Bruce Wayne is Danny Fenton's Bio dad but I'm getting sick of comically evil parents so Maddie and Jack had a 3sum with Bruce way-back-when and she never ACTUALLY got a paternity check (they forgot/it didn't matter) but then Jazz gets into knowing her bloodline and family history and does a 23andMe test and then it comes back that her and Danny are only half siblings and they're like "omfg…. did mom cheat on dad??? ….. ITS NOT VLAD IS IT??? OH NO. OH NO" and then Maddie and Jack see it and they're like "oh! lol! that's probably Brucie :)" and then they're like "wouldn't it be nice for you to meet your bio dad? he's such a fun guy. He's funded some of our projects <3" and then they send Danny to live with Bruce for the Summer
cue Batfam shenanigans of everyone trying to keep identities a secret
(This is endgame Maddie/Jack/Vlad)
It's drizzling out. Danny's hair is still a little damp from the short trip from Jazz’s car to the front door. She hasn't even attacked him with a towel yet, insisting he'd catch a cold. Instead she had been too preoccupied with the pile of mail on the kitchen table. She'd screeched and dove for it, shuffling through the letters before pulling out one, large and thick, and ripping into it immediately.
Danny pulls out a piece of bread and slathers butter on it. He jumps on the counter and folds the bread in half and shoves it in his mouth.
Jazz stares down at the packet in her hands, face almost unreadable. “Huh.” She says.
The envelope on the table reads Ancestry.com.
Hi sorry do you mind if I just-
-
Maddie doesn't notice a thing, doesn't see the looks on her kids' faces. "Sure thing, dear, what is...?" she starts to ask, then trails off as she scans the page. She frowns.
The tension that had been sitting in Danny's stomach like a lead weight finally snaps. He stands, his chair screeching behind him, and says, "Mom, Dad-" not even knowing what he means to say, just knowing he needs to stop this, now.
Jack interrupts him. "That can't be right, can it Mads?" he asks, a strange solemness to his tone, his eyebrows drawn together.
Danny has a sudden, desperate, selfish wish that they weren't doing this in front of him. He doesn't want to see his family get torn apart, doesn't want his own existence to be the thing that ruins them. He's feared for that eventually ever since the day he walked into the ghost portal, but he never thought it would happen like this.
Maddie puts a hand up to her mouth. "No, it couldn't be," she mutters against her fingers.
"Danno was born in February," Jack points out, seemingly out of nowhere.
"Right," Maddie agrees. "So-" suddenly, her eyes spark in recognition. Danny's breath catches to see it. "Oh my goodness, Jack, Brucie!"
Danny's gaze snaps to his father, who... brightens? "Brucie!" he says jovially. "That'd explain it!"
Alfred wasn’t surprised that his pseudo son had inherited his parent’s romantic preferences, preferences Alfred knew better than anyone.
Alfred was surprised by Master Bruce’s choice in partners. Partners who apparently had a child and had recently discovered that their son was not Mr. Fenton’s biological child.
At least the Fenton’s had the decency to inform Master Bruce once they discovered the … mix up, unlike Miss Al Ghul, whom just showed up at his doorstep with a ten year old.
Master Bruce had such… eclectic choices in romantic parents. At least the Fenton’s weren’t villains or heroes, though they definitely were some flavor of mad scientist.
But who was he to judge. His own paramours were not people one could call … conventional.
Master Bruce must have inherited that trait from himself.
Nevertheless, Alfred now had a new mission to focus on.
The mansion was to have guests soon and he needed to inform Master Bruce his brood had expanded while he was away.
Alfred has set up three rooms, one too many he thinks, but one can never be certain, goes down to the bat cave, with a fresh batch of pastry goods, waits, seated, for Master wayne and brood to return.
The screech of the batmobile can be heard.
"Bruce, we need to talk, young sirs and young ladies, please, leave us, post haste, take a pastry with you" Alfred speaks before anyone can get a word in.
All of Bruce's brood, take their preferred pastry, and leave Bruce in the thick of it.
"Alfred, what is it, it sounds serious" Bruce asked taking his cowl off.
"Remember Madeline and Jackson Fenton's,"
"Well, uh, I do"
"Their son Daniel Fenton, who has a birthday in February has no relation to Jack Fenton"
Bruce squints his eyes in deep thought, "ok and you bring this up why?"
Alfred, looking disappointed, world's greatest detective, his ass "9 months before, you and the couple, were in a intimate relationship no"
Bruce, gears turning, but he doesn't want them to turn "I have another kid, Alfred, request them to come visit please"
Alfred sighing "already on it master Bruce, should I tell Madeline and Jackson your room is open, or no"
Bruce walks away.
Alfred "duly noted sir, they will be here with young master Daniel, and young lady Jasmine in a week from now"
Bruce sighs "you already made plans, thanks Alfred"
---
The ghosts of Martha and Thomas, who are watching over their third.
"we have another grandson and granddaughter. Yay"
"but did it have to be with the ghost hunters, they nearly caught you in that box, I just barely got you out of it"
"who knows, maybe they don't hunt ghosts anymore"
"the Fenton's not hunting ghosts as if"
In what felt like no time at all the Ghost Assault Vehicle was packed with their weekend bags and the Fenton Family was barreling down the highway toward Gotham.
