Another thing she noticed was how often Harry was looking at the Slytherin's table, particularly at Draco. That caught her interest because Draco seemed to notice it too and when he looked back at Hermione, she lifted her perfect eyebrow in question. He just winked at her in return, small smirk on his face visible. She did write a mental note to ask Draco what happened yesterday and why he was late. Clearly something happened between those two.