You fight because of Chenle's jealousy. Sometimes his jealousy drove you crazy, now was one of those moments, you are having a big fight.

"For God's sake, now I understand why your father doesn't love you, pray that I love you!"

This sentence was enough to make you shocked and sad. This was the first time you heard something like this from him. He realizes what he said with his sudden anger, Chenle looks at you with regretful and surprised eyes. Even he couldn't believe he said that.