Neville stilled, eyes immediately darting over to Harry before looking back to Ron. He was pretty sure Harry knew, and he figured he should just go on and get it out, off his chest - because really, it was Ron, right? Neville had taken Ginny to the Yule Ball and Ron hadn't been bad about that and that was his sister, after all. And Zach had been DA, even if he hadn't exactly been cheery. He'd been such a damn skeptic, really and Neville suddenly realized he... hadn't really tried connecting the two images of Zach before... was he really the same boy Ginny had dive bombed? Neville couldn't really match the image of that boy with the man who spent Christmas with him.
"Yeah, but he might not show," Neville said, turning his eyes back to Ron, trying desperately to remember Zach from Hogwarts, but he just couldn't do it. The person he'd invited was different, right? Different to Neville at least, and yeah, the difference in the two forms of Zach bothered him a bit, but this last week had been so... nice... that Neville was willing to push it aside.
Still, push it aside or no, he didn't blurt out immediately that it was Zach... He wanted to give it just a little more time.