Chapter 4: Contamination Protocol
The Compound’s medbay was a cathedral of sanity, all cool blue light and quiet hums. It felt like a mockery.
Tony lay on a diagnostic table, a thin sheet draped over his hips, exposed from the waist up. Sensors dotted his chest, mapping rhythms that felt foreign to him now. Bruce stood at a console, his back to Tony, shoulders hunched with a tension that had nothing to do with the Other Guy.
“It’s not fading, Bruce,” Tony said, his voice flat. He stared at the ceiling tiles, counting the perforations for the tenth time. “It’s getting worse.”
On the other side of the transparent containment field, in a separate, more fortified bay, Damon Vandro sat on a bare cot. He was showered, dressed in grey SHIELD-issue sweats, his hands clean of blood and grime. He looked human. That was the worst part. He watched Tony, his blue eyes unblinking, a live wire coiled in stillness. The containment field shimmered with a low-grade energy pulse, designed to suppress enhanced metabolism. It didn’t seem to be doing much.
“I can see that,” Bruce murmured. A holoscreen displayed a cascading flow of neural data. Tony’s brain scan pulsed with abnormal activity in the amygdala and the ventral tegmental area—reward pathways. They lit up like a Christmas tree whenever Damon shifted on his cot. “The binding is… profound. It’s not just a chemical dependency, Tony. It’s rewritten some fundamental synaptic wiring. You’re primed for him.”
“Primed.” Tony let out a short, bitter laugh. “You mean I’m hooked. My brain’s been fucking rewired to crave his come.”
Bruce flinched. He finally turned, his face pale. “We don’t know if it’s permanent. Cho’s synthesizing a targeted neuro-regulator based on the compound’s structure, but…”
“But it’s Hydra origami inside my skull. Good luck flattening it out.” Tony shifted, and the scrape of the sheet against his bare thighs was agony. A direct line to the ache, the hollow, needy throb deep inside him. He was half-hard beneath the thin fabric, just from smelling the antiseptic air that still carried a ghost of Damon’s scent from their close proximity on the Quinjet. He was disgusting.
The main door hissed open. Steve Rogers walked in, followed by Natasha Romanoff. Their steps were heavy with purpose. Steve’s eyes went straight to Damon, then to Tony, his expression a familiar blend of concern and stern disapproval. Natasha’s gaze was a scan, taking in every detail: Tony’s tense posture, Bruce’s fraught demeanor, the open, damning data on the screens.
“Status,” Steve said, his voice leaving no room for anything but a report.
Bruce gestured helplessly at the holoscreen. “The biochemical agent is a persistent neural modifier. Tony’s system has been… sensitized. The craving is physiological, not psychological. It’s going to drive behavior.”
“Drive what behavior, exactly?” Natasha asked calmly, her eyes fixed on Damon.
Tony answered, his words sharp and clear. “It’s going to make me need to have sex with him. Specifically, to be penetrated by him. To receive his seminal fluid. That’s the delivery system. The need is chemical, it’s overwhelming, and it’s designed to bypass my conscious will.” He sounded like he was explaining a faulty reactor. It was the only way he could say it without screaming.
Steve’s jaw tightened. He looked at Tony, and for a moment, the soldier’s mask slipped, revealing pure, unadulterated revulsion. Not for Tony, but for the violation. “That’s… monstrous.”
“That’s Hydra,” Natasha corrected softly. She turned to Bruce. “Can you isolate him from the stimulus?”
“The containment field filters air particles. But Tony’s had direct exposure. The scent memory alone is enough to trigger a response. His own body is now producing stress hormones that mimic the craving. It’s a feedback loop.”
As if to demonstrate, Damon stood up from his cot and walked to the edge of the containment field. He placed a hand against the shimmering barrier, his fingers spreading. A low, resonant hum filled the room.
Tony’s back arched off the table involuntarily. A choked moan escaped his lips before he could bite it down. His ass clenched, a spasm of empty, desperate need. The sensors on his chest peeped frantically, his heart rate spiking. He could feel the ghost of Damon inside him, the brutal stretch, the searing heat of completion. Saliva flooded his mouth.
“Jesus,” Steve whispered, staring.
“See?” Bruce said, his voice trembling.
Damon lowered his hand, his eyes locked on Tony’s. There was no triumph there. Only a dark, shared understanding of the trap. “It’s like a toothache in my spine,” Damon said, his voice rough from disuse. “A constant pull. Towards him.”
“Shut it off,” Steve commanded Bruce.
“I can’t! We need the data stream to refine the counter-agent!”
“Then sedate him!” Steve pointed at Tony.
“Sedatives don’t touch it,” Tony gasped, forcing himself to lay flat again, trembling. “Tried. In the jet. Just makes the awake parts more desperate.”
Natasha moved closer to Tony’s table, her presence cool and analytical. “So it’s a compulsion. You can’t fight it, but you can choose how you act on it. You’re still you in there, Stark.”
“Am I?” Tony’s laugh was hollow. “Because right now, ‘me’ is mostly a hole that remembers how full it felt. Classy, right?”
Before anyone could respond, the overhead lights flickered. The containment field in Damon’s bay stuttered, the hum dropping to a whisper before surging back with a sharp crackle of energy. Damon gasped, jerking back from the barrier as a static charge visibly arced up his arm.
“Power surge,” Bruce said, fingers flying over the console. “The Compound’s main grid is stabilizing after the last attack, there are fluctuations in the non-essential systems…”
“Medbay is non-essential?” Steve snapped.
“Containment isn’t! But the suppressant field is tied into life support to draw extra power, it’s on a secondary loop that’s…”
The field died.
The shimmering wall of light vanished with a sound like a sigh. The hum was gone. Only the plain, open doorway of the containment cell remained.
Silence, thick and electric, pressed into the room.
Damon stood frozen on the threshold, his body outlined by the blue medbay light from within his cell. He looked from Steve’s immediately defensive stance to Natasha’s poised readiness, to Bruce’s panic, and finally to Tony.
Tony was sitting up, the sheet pooling in his lap. He could smell him. Not just a memory, but the real, potent, pheromone-laden scent of Damon’s skin, his sweat, his breath. It hit Tony’s brainstem like a jolt of pure adrenaline. The hollow ache became a vicious, snarling demand. His vision tunneled.
Steve stepped forward, his shield instinctively angling. “Step back into the cell, son.”
Damon didn’t move. His chest was rising and falling rapidly. Tony could see the pulse hammering in his throat. The serum was rising in him, too. The compulsion was a two-way street.
“I can’t,” Damon breathed, his eyes glued to Tony. “It’s not a request.”
“Natasha,” Steve said, low and warning.
But Tony was already moving. He swung his legs off the table, the sheet falling away completely. He was fully, achingly erect, his need shameless and on display. He didn’t care. The chemical whisper in his blood was a roar now. He took a step towards the open cell.
“Tony, don’t!” Bruce cried.
“Stark, stand down!” Steve commanded.
Tony took another step. He saw the conflict in Damon’s eyes—horror, disgust, and beneath it, a matching, ravenous hunger. The thing Hydra had welded into their bones recognized its mate.
“You see?” Tony said, his voice gravelly with need. “You can’t stop this. It’s biology with a fucking agenda.”
He crossed the last few feet. Steve moved to intercept, but Natasha’s hand shot out, gripping his arm. She gave a minute, sharp shake of her head. Her face was grim, resigned. She understood. This wasn’t a fight they could win with muscle.
Tony walked past Steve, past them all, and into the containment bay. The air was different here—warmer, charged with the smell of Damon. He stopped inches from the other man.
“Do it,” Tony snarled, his defiance a thin veneer over the desperate need. “Before they find a way to turn the lights back on.”
A tremor ran through Damon. With a sound like a sob, he closed the distance. His hands came up, not to strike, but to grab Tony’s face, his grip desperate. He kissed him, hard and savage, a clash of teeth and tongue that was pure claiming. Tony kissed back, equally furious, his hands fumbling for the drawstring of Damon’s sweats.
They didn’t make it to the cot.
Damon spun him around, shoving him against the cool, polished wall just inside the cell. Tony’s cheek pressed against the smooth surface, his hands splayed for balance. Damon yanked the sweats down just enough to free his cock, already thick and leaking. He spat into his hand, a crude, wet sound, and slicked himself roughly.
There was no pretense of care. He drove into Tony in one brutal, shearing thrust.
Tony screamed into the wall. It was pain, immediate and searing, but it was swamped an instant later by the tsunami of rightness, of fit, of chemical bliss flooding his system. The full, stretching ache was obliterated by the solid, perfect pressure filling him. He shuddered, his own cock jerking, a bead of precome dripping onto the floor.
“Fuck,” Damon groaned, his forehead dropping between Tony’s shoulder blades. He held himself there, buried to the hilt, as if regaining control. He didn’t find it. With a ragged curse, he started to move.
The pace was punishing. Each withdrawal was a cruel emptiness, each slam back in a jolt of electric relief. Damon’s hips pistoned, his balls slapping against Tony’s ass with a wet, rhythmic clap that echoed in the sterile room. His fingers dug into Tony’s hips hard enough to bruise.
“You feel that?” Damon rasped, his breath hot on Tony’s neck. “That’s you. Clenching around me like a fucking vise. You’re so greedy for it.”
Tony couldn’t speak. He could only push back, meeting every thrust, letting the wall take his weight. The pleasure was a white-hot wire, pulling tighter and tighter in his gut. It wasn’t sweet. It was brutal, degrading, and it was everything his body screamed for.
Outside the cell, Steve had turned away, his shoulders rigid with disgust. Bruce was frozen at the console, his head in his hands. Only Natasha watched, her expression unreadable, cataloguing the mechanics of their defeat.
Damon’s thrusts grew erratic, deeper. “Gonna fill you up,” he grunted, the words sloppy with need. “Gonna pump this fucking poison right back into you. You’ll be dripping with it.”
The vulgarity was a spur. Tony’s orgasm ripped through him, violent and silent, his body seizing around Damon’s driving cock. He spilled onto the wall and floor in helpless pulses, his vision spotting.
The intense clenching of Tony’s body tipped Damon over the edge. With a final, brutal grind, he shuddered, a raw shout tearing from his throat as he came, pumping his release deep into Tony’s clutching heat. Tony could feel the hot surge, another direct infusion of the addictive compound, binding deeper into his flesh, his bloodstream, his rewired brain.
They slumped against the wall, boneless, slick with sweat. Damon softened inside him, but didn’t pull out. His weight was crushing, anchoring.
The overhead lights flickered again, then stabilized. A low hum filled the room. With a sharp, sudden buzz, the containment field reactivated, snapping back into place across the open doorway—a shimmering wall of light now separating the two men from the three outside.
They were sealed in.
Tony, still pinned against the wall, looked through the barrier. He met Natasha’s eyes. There was no judgment there. Just a cold, clear assessment.
Damon finally slid out of him with a wet, unmistakable sound. Tony’s legs buckled, and he slid down the wall to the floor, spent and stained.
On the other side of the field, Steve turned back, his face a mask of grim resolve. “Cho’s regulator is ready,” he said, his voice cutting through the heavy air. “We administer it now. While you’re… saturated.”
Bruce approached the field cautiously, holding a pneumatic injector.
Tony stared at it, then at the come leaking down his thigh. The craving was momentarily satisfied, a heavy, warm lassitude in its place. But the clock was already ticking. He could feel the roots of the need, dormant now, waiting to sprout again.
He looked at Damon, who was pulling up his sweats, his face a closed-off blank.
“Will it work?” Tony asked, his voice hoarse.
Bruce’s answer was barely a whisper. “We have to try.”
Tony closed his eyes. The only thing worse than the need, he realized, was the fear of it being taken away. He leaned his head back against the wall and waited for the needle.