Justin was full of confidence, as he had gotten used to being haughty.
Although he was the son-in-law of the Turners, he had a higher status. When the Carters were still a second-tier family in Orange County, Justin disliked William because they all knew that William wasn't the biological son of Dominic Carter and didn't have a high status in the Carter family. He couldn't get any money from the Carters, and his status was just for show.
But Justin was different. The Herons were a second-tier family in LA and were much richer than the Carters. Furthermore, he was the biological son of Robert Heron and would be taking over the family's empire in the future. So he completely looked down on William, who couldn't even get a proper job and could only live off of the annual dividends from the Carters, which were like handouts.