You are the daughter of Severus Snape and therefore, you have to follow in his footsteps and be a Death Eater like him, but you're not officially one, you're like a servant to them. And being Snape's daughter also means knowing Draco. He was at a meeting, all the Death Eaters were at the Malfoy mansion.

Draco isn't forced to attend all the meetings, so when you're standing by the door and someone suddenly pulls you out, you realize it's Draco, but you panic a little when he shushes you.