Jon appeared in his room, having sex with Karen, while Zoe appeared in her room having sex with Sarah.
Sarah didn't want to be part of the wish and especially didn't want to have sex with Zoe even Jon would of been better. But since it was a wish, she didn't have any choice. She did still have the stone though and could wish herself out of there. Realizing she could end up in worse situation if she didn't word the wish carefully, she decided to keep it simple.
While she was thinking all this Zoe had been caressing, kissing and sucking all over her body, which, despite her hatred of Zoe, was causing her to get turned on and making it hard to think straight. Sara suddenly realised that she was doing the same to Zoe.
Meanwhile Zoe was caught up in the moment and the feelings in her body and she grabbed Sarah's hands and pinned them to the bed as ahe moved herself into position to 69 her. Her hand was touching to stone in Sarah's hand as she said "I wish..."