Harry realized, when he reached for his wand and fumbled it, that his hands were shaking. He couldn't find any words to respond to Ron at all, and then Hermione was there, which didn't make it any easier to find words.
There was nothing for it, really. He couldn't think of a single way to say it, except to say it.
"Hermione," he said, voice hoarse and teetering on the edge of breaking, "V-" Oh god, he only barely caught himself in time. "You-Know-Who has your parents."