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It had taken weeks of reasoning, assuring, placating, and a few significant sessions of guilt-induced thousand yard stares before Flambae finally convinced Robert to give it a try.
There were some non-negotiable caveats of course. Extremely thourough prep beforehand, approximately a metric fuckton of lube, and some sort of fancy engineered super-condom, made to not rip or pinch between solid metal joints.
Robert had insisted on needing it, one night when they were discussing in bed.
"I'm not looking to tear open your insides on exposed metal joints, Chad," he'd said flatly.
"That’s kinda hot though," Chad had said thoughtfully after a moment, and Robert turned an interesting shade of red and turned his face to scream into the pillow.
Admittedly, opening with "Do you think your mech's fingers would fit inside me?" wasn't the gentlest way to ease into the idea, but whatever. It had gotten them here. Eventually.
Here being pinned facedown on the floor by a big, unyielding metal hand between his broad shoulders, large enough to cover his entire back.
"What are you going to do to me now that you've caught me, Mecha Man?" Flambae taunted, throwing a smirk over his shoulder.
"Whatever I want," came the mechanically altered reply, haughty and assured. The sound of that voice sent a—not unpleasant—shiver down Flambae's spine.
There was a loud tearing sound as Flambae's suit was ripped nearly in half, a huge chunk torn away to reveal skin from his neck nearly to the back of his knees.
A second huge hand moved between his thighs, the thumb and pinky extending to force him to spread his legs. He was already hard, aching and exposed. A cool, slick touch against his hole had Flambae gasping.
"You wouldn't," Flambae panted, arching his back and trying to spread his knees even wider in invitation.
Then that cool touch began rubbing leisurely up and down for a moment before applying a steady pressure, gradually more and more until his body gave.
The first breach was a lot, thick and solid, rim straining against the stretch. The finger drew back a fraction, then pushed forward just a little further than before, over and over, until it sank as deep as Flambae's body could take it.
"Fffffuck, I ca- can't fucking believe-" Flambae's voice pitched up into a breathy whine, clenching around the solid, unyielding intrusion.
"I can." Assured and amused, Mecha Man tore him to pieces. "I knew you were fucking gagging for it. Knew you would take it like you were made for it."
A rough groan punched out of Flambae's chest, and he ground his forehead into the floor, cheeks burning with more than just fire.
"If you fucking knew then- ah!" Mecha Man cut off his complaint with an infinitesimal thrust, sinking just a little deeper before pulling back in a slow drag out. All the way until it was just wide stretch of one fingertip inside his rim, his hole clenching greedily, practically trying to suck it back inside before it was granted, sliding back in with a noisy squelch.
A slight crook of massive metal knuckles dragged the pad of that finger directly over his prostate on the next draw out. Flambae let out a sharp cry, cock twitching hard where it hung red and needy between his legs.
"Oh? Did that feel good?" Mecha Man teased him, a little sweet and a lot patronizing, repeating the motion with mechanical precision. Bullying Flambae's insides into submission until he started to shake, rough moans and desperate whines filling the air. Mecha Man kept the pace slow and steady while Flambae's cock started to leak, flames sparking and snapping all across his body.
"Faster, fuck, come on, uhhngh," Flambae moaned, trying in vain to fuck his hips back and speed up the pace.
That hand suddenly moved from his shoulders to his waist and grabbed, Jesus Christ, fuck, it was big enough to wrap nearly all the way around him, shit, fuck fuck fuck-
Flambae was manoeuvred like a toy, tilted into an unnatural arch so that his toes barely grazed the ground, even as his chest was mere inches from it, his shaky frame supported on forearms and a sweaty forehead pressed to the floor. That finger sank back in harder, meaner, abusing its easy access to Flambae's body to grind unforgivingly against his sweet spot.
"Oh fuck," he sobbed, clawing at the floor hard enough to leave score marks behind, feet pointed and straining to find purchase where there was none. The metal hands holding him in place were glowing with the amount of heat he was giving off. His cock drooled long strings of precum onto the floor, joining the puddle already there with quietly audible wet slaps.
"You'll take what I give you."
It hit him that Robert really could do anything he wanted, and Chad very likely couldn't stop him. They'd barely been evenly matched when Chad was in his supervillain prime and Robert was piloting a crumbing, hand-me-down mech.
This one was newer, stronger, faster. Robert knew him now too, how he fights, how he moves, his weaknesses.
He was well and truly trapped until Robert decided he was finished with him.
The realization was like a punch to the gut, hurtling him right up to the knife's edge. "Close, close, close- gonna, m'gonna come-" he sobbed, squirming fruitlessly against the oncoming tide.
"Already?" Mecha Man said, a little awed, a little amused, and a little mean. One final cruel grind of a giant fingertip and that was it.
Flambae didn't have a hope of stifling the scream that tore out of his throat as orgasm slammed into him, legs shaking and straining, palms scorching the floor as pleasure ravaged through him, sharp and sweet and hot.
The tears on his cheeks boiled to steam near instantly, body jerking with each pulse, nonsense babbling falling from his mouth until ecstasy loosened its grip and he sagged, boneless and shivering in the aftermath.
The mech's hands, gentle now, moved him like a ragdoll until he was cradled in front of the chest plate, which opened with a hiss. Robert reached out, taking a gentle hold of his jaw and tilting his head up to make eye contact.
"Okay?" he asked, big brown eyes soft and concerned.
"Soooo fucking good," Chad slurred, prompting a quiet chuckle from Robert.
He reached forward with both hands, carefully avoiding the still-hot metal, and helped Chad shuffle into the too-small cockpit.
The second he was in Robert's space, clumsy hands went for his belt and he bit at Robert's exposed neck.
"Lemme suck your cock," he mumbled against flushed skin, grinning at the reflexive jerk forward of Robert's hips.
"Are you sure you're-"
"Now, Bob Bob," Chad griped, and finally just grabbed him by the thighs and lifted, throwing both legs over his shoulders and shoving his face against the tented front of Robert's pants.
"Fuck!" Robert yelped, scrambling at his belt. "Okay okay okay," he wheezed at Chad's impatient growl, shoving all offending fabric out of the way and finally getting his cock out.
The second he was exposed Chad was on him, stuffing his cock down his throat as far as humanly possible.
"Jesus fuck, Chad," Robert gasped, head snapping back and nearly braining himself on the metal of the mech.
Chad only hummed in response, bobbing his head faster, greedily, not caring about the obscene slurping noises he was making in his race to get Robert to come down his throat as fast as possible.
"Shit, just look at you." Robert raked his fingers through Chad's hair to sweep it away from his forehead, looking down to take in the picture of him flushed and greedy, swallowing Robert's cock down like he was starving for it.
Chad swivelled his eyes up to meet Robert's gaze, a groan escaping at just how wrecked the other man looked. Freckles standing out against a red flushed face, mouth open as he heaved for breath, pupils blown wide making his big doe eyes look even fucking bigger.
"Oh that’s good, fuck that's so good baby, you're so good," Robert panted, a whine creeping into his voice and shaky fingers petting through his hair.
Another moan, and Chad redoubled his already frantic efforts. He could feel Robert throb against his tongue, leaking steadily. Narrow hips jerked in his hold, instinctively chasing a hot, wet, hole.
"Don't stop, fuck, oh fuck-!" Robert's whole body went taut, hunching over Chad's head and thighs squeezing around his ears. Chad hummed happily, nose pressed flat to pubic bone, Robert shaking above him as he swallowed, and swallowed, and swallowed.
Finally, Robert couldn't take any more and pulled on a fistful of Chad's hair with a whimper. All of the tension in his body unspooled when Chad pulled off with a loud, wet noise.
"And you said I was quick," Chad teased, letting Robert slide back down until they were a mashed tangle of ungainly limbs in the cockpit.
"Shut up," Robert said adoringly, smiling that stupid dopey smile he had after every time Chad rocked his bitch ass normie world.
He dragged Chad into a dazed, sloppy kiss, fumbling blindly until he slapped a button that closed the chest cavity back up, sealing them in their own blissful, cramped, little world.