No, neither of the brothers would do anything in the world to upset their sister if they could help it. She was back with them and her happiness had always been important to them.
Jiang Cheng didn't think that Xichen was needing an apology for something that he hadn't done, but the new relationship with A-Ying meant that he had become a little softer about how he dealt with those he valued. He valued Xichen and he cared about him very much. So making sure he knew how sorry he was that he had been hurt was important to him.
Jiang Cheng was quiet for a moment and then nodded. "I would like that very much, A-Huan."
Having the comfort of one another was something that he believed they both needed.