Ron rushed to Hugo's place, his heart pounding. He felt like a terrible father for assuming from the start that his son's broken nose had been the result of a fight; never mind the fact his assumption resulted from the many fights he and his brothers had been involved in in the past, or that it was what actually happened. In his eyes, he still messed up.
Well, now it was his chance to fix that by being there for Hugo. He had no idea of what he could offer besides moral support, but if that's what he had, then that's what he'd offer.
He knocked, and opened the door as soon as he heard a voice inside, not bothering to acknowledge if it was allowing him to enter or not. As soon as he saw his son, he froze.