"I'll check mine, as well," Percy said. Normally, he thought it was rubbish, and he and Penny didn't need to write each other when they were living in the same flat, but once she went on the run, he knew he'd check it vigilantly and thoroughly.
He bowed his head when Fleur asked after Penny, but he nodded. "She is," he said. "If you ask my brothers, you'll learn that she's my ex girlfriend."
Because she might, he realized, so he may as well not keep secrets.