I have no idea what realization came to Anthony during this scene.
From Protector of the Grey House:
Anthony nodded. “I’ll see what I can do.” He looked to Vincent for a long time. Finally, Anthony asked, “What have you decided about Natalia?”
Vincent took another deep breath and let out a sigh. He then reached into his pocket and pulled out his remote. He turned off the cameras and looked to Anthony. “I need you to continue being suspicious of her.”
His face exploded in confusion. “Why?”
“I don’t want to worry about her motivations.”
Anthony frowned but slowly, realization dawned on his face. Before he could speak, Vincent raised a hand to silence him.
“Keep your thoughts to yourself. Continue to monitor her actions.”
Anthony nodded. “Are we done then?”
Vincent stood, as did Anthony. They shook hands, then Anthony left the room and the house. Vincent sat back down in his chair and stared towards the window as he thought of Natalia and the past few days. He replayed all the information Anthony found out a few times before he reached for the intercom. He buzzed the security room.