RIFTS OF DOMINION: THE OMEGA CONVERGENCE

The lab hummed with the low drone of cooling fans and the faint, rhythmic pulse of the arc reactor prototypes cycling through standby mode. Tony Stark leaned against the central workbench, the same one that still bore faint scorch marks from a repulsor test gone wrong last month—or was it the one from Bucky Barnes pinning him there three days ago? He couldn't tell anymore. The air smelled like ozone and stale coffee, undercut by the sharp, chemical tang of industrial cleaner he'd used to scrub every surface twice. Glass from the skylight had been swept up, replaced by a temporary polymer seal that FRIDAY had 3D-printed on-site. No trace left. No evidence.

Except the one burning on his left forearm.

Tony tugged his sleeve down further, the long black cashmere of his sweater swallowing his wrist. Over it, a holographic overlay from his smartwatch projected a innocuous time display, hiding the glow. He wasn't in heat anymore—the fever had broken the morning after, leaving him hollowed out and sore—but denial was a comfortable armor. Better than the Iron Man suit some days. He poked at the half-disassembled gauntlet in front of him, pretending to work, while FRIDAY's sensors tracked his vitals from the ceiling array.

"Boss," her voice came soft, Irish lilt dialed down to concerned-neutral. "Your heart rate's been elevated for the last hour. And you've recalibrated that emitter three times without changing a thing."

"I'm fine, FRI." Tony didn't look up. "Just... optimizing."

She paused, processing. "If you say so. But I've flagged anomalies in your biometrics. Nothing critical. Yet."

He ignored her, fingers tightening on the screwdriver. Three days. He'd locked down all footage from the intrusion—HYDRA's digital fingerprints wiped clean from the servers, backdoors sealed with new encryption that would make even him sweat to crack. No alarms triggered retroactively. No reports filed. Told no one. Not Rhodey, not Pepper, not even Happy, who was still bitching about the "random skylight malfunction" in the security logs. FRIDAY knew, of course. She always knew. But she was loyal code, not a tattletale.

The gold mark pulsed under the fabric, a warm throb that mocked his denial. Bucky Barnes. James Buchanan Barnes. The name had been easy to dig up once Tony ran facial rec on the blurry stills he'd salvaged—pre-WWII records, Captain America's long-lost sidekick, presumed dead in '45. Except not dead. HYDRA's pet assassin, brainwashed and rebuilt. The Winter Soldier. Tony's soulmate, apparently. The one who'd dropped in to kill him, scented his heat, and turned the mission into the most mind-blowing fuck Tony had ever had. Then vanished like a ghost, leaving Tony leaking and marked and utterly fucked in more ways than one.

He'd taken his next suppressant cycle a week early, slamming the pills down with a scotch chaser. No more slips. No more vulnerabilities. Omega or not, Tony Stark didn't do weak.

The next few days blurred into performance art. Board meeting at SI headquarters: Tony in a sharp three-piece, holographic charts spinning as he dismantled a rival's merger pitch with a smirk. Press conference outside the Avengers facility: flashing cameras, questions about clean energy initiatives, Tony quipping about saving the world one arc reactor at a time. Decommission ceremony for an old Stark missile silo turned eco-reserve: handshakes with dignitaries, smiles that didn't reach his eyes. Long sleeves the whole time. Holo-watch humming. Gold mark hidden. He performed Alpha like he was born to it—arrogant, untouchable, the genius billionaire who bowed to no one.

But at night, alone in the penthouse, the mark burned brighter. He'd trace it in the dark, remembering the weight of Bucky's body, the stretch, the knot locking them tight. The way Bucky had sucked at his breasts like a starving man, swallowing the milk his heat had coaxed out, growling about breeding him full. Making him a mother.

Tony shoved the thought down. Not happening. Not ever.

Week four hit like a stealth missile.

It started with nausea—subtle at first, a queasy roll in his gut during a late-night coding session. He blamed the missed suppressants, the chemical rebound messing with his hormones. Popped an antacid and kept working. But it built: mornings bent over the toilet, dry-heaving until his abs ached; afternoons where the smell of coffee turned his stomach; evenings where exhaustion dragged him down harder than any all-nighter should.

FRIDAY watched. Waited. Until one afternoon, as Tony slumped in the lab's ergonomic chair, staring blankly at a simulation readout, she intervened.

"Boss," she said gently, holographic interface flickering to life beside him—a soft blue avatar with kind eyes. "I'd like you to run a full medical scan. Please."

Tony rubbed his temples. "Not now, FRI. It's just... indigestion. Or a bug. Stark Tower doesn't get bugs, but hypothetically."

"The anomalies in your biometrics suggest otherwise. Hormone levels are fluctuating. Core temperature up half a degree. And you've lost two pounds this week despite increased caloric intake." She paused. "Humor me?"

He sighed, hauling himself up. The med bay was adjacent to the lab—a sleek white room with scanning pods, auto-docs, and enough tech to rival a hospital. Tony stripped to his boxers and tank, stepping into the full-body scanner. It whirred to life, beams sweeping over him in cool blue waves. He crossed his arms, staring at the wall, ignoring the way his breasts felt heavier, nipples sensitive against the fabric.

Scan complete in under a minute. Results projected on the holoscreen: vitals, blood work, internal imaging.

Tony stared.

Elevated hCG. Uterine lining thickened. A tiny cluster of cells, no bigger than a sesame seed, nestled in place.

Pregnant.

"Boss," FRIDAY said softly. "The scan shows—"

"I heard you the first time." Tony's voice came out flat, mechanical. He slid down the wall, ass hitting the cold tile floor, knees drawn up. The holoscreen hovered mockingly in front of him.

Pregnant. With the Winter Soldier's kid. Bucky's pup.

"You haven't moved in eleven minutes," FRIDAY noted after a while, her voice even gentler.

"I'm processing."

He sat there, back against the wall, the med bay's sterile air chilling his skin. Goosebumps prickled up his arms, but the gold mark stayed warm, insistent. A reminder. He thought about Howard Stark—cold Alpha eyes judging him from childhood, sneering at any hint of softness. "Omegas are for breeding, not leading," Howard had said once, drunk and vicious, after catching teenage Tony in a moment of vulnerability. Tony had built his empire on proving him wrong—hiding his designation, performing Alpha so flawlessly the world bought it. But Howard had done worse than sneer. The rumors Tony had unearthed years ago: a secret firstborn, another Omega son, discarded like trash. Thrown away. Erased.

What would Howard say now? His kept Omega son, knocked up by a brainwashed assassin. Carrying a pup that might inherit the same curse.

Tony's hand drifted to his stomach, flat for now, but he could almost feel it—the life taking root, biology overriding everything. His breasts ached faintly, a precursor to what was coming. Milk. Swelling. The whole maternal package. Mother. Bucky had growled it like a promise, knot deep inside him, flooding him full.

The mark burned brighter, as if sensing his turmoil. Bucky was out there somewhere, probably still under HYDRA's thumb, mission report claiming Tony dead. Did he even remember? Was the bond pulling at him too?

Tony didn't know if he wanted the answer.

"FRI," he said finally, voice hoarse. "Get Pepper on the line. Secure channel."

"Calling now, Boss."

The holoscreen shifted, Pepper Potts' face appearing mid-stride in her office—sharp suit, red hair pinned back, Alpha presence radiating even through the pixels. She stopped when she saw him, brow furrowing.

"Tony? You look like hell. What's wrong?"

He swallowed, staring at the floor. "Pep. I... I need you to come over. Now."

Her eyes sharpened, scent almost palpable even remotely—crisp citrus and steel, protective. "On my way. Ten minutes."

The call ended. Tony stayed on the floor, hand still on his abdomen, the gold mark glowing under his sleeve.

The universe hadn't cracked open yet. No rifts. No zombies. No long-lost brothers or angelic interventions.

But Tony's world had just tilted on its axis.

And the pup inside him was only the beginning.