Draco Malfoy was, for lack of a better word, fucked. He watches his insane aunt approach Granger, and felt his heart speed up. This would be the defining moment of his life, he could feel it. This would be the moment where his bluff would be called and his family disowned him. Or he would continue pretending and hate himself for it. He glanced towards his mother and father, both so sorry looking yet firm in their beliefs, and knew it was time he was a man of his own. His hand griped his wand so fiercely he felt his knuckles whiten- about to pop. He thought back to when Greyback and his cronies brought three mangled looking teenagers to his pompous abode, and the moment of certainty when he took a good look at Potter. It was him, definitely, but if he had said yes his father would've called the Dark Loon and then he would really be utterly fucked.
Draco had been pondering about the sanity of his father, aunt and the madman they served for about 5 years now, ever since he heard about Grangers grades and the reluctant admission by Snape to McGonagall he overheard accidentally. "Yes, your golden puppy is definitely smart. But I can't stand her know-it-all behaviour and horrible personal hygiene, have you seen her hair? It looks like..." that's when Draco understood that if his beloved godfather admitted that the Mudblood was smart, then something was fundamentally wrong with his fathers' theory. And so, he continued to play the part of the sneering, insulting git when in reality what he wanted to do was to ask Granger for help in Arithmancy. Of course, that would never happen, but it explained why he had failed so miserably in killing Dumbledore and why he hadn't been eager to take the Dark Mark (that remained unseen on his unblemished, perfect arm)
So really, it was quite normal that the Fates put him to test in this way. He would either own up and take his aunt down and flee for his life, or he would act on and probably regret it for the rest of his life.
He had just come back from moving the Snatchers his aunt had stunned to the garden when he entered the room, covering his ears due to the suddenness of Grangers screams. She was writhing on the floor, and he knew how that felt like. Suddenly, this image was what convinced him of their shared humanity. Draco had been in the same position several times when his aunt was displeased with him. He though quickly, thinking about escape routes and elves that were loyal to him, before summoning his most loyal elf, Pinxy.
"Master Draco has called?" said a quiet voice to his right. He couldn't see her, and that was just as well. He was glad he had taken the initiative of ordering his elves to appear invisible to everyone and only be able to talk to him when the Dark Loon had taken to torture elves for his amusement.
"Pinxy, I need you to take the prisoners that have been locked into the cellar to the house only you and me know about. Then come back."
"Yes Master Draco"
Now that that part of his last minute plan was enacted, he surreptitiously Stunned his parents that were on the other side of the room. They were both sitting down towards the fireplace and so giving their back to the scene that he was witnessing. Greyback was coming back from the cellar now, and appeared just to the right of Draco. Seeing the creature, he mustered all the hate he could and killed him with one wordless flick of his wrist. Greyback collapsed, and Draco couldn't help but feel guilty that the first time he attempted the killing curse had been so successful.
He was now basically alone with his aunt and an agonizing Granger. Before he could think too much about his actions and capitulate he sent a Stunner to the back of his aunt that, surprisingly, worked. She was too focused on inflicting pain on Granger in order to notice anything going amiss in the drawing room. Seeing that his insane, yet extremely strong aunt, was crumpled on the floor he made his way to Granger.
She was a sight.
Her bushy hair had twigs and leaves, and her skin was a shade of pale that did not seem healthy at all. Her eyes were closed in a rictus of pain, and a thin line of blood was coming out of her mouth, which had an expression of utter pain on. Her muscles moved spasmodically, and he knew she wouldn't be able to walk for a couple of days at least. He bent down and cast a diagnostic spell to see if she was in imminent danger of dying, and was relieved when he saw that her broken ribs were just broken ribs, and had not punctured a lung or caused any heavy internal bleeding. He felt a small hand touching his shoulder, and knew that Pinxy had returned. Picking Granger up he held on to Pinxy and felt his world dissolve around him.