What else could he do, really? The joke took the edge off and made everything seem less grim. It was, in fact, very grim. They'd been dead, and yet somehow they were both standing here, very much alive some 24 years later. It wasn't magic James could explain, but it was magic he was grateful for. It felt like a second chance, and he wasn't going to squander it being weepy and weird the whole time.
"I know, I saw it too," he admitted. He reached his hand up to wipe her tears away with his thumb. "I almost punched him, so I don't blame you." He hesitated for a moment then, not entirely sure what to say. He couldn't believe it was Harry either. Harry who was older than them.
"I don't know what's going on, but as long as we're together and we get the chance to know him... I'm okay with it," he decided eventually.