Sara felt herself freeze for a second as Tracey drew her wand. Would she really hex her? The look on Tracey's face said that she just might. Then she remembered something that she knew would at least halt Tracey. "You wouldn't hex me, don't even pretend to try." She smirked. "You do and I can tell Daphne about you and Heidi in a second and within a few hours it'll be all over the school," she played her trump card. She knew Tracey, with her hobby for gossip would know that Daphne was, with the possible exception of Lavender Brown, one of the biggest and possible more accurate gossip in the school.
Sara chuckled, "Keep fooling yourself then." She grinned at the hiss from Tracey and pressed down harder. If she couldn't mark Tracey with her lips, she'd mark her with bruises from her grip.
Sara tilted her chin up at Tracey pressured her wand, but kept her arrogant grin. "You will always be mine." She hissed. "You may not want it, but I was your first, you can't have another one of those. And you always remember it. I'll be with you for a long time."