Hermione wasn't sure how Malfoys dealt with losses of temper and raised voices. A big part of her hoped that after she heard the front door slam the night before that it would only be a matter of time before Draco came home cooled off. Each of them needed to go to their corners and lick their wounds. Once ruffled feathers were soothed she wanted him to come back, slip in the covers behind her, and apologize for being a complete arse. Of course, she knew he was stubborn enough to not be willing to admit that he was completely at fault. Hadn't the incident in the forest when she completely humiliated herself by getting confused and calling out to Harry proven that he couldn't just casually throw out the "crazy" word?