Because another funeral would remind him about Charlotte when he'd rather forget? Theo didn't say that though, there was no need to remind his wife of that. "Because we know how the Vaiseys feel about them, and they're usually political allies," he said instead, pondering the situation. He was fairly certain there was a celebration tonight at Vaisey Manor.
Taking a sip of his tea he looked through the window, then sighed. "But no, you're right, of course we need to attend." It would not do to annoy Potter at the moment. Or the Aurors who were supposed to report to him from Hogwarts.