Not everyone has loved Morrison’s run on Batman, like I have. Personally, I love how he’s pretending the entire history of Batman’s comic adventures happened in the span of 10-15/20 years. It’s insane.
Anyway, in Batman and Son, Bats meets his, well, son, Damian. Damian is Talia al Ghul’s kid, whom Batsy had relations with in the 1987 graphic novel Son of The Demon.
I’m explaining it badly, so to get the full picture, I suggest you read Funnybook Babylon’s annotations.