraging you to be rough with her and then agrees to anal, she is very aware this will likely end up happening roughly, and she goes ahead with it. So whilst it is rough, it definitely might not be to too many people's tastes and you might not like it, or want to do it, it isn't a "rape scene" as you're perpetuating.
And Steph
is a masochist. I made her character!
Anyway, as I said, you can have a vanilla relationship with her if you want to, but you
will bore her sexually and as result, you'll have significantly fewer scenes with her than somebody who engages with her fetishes and excites her.