By the time they reached the East Wing, Kendis was starting to regret every life choice that had led to owning a house large enough to require stamina.

Not because she hated showing it off.

She loved the Concord House. She loved the warm wood under her boots, the old-world trim, the glass and light and impossible rooms, the way Tony kept looking at things like he was proud and terrified of what they had built in equal measure. She loved watching Molly Weasley discover storage. She loved watching Arthur Weasley try very hard not to touch anything too aggressively. She loved that Rhodey had quietly accepted the house as sentient nonsense and moved on to judging Tony’s design priorities.

But they had been walking for ages and she was tired.

Kendis was a mechanic, and she was used to spending ten hours on her feet in a garage without complaint. Somehow, touring her own house with twenty-five people, three bots, and one dog had made her feel like she was leading a diplomatic expedition through a small nation-state with intimacy issues.

Tony, naturally, looked fine and she hated him a little for that.

He caught her side-eye and smiled. “You doing okay, Lady Blackmere?”

“I am one hallway away from making everyone sit on the floor and fend for themselves.”

“That’s hostess talk for thriving.”

“That’s hostess talk for murder.”

The sconces along the East Wing hallway brightened as if entertained.

Kendis looked up. “Do not encourage him.”

The lights flickered once.

Tony spread his hands. “House likes me.”

“The house has Stockholm syndrome.”

Behind them, Ron whispered, “Can a house have that?”

Hermione whispered back, “I think in this case, the ethical framework is complicated.”

Miss Parker said, “It’s a Stark property; complicated ethics are load-bearing.”

Pepper made a sound that might have been agreement and might have been exhaustion.

The East Wing guest hallway stretched ahead of them in warm, elegant order. Dark wood doors lined one side, each with ornate brass nameplates. The walls were soft tan above paneled wainscoting, trimmed in dark wood, with a long pale runner drawing the eye forward. Warm sconces glowed between framed photographs of their people: Tony and Rhodey laughing too hard at something; Pepper looking like she had won an argument before it began; Happy with a resigned expression beside a blurred Dum-E; Kendis with Alke; the Weasleys gathered in impossible warmth; Wei Ying making a face while Lan Zhan pretended not to adore him; Dom, Mia, Brian, and Letty standing close like a family that understood engines and loyalty.

Kendis had not remembered choosing half those photos.

Which meant the house had.

Of course it had.

She stopped beside the nearest door, where the brass plate read: Wei Ying & Lan Zhan

Miss Parker leaned in. “The house labels rooms?”

“For guests who become permanent problems,” Kendis said.

Jarod smiled. “That sounds like most of us.”

“It is absolutely most of you.”

Tony gestured down the hall. “Guest rooms. Each one adapts. Bed size, accessibility, climate, privacy preferences, soundproofing, wardrobe storage, and emotional coping mechanisms.”

Ron blinked. “The guest rooms have emotional coping mechanisms?”

Kendis nodded. “Some people need blackout curtains. Some need tea. Some need a locked door and a weighted blanket. Some need a room that does not smell like anyone else has ever been there.”

Jude’s expression softened behind her. Kendis did not turn to look directly at them because she already knew they understood.

Molly ran her fingers lightly over one of the frames on the wall. “You made rooms for everyone.”

Kendis almost said the house did, but the correction caught in her throat.

Because yes, the house had done its usual impossible nonsense. But she and Tony had wanted this too. Maybe not at this scale. Maybe not with a hallway that could stretch itself when more people needed somewhere safe to sleep. But the desire had been there before the architecture had answered it.

“We made room,” Kendis said at last. “The house got dramatic about it.”

The hallway lights warmed.

Tony’s shoulder brushed hers.

For a moment, it was quiet enough that Kendis thought the tour might end there, with everyone politely emotional in the guest hallway.

Then Butterfingers bumped into a side table.

A framed photo wobbled.

Happy lunged.

Tony barked, “Butterfingers.”

Butterfingers froze with the exact guilty stillness of a machine that knew it had committed a social crime.

Kendis sighed. “This is why we cannot have nice hallways.”

The house, traitorous and indulgent, shifted the side table three inches farther away from the bot.

Tony pointed at the wall. “Do not enable him.”

The wall did nothing.

Kendis had just opened her mouth to move everyone along when she noticed the end of the hallway was wrong.

There should have been a window there. A tall one, black-framed, looking over the side garden. She knew because she had stood there with Tony a week ago while arguing over whether the East Wing needed more seating. She had won that argument, and there had definitely been a window.

There was no window now, but a door.

Not one of the warm wood guest doors with brass plates. This one was tall, oval-edged, and backlit with a gold so deep it almost looked liquid. Runes burned around the frame in a slow circular crawl, not English, not Latin, not anything Kendis wanted to identify in front of people who were not cleared for all of her nightmares.

Her stomach dropped.

Tony went still beside her.

“Kendis,” he said quietly.

“I see it.”

Behind them, the chatter died.

Pepper’s voice sharpened. “That wasn’t there before.”

“No,” Kendis said.

Hermione had gone very still and Kendis could almost feel her attention like a blade. “Those runes—”

“Later,” Kendis said, a little too fast.

Hermione shut her mouth, but her eyes did not stop working.

The house hummed.

Not like when it was pleased.

This was different. Lower. Older.

The glowing door opened on its own.

Gold light spilled across the runner.

Ron swore softly.

Arthur whispered, “Oh, my.”

Kendis did not move for a heartbeat. She was used to impossible things. She was used to doors appearing where they shouldn’t, to magic folding distance, to the Concord House making choices like a being with both affection and audacity. But she knew the shape of most of the house’s tricks by now.

This was new.

Tony looked at her, and she could see the calculation behind his eyes: threat assessments, structural scans, radiation, scanning energy signatures, and exit routes. Kendis knew him well enough to know that he would put himself between her and whatever came next without hesitation.

“All right,” Kendis said, mostly to the house. “Show us.”

She stepped through.

The air changed.

The group followed her into a vast circular chamber that should not have fit inside the East Wing, inside the house, or possibly inside ordinary geometry. The Rotunda rose around them in dark stone and bronze-gold light, a grand circular room lined with oval doors, each door glowing around its frame like an ember. Some were labeled with cities: London, Milan, Scotland, New Orleans, Boston, and Houston, while the others were blank as if they were waiting for instruction.

Runes crawled in bands along the walls and ceiling, gold against dark stone, and the polished black floor reflected everything in rings of light.

At the center, leather chairs circled a low round table set with tea, cups, biscuits, and a book Kendis was almost certain had not existed five minutes ago.

Because apparently, when the house unveiled a magical transportation hub, it still believed in hospitality.

Kendis stood there in stunned silence, but it was Tony who broke first.

“Nope,” he said. “No! Absolutely not! We are not discovering a surprise portal room during a housewarming party.”

The Rotunda lights pulsed.

“Do not pulse at me,” Tony snapped. “You are architecture.”

The lights pulsed again.

Kendis heard Wei Ying make a delighted little sound behind her.

“No,” she said immediately.

“I said nothing.”

“You breathed like a man about to become a problem.”

Lan Zhan said, “He was.”

Wei Ying looked betrayed. “Lan Zhan.”

Hermione had taken three steps forward, eyes wide and furious with wonder. “This is a stable transit chamber.”

Kendis exhaled slowly. “Looks like.” The implications rolled through her brain like a dropped scroll. She did not know how to feel. Shocked? Most definitely, because the last thing she had expected was a magical transit hub in her house. Happy? Relieved, because she could visit her friends more often and Kendis now had an evacuation point. But also bewildered and not a little bit annoyed.

“Interdimensional?”

“Some of them.”

“International?”

“Yes.”

“Private network?”

“Apparently.”

Tony turned to her. “Apparently?”

Kendis gave him a look. “Do I look like I installed the surprise magic airport, Anthony?”

Rhodey stared at the doors. “Magic airport.”

Happy pointed at the labels. “Why does Boston get a door?”

Miss Parker, who had been quiet too long, looked at the center table. “Because the house has taste in crime.”

Jarod smiled. “That’s generous.”

“Don’t make me take it back.”

Arthur was almost vibrating. “London has a door.”

Molly grabbed the back of his sweater. “You are not walking through it.”

“I was not going to.”

“You leaned.”

“I was admiring.”

“You were leaning with intent.”

Kendis walked slowly toward the center of the room, her boots clicking against the polished floor. The runes above seemed to shift in response to her presence, not bowing exactly, but acknowledging. She hated how much that did and did not comfort her.

She stopped beside the table. The teapot steamed.

Of course it did.

Tony came up beside her and lowered his voice, “Did you know about this?”

“No.”

“Did your magic know?”

Kendis hesitated.

That was the problem: something in her did recognize the Rotunda. Not as memory. Not as something she had seen. It was more like she was stepping into a room that had been waiting for her name before it became real.

“I don’t think so,” she said. “But the land did.”

Tony absorbed that with a tiny tightening of his jaw.

Then he nodded once, because he was Tony, and panic in him usually became engineering.

“JARVIS?”

JARVIS’s voice came through the room, very calm and very offended. “Sir, I was unaware of this chamber until approximately forty-three seconds ago.”

Tony pointed upward. “See? Rude.”

The Rotunda lights flickered like laughter.

Kendis found herself smiling despite the alarm sitting under her ribs. “It’s a door room.”

“It is a magic transportation rotunda that manifested without permits.”

“Door room.”

“Kendis.”

“Tony.”

Pepper pinched the bridge of her nose. “I am adding an appendix to the emergency manual.”

Cristopher had already moved to the edge of the room, studying entry points, doors, sightlines, and potential cover. Jude stood beside him, calm but watchful.

Dom’s fingers hovered over one of the doors as his eyes swept over the runes. “Where do they go?”

Kendis looked around at the glowing labels. “I would assume they go where they say.”

Brian frowned. “You assume?”

“Some doors are more symbolic than literal,” Jason said, eyeing the doors warily.

Ron’s voice rose. “That is not better.”

Mia, practical as ever, asked, “Can anyone use them?”

The Rotunda went still.

Kendis felt the answer before she knew it.

“No,” she said. “Not unless the house allows it, or I do.”

She crossed her arms. “We are not exploring them today.”

Wei Ying visibly deflated.

Hermione looked wounded.

Arthur looked devastated.

Ian actually pouted at her.

Tony pointed at all three of them. “No field trips.”

Kendis turned toward the Rotunda at large. “We are having a conversation later about boundaries, consent, and not springing entire magical infrastructure systems on me in front of guests.”

The room glowed warm gold.

“That was not an apology.”

The glow dimmed.

“Better.”

Miss Parker took a biscuit from the table. “I like it.”

Kendis stared at her. “Of course you do.”

“It has dramatic lighting, escape routes, and secrets.” Miss Parker shrugged. “Frankly, it’s the best room so far.”

Jarod picked up a teacup. “It also serves tea.”

Miss Parker looked at him, “That is why I said best.”

Kendis let them look for another minute. Only a minute. Long enough for the house to feel seen, not long enough for Arthur Weasley to lean himself into London or Wei Ying to charm the New Orleans door into telling him its life story.

Then she clapped her hands once.

“Basement,” she announced.

Tony stared at her. “You’re just moving on?”

“Yes.”

“The house manifested a dimensional transit hub.”

“And if we stay here, someone will touch something.” Kendis shot him a glare. “So, basement.”

Rhodey nodded. “For once, I agree with Kendis’s tactical retreat.”

Ron muttered, “I always agree with tactical retreat.”

They left the Rotunda reluctantly, some more reluctantly than others. Kendis felt the chamber watching as the door sealed behind them, disappearing back into the hallway wall as if it had never existed.

The window returned.

Kendis stopped and glared at it.

The house had the nerve to look innocent.

Tony leaned close. “You know this means we live in a house with a secret travel hub.”

“We already lived in a house with an infirmary that appeared out of nowhere.”

“True,” Tony nodded. “We’re escalating.”

“I am going to drink later,” Kendis said with a put-upon sigh as she turned to guide the group back downstairs. There, off the right side of the stairs, was a narrow door. The wall slid away to reveal a narrow elevator.

“Uh,” Jason said, staring at it before shooting a look at Kendis.

“I do not think we are all going to fit into that.”

“Trust me,” Kendis said as she patted his arm and walked inside. The group piled in, and the walls of the elevator adjusted to the massive group. The trip to the basement was quick; the doors pinged and opened.

The basement was cooler and the air a bit heavier than the main house. There was a short corridor that they walked through before it split into two rooms.

The right belonged to Tony, and the left belonged to Kendis.

She knew without anyone telling her because the house had made the distinction obvious: blue-white light and polished tech glowing from one side, warm wood and black industrial walls waiting on the other.

Tony perked up immediately, and Kendis saw it. She narrowed her eyes at him. “Behave.”

“I have always behaved in my lab,” Tony said, throwing her a cheeky smirk.

Pepper coughed.

Rhodey laughed outright.

Yinsen simply lifted an eyebrow because spending three months apparently showed him firsthand what a bald-faced lie that was.

Tony placed a hand over his chest. “Wounded, betrayed, and in my own basement too.”

Kendis opened the right-side doors before he could monologue.

Tony’s lab spread out like a futuristic command center, all gray metal, blue accent lighting, polished floors, glass, monitors, armor displays, and holographic workstations. An Iron Man suit stood centered on a circular platform, lit from below like a saint in a very expensive religion. Workstations curved along one wall, screens alive with schematics. Tool racks and robotic arms lined the opposite side. A modern forge glowed at the far right, because apparently Tony Stark could not just have a lab; he needed a medieval-industrial side quest with precision temperature control.

At the far end, beyond the glass, Kendis could see the outline of motorcycles in her own garage.

The group went quiet.

Kendis watched them take it in and tried to see it through their eyes. To her, Tony’s lab was familiar now: danger, genius, insomnia, problem-solving, guilt, creation, love. To everyone else, it probably looked like the inside of a classified defense contractor’s dream journal.

Ron whispered, “That suit is just standing there.”

Tony brightened. “Yes, it is.”

Hermione frowned, “Is it armed?”

Tony looked offended. “It is always armed.”

Pepper said, “Tony.”

“Defensively armed.”

Rhodey said, “That means armed.”

“Contextually armed.”

“That means armed with excuses.”

Yinsen moved slowly toward the workstations, his expression softening in a way that made Kendis’s throat tighten. Tony noticed too. His whole posture changed, some of the performance easing out of him.

“This is where you work?” Yinsen asked.

“Yeah,” Tony nodded. “This is the new version.”

Yinsen looked at the suit, then the tools, then Tony, “You have built yourself a cave with better lighting.”

Tony’s smile turned small and real. “And fewer terrorists.”

The room went quiet for a beat.

Kendis stepped closer to Tony, not touching this time, just there.

Yinsen nodded gently. “Good.”

That was all. It was enough.

Then Arthur Weasley ruined the solemnity by whispering, “What does that arm do?”

Tony lit up like a Christmas tree.

Kendis pointed at him. “No demonstrations.”

Tony deflated. “You didn’t even know which arm.”

“All arms.”

“But—”

“All.”

Dum-E, who had followed them down via bot-access route, rolled proudly into the lab and raised his claw.

Kendis pointed at him too. “Especially you.”

Dum-E lowered his claw.

Butterfingers beeped from behind U like he had been personally spared.

“No one is spared,” Kendis said.

Miss Parker circled the edge of the room, careful not to touch anything. “This is excessive.”

Tony smiled. “Thank you.”

“That was not a compliment.”

“It was in my dialect.”

Dom studied the motorcycles visible through the glass at the back. “That yours?”

Kendis smiled. “Mine is the left.”

Tony sighed dramatically. “And so begins the betrayal.”

Kendis led them back across the basement split and opened the left-side doors.

Her garage smelled like oil, wood, metal, polish, and home.

It was wide and square, with polished concrete floors, black sheet-metal walls, warm wood ceiling slats, black beams, and pendant lights. The west wall was covered in tools arranged with a precision that made Kendis’s soul settle: wrenches, sockets, rings, chains, parts, hanging components, everything where it belonged. A wooden sign read “Kendis’s Bikes.”

Long warm wooden cabinets ran beneath the tools. The opposite wall held black tool chests, floating shelves, framed motorcycle photos, helmets, parts, and keepsakes. At the center, on a lift, sat a black Triumph Bonneville-style motorcycle, gleaming like a promise.

Beyond the open double sliding black farmhouse doors, Tony’s lab glowed blue-white in the distance.

Two worlds, one basement, basically a symbol of their marriage in architecture.

Kendis stepped inside and inhaled.

This was the room that did not ask her to be Lady Blackmere, village anchor, magical problem, public figure, wife of Tony Stark, or whatever else people decided she was that week.

This room knew her hands first.

Letty entered behind her and immediately smiled. It was not a polite smile; it was a true, genuine smile.

“Oh,” Letty said. “This is good.”

Kendis felt herself relax. “Yeah?”

Letty walked toward the bike, eyes sharp and appreciative. “Very good.”

Dom followed, his gaze traveling over the tool wall. He nodded once. “Everything has a place.”

“As God intended,” Kendis said.

Tony made a strangled noise. “You do not say that about the garage at home.”

“Because your workshop looks like a genius raccoon exploded inside a weapons catalog.”

Rhodey said, “Accurate.”

Pepper nodded. “Deeply accurate.”

Brian crouched slightly to look at the lift. “Custom?”

“Mostly,” Kendis said. “Tony improved the hydraulics after I threatened the old one.”

Tony lifted a finger. “She did threaten machinery.”

“The machinery deserved it.”

Mia looked along the shelves, where motorcycle photos mixed with family pictures. “This feels like you.”

Kendis ran a hand over the edge of the central lift. “It is.”

That came out more honest than she expected. Tony, for all of his faults, was not only generous but thoughtful. This entire room was made with Kendis in mind, and it touched her deeply.

Ron was looking at the tools with mild fear. “I don’t know what half of these do.”

“They fix things,” Kendis said.

Wei Ying drifted closer. “Can they also break things?”

Lan Zhan said, “Wei Ying.”

“What? It is a reasonable question.”

Kendis smiled. “Yes.”

Wei Ying looked delighted.

“No,” Kendis added.

He sighed.

Hermione was examining the sign with a fond look. “You really do love this room.”

Kendis did not bother denying it. “I understand this room.”

Happy stood near the door between the lab and garage, looking back and forth. “So Tony gets the Iron Man bunker and you get the motorcycle kingdom.”

Kendis grinned. “Correct.”

Tony placed a hand over his heart. “We prefer ‘advanced private engineering facility.’”

“No, we don’t,” Rhodey said.

Yinsen looked between the two spaces, his eyes warm. “It is good. Separate, but connected.”

Kendis looked through the open doors to Tony’s lab, where blue light spilled across her darker floor. Tony’s world was visible from hers. Hers was visible from his. It was not merged; his workshop did not swallow hers up. They were not competing for space; they were connected.

“Yeah,” she said. “That was the point.”

The house lights warmed overhead, and for once, Kendis did not scold it.

They lingered longer than they meant to. Tony answered three questions before Kendis cut him off. Letty and Dom inspected the bike with proper respect. Brian asked something intelligent about the engine, which earned him a real answer. Mia smiled when Kendis started talking with her hands. Hermione asked whether enchantments and mechanics ever overlapped, and Kendis told her yes, but not near anything with a fuel line unless everyone wanted to meet their ancestors early.

Eventually, Tony looked toward the far side wall with the particular gleam in his eye that made Kendis’s instincts sharpen.

“No,” she said.

He blinked. “I didn’t say anything.”

“You were about to.”

“I was merely thinking—”

“Dangerous start.”

Tony ignored her. “There is technically one more area.”

Pepper closed her eyes. “Tony.”

Rhodey groaned. “Is it bigger than this?”

Tony smiled. “Define bigger.”

Kendis turned to the group. “There is a showroom off to the side of the house.”

Tony spread his arms. “A beautifully designed vehicle showroom.”

Kendis continued louder, “It contains cars, bikes, prototypes, restored classics, and enough of Tony’s ego to create its own weather system.”

Tony frowned. “Unfair.”

“Accurate,” Pepper said.

Dom’s attention sharpened immediately.

So did Letty’s.

Brian looked interested.

Mia looked amused.

Kendis saw the danger. The tour would never end. Tony would start with one car, then somehow explain the engineering evolution of half the collection, and Dom would ask one quiet, devastatingly precise question that would encourage him. Then Letty would want to see the bikes. Then Brian would ask about engines. Then Arthur would touch something, and then Molly would yell. Then they would all die of old age in a showroom that was probably climate-controlled enough to preserve them.

“No,” Kendis said firmly.

Tony turned to her, betrayed. “Sweetheart.”

“No.”

“But Dom is here.”

“Exactly why no.”

Dom’s mouth twitched.

Kendis pointed at him. “Do not help him.”

Dom held up both hands. “Wasn’t going to.”

Letty’s smile said she absolutely would have.

Kendis narrowed her eyes at her, too. “You either.”

Letty laughed.

Tony tried again. “It would only take ten minutes.”

Pepper, Rhodey, Happy, Yinsen, Kendis, and JARVIS all said, “No.”

JARVIS added, “Based on prior showroom tours, Sir’s estimate is inaccurate by approximately three hours and forty-seven minutes.”

Kendis looked at the ceiling. “Thank you, JARVIS.”

Tony glared upward. “Betrayal from my own son.”

Dum-E beeped sadly.

“You are also not helping,” Tony told him.

Butterfingers bumped gently into Tony’s leg, either in comfort or poor navigation. Kendis decided it was both.

Molly clapped her hands from the garage doorway. “Then we are finished?”

Kendis felt the word settle over her.

Finished.

The tour. Not the house. Not whatever the Rotunda meant. Not the endless unfolding life inside these walls.

But the showing-off part. The walking everyone through the bones of the place and letting them see where love had become architecture.

“Yes,” Kendis said. “We’re finished.”

The house hummed.

Soft. Proud. Almost shy.

Kendis looked around the garage one more time: the bike on the lift, the tools, the warm ceiling, the open doors to Tony’s impossible lab, the gathered people spilling through both spaces, laughing, arguing, touching nothing they were not supposed to touch, mostly because Molly and Pepper were terrifying.

Tony stepped beside her.

“You know,” he said quietly, “for someone who threatened to make everyone sit on the floor, you did good.”

Kendis snorted. “I am an excellent hostess.”

“You threatened a hallway.”

“It needed boundaries.”

“You threatened a portal room.”

“It needed boundaries more.”

Tony’s smile softened. “You okay with it?”

She knew he meant the Rotunda, the house, and the rooms that kept appearing like answers to questions she had not asked out loud. The way their home was becoming more than shelter, more than luxury, more than a private place for two people who had never expected to be understood.

Kendis looked through the glass toward his lab, then back at her garage, then toward the stairs where the others were already beginning to drift upward toward food and noise and the rest of the party.

“I don’t know yet,” she admitted.

Tony nodded.

That was why she loved him. Well, one of the reasons. He did not rush to fix that answer, and he did not tell her it was fine. Tony just stood there beside her, quietly supportive.

The Concord House dimmed the lights once, warm and gentle.

Kendis rolled her eyes, though there was no heat in it. “Nosy.”

The lights flickered.

Tony smiled. “Affectionate.”

“Still nosy.”

“Also true.”

“We should go before you try to show us the showroom again,” Kendis laughed. “And then we will be trapped here until sunrise.”

Tony muttered, “It is a very good showroom.”

Kendis took his hand and pulled him toward the stairs.

“I know, baby,” she said. “That’s why it’s dangerous.”

Behind them, the garage lights glowed warm over Kendis’s bike, and Tony’s lab shone blue through the open doors.

The house had shown them everything it was willing to show for one night.

Kendis had the sinking feeling it was nowhere near done.