Joshua accompanied Aria and Noah to fetch Oliver with them, although Joshua was dying in anxiety. He wanted to make sure that Ivy was safe and given a chance, he would have driven over to the cemetery like a maniac. Until he saw Ivy himself, he was unable to stay still.
The previous time when Aria and Ivy had taken Oliver to the cemetery, Noah had not accompanied them as Aria was still furious at him. And Joshua had decided not to tag along as he did not want to disrupt the family's peaceful time. They needed to be alone and the three men had given them the space. This was the reason why neither Noah nor Joshua knew about King's Street.
