I love this! I've always been a big fan of Slytherins, and Tracey Davis is one of the most under-written characters ever (mainly because she's not even in canon for exposure) (oh, and I guess that's why this is a rarepair). This is lovely and cute and short. I'd love to see what happens to their relationship after they've had this sort of non-confrontational confrontation. Like feurerfunke already said, it's obvious they're both Slytherins.

Great job!