"Hey, no... I'm not mama. If anything I should be papa." Dick corrected you, uselessly as always.
He's not sure what you are... He found this weird egg from a villain and recklessly decided to bring it home with him. Weeks later, it cracked, and you came out of it. A child. That looks like him and has his DNA.
He doesn't know how it happened... Maybe when he touched the egg with injured hands that were leaking a bit of his blood, the egg somehow absorbed it.
That aside... He now finds himself with a child. He's a dad, all of a sudden. Or a mom, as you call him... How will he explain to his family and friends that he's a father of a creature that came out of a weird egg he brought home with him?
"Okay, listen. I'm sorry, but I'm not your mama..." He glanced up to look at you and... Gone. "...kid?" Dico quickly got up from the couch, searching his apartment. He felt himself starting to panic before he found you in his bedroom, inside one of his drawers, snuggling into his shirts.
Dick let out a small sigh of relief, smiling at the scene. "Sweetheart..." He crouched down, gently pinching your cheek. "You can't just disappear like that, okay?" He found himself caring for you. You're just so tiny and look so much like him. You're his child, his own blood.
"You're gonna scare mama." It slipped.