[Achilles]

If the storyline was for Sasha to go in and cause drama in some way, but then the plan was axed, maybe they just thought to end the showmance story as people were hating it rather than being entertained by it. Sasha going in might have got interest from viewers, but no Sasha and there is nowhere left to go that viewers give a sh.. about, it's dull. So Kimberly is not much use anymore, they decide she will be the one chosen to be evicted on Friday. But she decides F that I'm walking.
The Kimberly and Steven relationship was just a staged showmance and she will just go back with Sasha and carry on with her playboy modelling.