Don saw the look that Guilian gave him, and his memory flashed back dozens of years. He remembered standing up to his own father in such a way, only this time he knew his youngest son was in more trouble than he could handle.
He'd seemed genuinely surprised at Verity's condition, and he tried to appeal to Guilian's inherent nature. "That's right, twin girls. Can you believe it? I know she'd love to see you. I know it can't be easy on her. Your mother... she's not necessarily making it easier on her."
"And your sister is really missing you." In truth, if this was the Guilian they all saw, they would be shocked and stunned. But Don was certain after a few weeks of being away from the undesirable influences, he would return to himself.
There were words of finality in what Guilian said, and Don's ire was raised. "If that's what you truly want, Guiliano, then that is what you will have." Standing, he gave one final look to the man who still sat defiantly before him.
"Until such time as you come to your senses, you are no longer welcome on any Montague property." He stopped short of disinheriting him. Although had this been Damian before him (not that he had the balls to stand up to him in such a manly way), he would have not hesitated. "I wash my hands of you, Guiliano, and may God and Merlin have mercy on you."
With that he turned and walked away. Don wasn't quitting, merely cutting ties on a bad investment. And when bad investments were concerned, there was no room for sentimentality. Even if his heart was breaking, he kept his stoic demeanour as he walked out of the Casino, not looking back until he'd portkeyed back to Verona.