Hermione ignored him and spoke to Harry. “I couldn’t help overhearing what you and Malfoy were saying —” “Bet you could,” Ron muttered. “— and you mustn’t go wandering around the school at night, think of the points you’ll lose Gryffindor if you’re caught, and you’re bound to be. It’s really very selfish of you.” “And it’s really none of your business,” said Harry.