"How absurd it is, that we're envious of a dead child holding our father's affection"
"You think you're so special just because you're the blood son, but guess what, brat." Drake hissed
"No matter what you and I do, he'll never bat an eye, because he and will always have eyes only for Jason."
"Who's Jason?"
If you go to Bruce's study, go find a book with a picture of a boy with black hair and teal eyes, placed as a bookmark in it, and there you'll get your answer.
Prompt idea : AU (Jason never came back from the dead and Bruce struggles with his grief and guilt, making his kid's thinking he only has eyes for Jason.