Finally sure they were safe, he turned back to the pair, his mouth open and ready to speak, but Granger got there first, "This is a blood-replenishing potion," she said, accusatory, the potion held out between them once again, "Why would Harry need a blood-replenishing potion?" she sounded frightened now, "What on  earth happened last night?!" Draco bit his lip, struggling to find an excuse; he opened his mouth, but Granger interrupted him before he could speak, "Draco - if you don’t tell us what’s been going on, I will pour this potion out on the ground right now," Draco froze, not believing her, but not sure if he should risk it, "I mean it, Draco!" she snapped, "I’ll march right up to the castle, and never even mention a word of this to Harry. Instead, I’ll go to McGonagall and make her drag Harry to the hospital wing. Whatever you two have got going on will be exposed to everyone, and Harry will never know that you even tried to give me this potion," she wiggled it, her expression hard.