At least he could understand the importance of keeping a source confidential. She might have been intensely curious to know just which mysterious people he was out there meeting every few days, but she knew better than to pry. If he wasn't sure that she needed to know, he wouldn't tell her. The same would go for Hermione. Besides, she wasn't sure how he would feel about Rodolphus" sort-of nephew being her source for anything. No doubt he would be suspicious that anything Draco told her was just being fed to her by Rodolphus. Of course, he would have a legitimate fear. She worried the same.