Antonin just smiled, in no rush to divulge the secret. He might have trusted Augustus enough to partner with him to use his home as a safe house, but that didn't mean he was going to keep him informed about their future moves. It would be to dangerous for even an ally to know. He wouldn't risk it, not even as a gesture to show that he trusted Augustus. To his credit, the other wizard wasn't offended. He'd been a Death Eater long enough to understand how it all worked.