Montague didn't know exactly how to handle the whole situation. Nathaniel was an amazing little child (and very much alert), he could already tell- he could already feel a pull to the boy (but then he'd always loved kids, no matter the age). The fact that this would soon be a blood bound godchild did not help his flare of affection. However, what really got to him was watching Verity and Marlowe, he knew that he was staring at his wife softly. He would never, ever, want to replace Marlowe- but... a child of their own.... And she held Nathaniel so naturally...
At Marlowe's comment Montague chuckled very quietly, his attention averted to his son. "No, not yet. He's much to small, he can't even sit up on his own yet. But he will grow fairly quickly," Montague gave a small smile glancing at Theo before turning back to Marlowe. "He'll be walking and able to play with you before you know it." That had been what it'd seemed like with Lucy anyway.