Draco just smiled as Hermione opined her terrible ordeal of having to clean up. What did she expect? Did she really expect him to do it? After all, cleaning was a woman's work. Was Granger too dense to even realize that cleaning was something she would be doing if she were lucky enough to marry a proper wizard; though Draco considered that unlikely. She would certainly need to when living alone with her cat.
He had been going for seductive as opposed to gentle, but it didn't seem that Hermione's misinterpretation hurt him any.
Wanting to needle Hermione a little, Draco said to McGonagall, "We have both been working diligently, Professor. I am glad you are happy." He spoke in a sickly sweet tone that belied his sincerity.
McGongall rolled her eyes, clearing she didn't buy Draco having done anything for a moment. She gave him a threatening look. "Mister Malfoy, I will be keeping my eye on you. Next time, do not think you will have someone to help you with your detention."
Draco looked annoyed, but didn't respond. Waiting for Hermione to leave, Draco watched as McGonagall finally did. "Old bat," he muttered under his breath in annoyance once she was out of earshot.