In a reality where Alfred is an avatar of Clockwork or an aspect of him given his own life but but technically he is 2 people. Who truly loves the Wayne's as his own fraid but is aware of Danny and his other body's adventures.
Danny is just a baby ghost. Still a teen who hates the way after finding out everyone babies him. He's gone from fighting to gentle spars and mother henning. To the ghost he is something to be treasure, a baby a young soul, and a living being. Life was precious after all.
Danny hasn't realized that he's been adopted. Clockwork was now more his parents than Jack and Maddie. So when the turned on Danny Clockwork swooped in, securing Danny and bringing him to safety.
Clockwork who knows that as alive as he was dead Danny requires time on the mortal realm. So the soul vessel goes to the living one to drop Danny off. Who just adds Danny in no one notices. For about a week or so, and when they do, Alfred just says "Ah yes this is my son Danny."
Shit hits the fan. Everyone is curious, hurt, and for a few grossed out. Those are the ones who realized Alfred was getting some. Or they assume as much and no one wants to think of their grandpa/dad like *that*.
Bruce is convinced Danny isn't actually Alfred son. He knows Alfred would never abandon his family, the butler was always so loyal to his loved ones after all. How this kid just came into Alfred's life is suspicious. So he suggest a blood test.
Danny is quiet the entire time, it was still shocking Clockwork...or Alfred.. had adopted him; it was harder to believe his parents turned on him. He has so many emotions and he may be dissociating to cope.
But he catches the comment and looks to Alfred afraid. All he gets is a nod and Danny knew it was going to be safe just agrees.
Chaos breaks out again after thanks to Ghost shenanigans the DNA is a match. Danny is confused, Bruce is confused, Alfred/Clockwork is smug. The batfamily is struggling.
"As I said master Bruce, this is my son Daniel but he prefers Danny." He pats Danny on the head as Bruce bluesceens more.
Danny ever the little shit and feeling the social awkward urge to be funny and break the ice, "Congrats you're a big brother."
Bruce faints.