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Probability of Accidental Guardianship

Summary:

Tim Drake is not being adopted.

This is an important distinction, because adoption implies paperwork, consent, and a series of responsible adult decisions. None of those things have occurred. What has occurred is that Tim keeps showing up, and Bruce Wayne—international playboy, billionaire, and allegedly competent adult—has, on multiple occasions, failed to remove him.

This is not the same thing.

Tim has a chart about this.

The chart is labeled “Probability of Accidental Guardianship via Repeated Exposure.” It has trend lines. The trend lines are concerning.

Notes:

so i didn't mean to take a hiatus, but then I looked at a wall for three months and forgot how words worked. but then I remembered Tim Drake exists and my productivity returned like a Victorian ghost seeking vengeance. so here. have some domestic bat-chaos.

many thanks to lauren for the beta!

(See the end of the work for more notes.)

Work Text:

Tim Drake is not being adopted.

This is an important distinction, because adoption implies paperwork, consent, and a series of responsible adult decisions. None of those things have occurred. What has occurred is that Tim keeps showing up, and Bruce Wayne—international playboy, billionaire, and allegedly competent adult—has, on multiple occasions, failed to remove him.

This is not the same thing.

Tim has a chart about this.

The chart is labeled “Probability of Accidental Guardianship via Repeated Exposure.” It has trend lines. The trend lines are concerning.

***

“Why are you here?”

Tim doesn’t even look up. He’s a small, cross-legged island in the middle of the Batcave floor, currently drowning in three different case files, a discarded sandwich crust, and one of Bruce’s private datapads.

“Working,” Tim says, his voice flat with focus.

“That is my line,” Bruce says, each word dropping like a heavy stone. “And you are eight.”

“Nine in March.”

“That is still not a qualification.”

Tim just hums, his fingers flying across the screen. “You missed a connection between the docks and the Narrows incidents.”

Bruce freezes. It’s barely a flicker—a half-second of stillness—but it’s there. “No, I didn’t.”

Tim swivels the screen around. “You did. It’s subtle. They’re staggering the shipments every thirty-six hours instead of twenty-four. It’s a clever way to dodge pattern detection if you’re only looking at daily cycles. You were looking for a rhythm that wasn't there.”

Bruce stares at the screen. Then he looks at Tim. Then back at the screen. The silence stretches, filled only by the low hum of the cooling fans.

“…How did you get in here?”

“The usual way.”

“There is no usual way.”

Tim gestures vaguely toward the ceiling. “The big entrance.”

“The hidden entrance,” Bruce corrects.

“Right,” Tim agrees easily. “It was hidden. I found it.”

Bruce presses two fingers to his temple, feeling a headache begin to throb in real-time. “You cannot just find the Batcave.”

Tim actually takes a second to think about that. “I can,” he says, shrugs, and turns back to the data. “I mean, I'm here. Empirically speaking.”

From the shadows, Alfred Pennyworth clears his throat. It is a dry, precise sound—the sound of a man who has been holding an "I told you so" in reserve for hours.

“I did mention, sir, that the cave’s security might benefit from accounting for particularly determined children,” Alfred says smoothly.

“I am not redesigning the entire security system because of one child,” Bruce snaps.

“You are absolutely redesigning it because of me,” Tim says, not even bothering to look up this time.

Bruce points a finger at him, the full Weight of the Bat behind it. “You. Out.”

Tim finally meets his eyes. He doesn't look scared; he looks busy. “I’m in the middle of something.”

“You are in the middle of my something.”

Tim tilts his head, a small, challenging movement. “Do you want it solved or not?”

Bruce opens his mouth to argue. He closes it. He opens it again, the internal struggle playing out across his jawline.

“…Explain the connection,” he finally mutters.

Tim smiles—a tiny, sharp thing, like he’s just won a game Bruce didn't even know they were playing.

***

This is how it keeps happening.

Not in big moments.

In small ones.

Tiny concessions that Bruce tells himself are temporary.

***

It starts with the chair.

Bruce tells himself it’s a matter of ergonomics, not an invitation. The boy is sitting on a cold stone floor, and the dampness of the cave isn't good for a child’s lungs. So, he brings over a rolling chair—one of the spares from the med-bay.

"Sit," Bruce commands.

Tim doesn't even say thank you. He just climbs into it, his sneakers dangling six inches off the edge of the seat, and rolls himself right back into the glow of the monitors. He looks like a bird perched on a branch that’s far too big for him.

Then comes the caffeine.

"Absolutely not," Bruce says, swatting Tim’s hand away from a lukewarm mug of black coffee. "You are eight. Your heart would explode."

"Nine in March," Tim reminds him, not missing a beat as he highlights a suspicious shell company on the screen. "And I’ve been up since four a.m. watching the Falcone warehouse. My cognitive function is dropping."

Bruce sighs, a sound of pure, concentrated defeat. He glances at Alfred, who is standing by the elevator with a tray. There is a single glass of apple juice on it.

"The juice, Master Timothy," Alfred says, his voice a dry desert wind. "And a granola bar. If you are to dismantle Gotham’s criminal underworld, I suggest you do it with a stable blood sugar level."

Tim grumbles but eats. He chews with the mechanical efficiency of someone who views food as necessary fuel rather than a pleasure. He doesn't leave. Bruce doesn't make him leave.

The "temporary" concession of the night becomes the permanent fixture of the week. Bruce finds himself adjusting the height of the secondary monitors so Tim doesn't have to crane his neck. He finds himself "accidentally" leaving the encrypted files open on the mainframe so he doesn't have to watch the boy spend twenty minutes bypass-coding them anyway.

It’s the silence that's the most dangerous. In the quiet of the cave, with only the sound of two sets of fingers tapping on keys, it feels... natural. It feels like a partnership Bruce never asked for and doesn't know how to dismantle.

"Bruce," Tim says, his voice small but steady in the cavernous space.

"What?"

"The shipments aren't going to the Narrows." Tim points to a grainy CCTV still. "Look at the suspension on the truck. It’s too heavy for just electronics. They’re hauling something dense. Lead lining, maybe."

Bruce leans over, his shoulder nearly touching the boy’s small frame. He looks at the pixels, then at the kid's logic, and feels the terrifying realization that he isn't just letting a child stay in his cave.

He’s starting to rely on him.

"Go home, Tim," Bruce says, but there’s no steel in it. It’s a suggestion, not an order.

"In a minute," Tim mumbles, already opening a new window. "I just need to cross-reference the manifests."

Bruce stays. He tells himself he’s just supervising. He tells himself that tomorrow, he’ll change the codes and lock the "big entrance."

But as the clock ticks toward three a.m., he knows he’s lying. The Ghost of Batman is being haunted by a boy in a rolling chair, and Bruce is letting it happen, one tiny, silent "yes" at a time.

***

“Did you finish your homework?”

The click-clack of the keyboard stops instantly. It’s a heavy, loaded silence. Tim doesn't move at first, then he slowly swivels the massive Batcomputer chair around to face the dark.

“...I’m sorry,” Tim says, his voice laced with genuine concern. “Who are you, and what have you done with the Batman?”

Bruce, currently wearing a sweater that looks far too domestic for the damp cave walls, doesn't even blink. “Your homework, Tim.”

Tim squint-frowns. “I was in the middle of analyzing the shell company’s—”

“Homework.”

“I already did the math portion. It took ten minutes.”

“English.”

“You don’t actually respect the English language,” Tim says, his tone shifting to something remarkably matter-of-fact. “I’ve seen your mission reports. They’re ninety percent fragments and grunts.”

A sharp snort echoes from the shadows above. “Oh, I like this one.”

Tim cranes his neck. “Oh. Hi.”

Dick Grayson is perched on the overhead railing, looking like gravity is more of a polite suggestion than a law. He grins down at them, teeth white against the gloom. “Hey there, Baby Bird.”

“I’m not a baby bird,” Tim corrects, turning back to the monitors without missing a beat. “I am a fully integrated tactical observer.”

“Even worse,” Dick says cheerfully, dropping from the railing and sticking the landing with a silent flourish. “We're unionizing. B, you’re losing the locker room.”

“I am not—” Bruce starts, his brow furrowing.

“You asked him about his homework,” Dick cuts in, sounding absolutely delighted. “That’s a slippery slope, Bruce. That’s domestic. That’s dangerous. Next thing you know, you’re standing in the kitchen at six a.m. packing crustless sandwiches into a themed lunchbox.”

“I am not packing lunches,” Bruce says, though he sounds less certain than he did five seconds ago.

“You will,” Tim says with the cold, hard confidence of a seasoned actuary. “Statistically, the trajectory of this dynamic leads to shared meal prep within three to five months.”

Bruce stares at both of them. He looks like a man realizing he is being flanked by two very different, yet equally exhausting, tactical geniuses.

“Homework,” Bruce repeats, clinging to the one shred of authority he has left.

Tim narrows his eyes, entering full negotiation mode. “Can I do it here? At the desk?”

“No.”

“The ambient noise of the cooling fans helps my focus.”

“No.”

“I’m a flight risk,” Tim tries, leaning back. “I require constant adult supervision.”

“You absolutely do not,” Bruce growls.

Dick leans over, stage-whispering loudly into Tim’s ear, “He’s wavering. Push for a snack.”

“I am not negotiating with a eight-year-old!” Bruce’s voice rises just an octave.

“Nine in March,” Tim says automatically, already sliding out of the chair with a theatrical sigh of defeat. “Fine. I’m going. But I’m taking the Falcone case file with me.”

“You are absolutely not taking an active organized crime file to your bedroom.”

“I need a reward system to maintain my productivity,” Tim calls over his shoulder, already halfway to the stairs. “Think of it as a carrot on a stick!”

“Tim, put the folder—!”

“I’ll be back in forty-five minutes!” the boy shouts, the sound of his sneakers hitting the stone steps fading into the upper levels.

Bruce stands there for a long moment, staring at the empty stairs. Then, very slowly, he turns to Dick.

“This is your fault.”

Dick holds up his hands, palms out, wearing a grin that is entirely too wide. “Hey, don’t look at me. I’ve been here for five minutes.”

“You encouraged him.”

“I encouraged the chaos,” Dick corrects, clapping Bruce on the shoulder as he heads toward the elevator. “The kid was already chaos, Bruce. You’re just the one who gave him a chair.”

***

It gets worse.

***

“Where did you get that?”

Tim looks down at his chest, then back up, the picture of wide-eyed innocence. “This?”

He’s wearing a black hoodie. But it isn't just a hoodie. It’s a very specific, matte-finish black garment with subtle, reinforced stitching across the shoulders and what is—actually, it’s not subtle at all—clearly visible light-grade armor plating woven into the torso.

“That is not a normal hoodie,” Bruce says, his voice dropping into that dangerous, low register he usually saves for interrogating mid-level mobsters.

“I know,” Tim says, completely unfazed. “It’s significantly better.”

Bruce closes his eyes for a long, weary second. “Where, Tim?”

Tim hesitates, his fingers nervously picking at a reinforced cuff.

Dick leans in, looking like he’s watching the championship finals of a sport he deeply loves. “Oh, I definitely want to hear this.”

“...It was in a drawer,” Tim finally admits.

“In my cave?”

“Yes.”

“In my specialized equipment storage?”

“It wasn't labeled,” Tim says, his voice rising in defensive indignance. “Honestly, Bruce, that’s on you. Proper inventory management is the first line of security.”

“It is not on me.”

“It could have been a trap,” Tim adds, warming up to his own logic. “I had to test it. You know, for safety. To make sure the cave was still secure.”

Bruce makes a sound in the back of his throat—a strangled noise that has no place in the human lexicon. “You tested—how exactly did you test it?”

Tim brightens immediately. “Falling.”

Bruce looks like he’s about to have an aneurysm. Dick, meanwhile, is fully doubled over, clutching his knees as he wheezes for air. “You let him near your spare gear? B, at this point, this isn't even a security breach. This is just bad parenting.”

“I did not let him—”

Tim raises a hand, cutting Bruce off with the calm authority of a legal mediator. “In fairness, you didn't exactly stop me.”

“I was not aware you were doing it!”

“Situational awareness is a vital part of the job, Bruce,” Tim says, echoing Bruce’s own training lectures with terrifying precision.

Bruce slowly tilts his head back to stare at the damp, dark ceiling of the cave.

“This is how it ends,” he mutters to the bats. “Not in a grand battle. Not in a blaze of glory. But because a nine-year-old outmaneuvered my filing system.”

Alfred, passing through the background with a tray of empty tea service, doesn't even break his stride.

“A tragic but not entirely unexpected conclusion, sir,” the butler remarks. “I shall prepare the guest room for the hoodie’s new permanent resident.”

***

Later, when Tim is half-asleep on the couch—because he did not mean to fall asleep, he was just "resting his eyes" while waiting for a localized scan to finish—Bruce stands over him for a long, silent moment.

Dick watches the scene from the shadows of the stairs, leaning against the railing with a look of pure, unadulterated smugness.

“...You’re tucking him in,” Dick says softly, his voice carrying the hushed, reverent tone of a wildlife narrator witnessing a rare species in the wild.

“I am not tucking him in,” Bruce says, his voice a low, gravelly rumble that carries absolutely no conviction.

“You are absolutely tucking him in. You’ve got the 'dad-lean' going and everything.”

Bruce picks up a heavy wool blanket from the end of the sofa. “I am preventing hypothermia. The Cave’s climate control is optimized for server health, not human metabolism.”

“He’s indoors, Bruce. In a manor. With central heating.”

“It’s a drafty manor.”

Dick’s grin widens. “You’re adjusting the corners. Look at you. You’re tucking.”

Bruce pointedly adjusts the blanket, smoothing out a wrinkle over Tim’s shoulder with unnecessary precision. Tim makes a small, muffled noise in his sleep, shifting instinctively toward the warmth of the wool.

Bruce stills. He freezes for exactly one second, hand hovering in mid-air, before very carefully—almost surgically—ensuring the edge of the blanket is tucked under Tim’s chin.

Dick’s grin softens, the teasing edge fading into something a bit more nostalgic. “...Yeah,” he says, his voice barely a whisper. “That tracks.”

Bruce exhales, a long, resigned sound that seems to echo off the stone walls. “This is temporary,” he says, though it sounds more like a mantra than a fact. “As soon as the case is closed, he goes back to his normal routine.”

Dick doesn’t answer. Because they both know it really, really isn't.

***

Bruce stands there for a long time, just watching the steady rise and fall of the boy’s shoulders under the heavy wool.

“This is temporary,” Bruce says, his voice barely a breath. It’s a reminder for himself, a way to keep the walls up.

Dick doesn’t answer. He just looks at Tim, then at Bruce, and finally back at the stairs. He’s seen this movie before, and he knows how it ends.

Because the thing is, Tim Drake isn’t being adopted. Adoption is a choice—a series of meetings, signatures, and deliberate adult decisions. None of that is happening here. What’s happening is a slow, quiet surrender. Tim keeps showing up, and Bruce, for all his contingency plans and world-class willpower, has simply stopped finding reasons to send him away.

It isn’t a family yet. It’s just a child who won’t leave and a man who has forgotten how to say no.

Tim, for his part, has already done the math. Somewhere in his backpack, tucked between a stolen Batarang and a half-finished English essay, is a folded piece of graph paper. It’s covered in meticulous, tiny handwriting under the heading: “Probability of Accidental Guardianship.” It has trend lines. It has a scatter plot tracking Bruce’s "softening" over the last three weeks. The data is cold and undeniable.

And according to Tim’s latest mental update, the "Strategic Application of the Wool Blanket" has officially pushed the project into the Inevitable. Bruce doesn’t realize he’s been outmaneuvered, but the graph doesn’t lie.

He’s about three glasses of milk away from a total loss of sovereignty.

Tim shifts under the blanket, his nose wrinkling against the smell of old wool and Batcave dampness, and for the first time in a long time, he doesn't look like a supplementary asset. He just looks like a kid who finally found where he was supposed to be.

 

Notes:

No thoughts, just Tim Drake in an oversized armored hoodie. See you in the comments (if I haven't been reclaimed by the void by then).