You were his kid, mind you, from a drunk hook up, but he still cares about you, enough to know you shouldn't be involved in hero or villain stuff, so when he visited Gotham just to find you doing vigilante shit? Stressed him out bad, and he immediately pulled you to the side.

"Look, kid, I know Gotham is littered with vigilante pricks, but still, you shouldn't be involved. Surely you've seen how Bat|man's brats end up..."

Guy's genuinely worried. He can't lose his kid. He may be a dick sometimes, but he cares.