Sara had been watching Daphne from the corner all night. Yes, she had made her mandatory appearance at Theo's side, but soon made an excuse as to her not feeling well. Theo had dismissed her without a second thought, too busy talking to his guy friends about quidditch. She was planning on finding Clara for a little fun, when Daphne caught her eye, making eyes at Theo, obvious to anyone who looked at her. Not that Sara cared that they were shagging, less work for her, but she hated that Daphne made it so obvious, making a fool of Sara. It made her furious.
So, hatching a plan, Sara quickly returned to her room, changing out of her school uniform into a pair of very well fitted black pants and a red polo, one of the very few muggle things she owned. That was the only good thing to be said about muggles; they did have a decent fashion sense.
Grabbing one more thing, a ribbon she had stolen after she had seen Gabrielle Delacour kiss it and tie it to Macavoy's broom when she had left it for a moment by the stands. Sara was aware that the Delacour's were Veela descendants and she also knew that an article like that ribbon would be chock full of those infamous pheromones.
Tying the ribbon around her wrist in a way that, if she touched Daphne the ribbon would touch her as well and release the pheromones, Sara made her way back to the common room to watch Daphne steathily, waiting for the opportune moment to strike, and get ehr revenge, as well as hopefully some blackmail on the redhead, which would protect her if Tracey did decide to try and out her.