He makes her get wet each time she thinks in him

With a smile he says "Now you can go to the party, but each time you think about me, you'll get horny like hell and you'll wish i was fucking you" then he's a wicked idea and smiles "you won't be able to ever cum unless you're thinking in me. If you cum with me fucking you, it will be the best orgasm you ever had". Then she runs to her room. All her way there she's moaning, excited, and he notices how much she thinks in him right now, probably in how much she hates him
Either ways, he's sure that may change soon, due to the way, thinking in him, will make her horny.
After a while, he hears her going. Good now you can rest before his parents arrive. He's some plans for them too