When Draco was a child, he told his father everything...marks, mates, complaints, desires...everything. Well, nearly everything. He could never tell Lucius how badly he wanted his approval. He could never tell Lucius how much his words about grades or missed snitches hurt. He could never tell him just how much he loved him.
Some things never changed, did they? "Yes. He's only been here a little bit. Regulus was with me before him." He looked at his father then, wondering about a reaction.