The moment the door had shut behind them, Bill whirled on his sister. "What do you think you're doing?" he demanded, grasping her by the shoulders so that she couldn't wriggle away. "He is from Outside. If he's taken with you, he'll demand you go with him when he leaves!"
"I wouldn't go away with him," Ginny said quietly, her tone defensive. "You know I wouldn't."
"Then he'd want to stay with you." Bill sighed. "Gin, don't you see? They leave us alone. You and me. They won't leave Malfoy alone. And if they get him, if they get a taste for wizard again - Ginny, I can't guarantee we'll be safe if it starts again."
Ginny stared at him, incredulous. "Are you seriously trying to tell me that if I ever kiss a boy we'll all die? Bill, I'm twenty-five years old! You can't go and-"
"Please," he said softly, reaching out with one hand but stopping before he touched her shoulder. "You're all I have left, Ginny. I don't want to lose you, too."
She burst into tears. "Damn you. Damn you."
"Ginny-"
"Why do you always make me want to do what you say?" With that, she whirled and left the room, leaving Bill standing just inside the door and staring after her.