As Jenna was trying to redo her make-up according to what Sarah and Tiffany were doing to her earlier (but failing miserably at it), she heard someone walking up the stairs. She hadn't heard the front door open and close or the yelling downstairs, so she didn't know that her sister Zoe was home.
Thinking that it was Steve, she ran out into the hall with a look of fury. This whole situation had gone too far. First, Steve turned Jon into a girl and then a slut and then he made her suck his cock and now he was making her dress up in this ridiculous pink latex mini-dress to go out on a "date" where they were just going to fuck each other.
She knew that Steve had the stone with him. How else would he be able to put her mom to sleep? All Jenna had to do was tackle him, knock him out, and take the stone from him. Steve wasn't all powerful, as long as he didn't make a wish.
But Steve wasn't the one walking up the stairs at that moment. It was Zoe. And when both of them met in the hall, Jenna the Slut returned.
And Jenna the Slut hated her sister.