Mono had seen the Predacons come to life, one of the few Vehicons who managed to reconnect with Shockwave and Starscream on Cybertron after escaping Autobot custody. While the other Vehicons accepted their change in authority with the Autobots, Mono did not. It was quite a surprise to know Shockwave was up to his old tricks and the result of which were two huge monsters.

Darksteel had his own goofy personality, unhinged even, but Skylynx was intriguing. Despite being born from a lab dish, the burly beast displayed hidden intelligence, but his ego overtook his reasoning a bit quick. Mono was a little too curious for his own good as he watched Starscream take a prod one too many times to the larger being before getting roared at. It was Shockwave who took the initiative to calm the beast down. Fascinating.

The Vehicon observed the Predacon for some time, admittedly too close. It was more trying to understand how the creature worked more than anything. A Predacon that could evolve to transform was only believed to exist once and that was Predaking. Having two more was just a modern science no one could truly behold. Then one day, Mono found something surprising.

Skylynx was furious at Darksteel and drove him off in an uproar of beastly fury despite being in robot mode. When the latter was gone after giving a roar back and stomping off to parts unknown, the dark teal and dark red Cybertronian huffed and shook irritably.

Mono had been walking nearby when he heard the scuffle and peaked around the corner of the old medbay that had no operable doors for eons. He wanted to say something when he saw Skylynx claw at his own interface panel with a whine. Then it clicked. Skylynx was in heat. It was his first one, and he wasn't entirely sure what to do yet. While Predaking was possibly already taught or picked up on basic Cybertronian exotic organs, neither Skylynx nor Darksteel had seen any need for the information up until now.

Skylynx hissed when after pawing himself he seemed to figure out how to open his own panel specifically for his need. He stared at his spike and barely prodded it only growl from a flare of pleasure when he stroked it a certain way. Mono watched every detail of the Predacon's journey into maturity. While he had his back turned, the Vehicon snuck in and managed to keep behind him as the larger mech placed a servo on the wall and slowly figured out how to stroke himself. The poor thing had mixed feelings; Mono understood that more than the Predacon possibly could know because once, he was the exact same way.

Born as a clone, Vehicons were raised as soldiers and were only knowledgeable of exterior threats to their cause like the Autobots at the time. But no matter how altered they were, life always found a way to explore every possibility...and that's exactly what Vehicons like Mono did. They discovered interface which spread among the barracks as eventual common sense, they made their own personalities, and they cultivated Cybertronian divergence even if there wasn't much to be diverse in. Predacons seemed to be no different and for that, Mono felt Skylynx was a kindred, heartfelt creature of forced science.

Mono heard him growl and rumble feeling the new sensations. He didn't interrupt the process and instead hid behind a medical berth where he could see the Predacon enough to not be spotted in case Skylynx turned around. He sat and crossed his legs at first like a youngling before staring when things became more aggressive.

Skylynx turned and placed his back against the wall, his wings puffing out slightly among being squished as he got rough with himself. Mono felt heat flare across his systems watching what he shouldn't have been and slowly reached down to touch his panel when his spike began to pressurize, and his valve flared seeing such a large member. He knew it was wrong. This wasn't right for him to be invading a private moment and breaking Skylynx's trust, not that there was much to begin with. But he wanted to know; in a way, he wanted to help him.

Letting his valve panel retract but not his spike, he carefully realigned himself to face the Predacon without being seen where he had a perfect view of the beast. He propped one of his legs up to push against the berth's support and the other remained bent so he could rest his arm on his knee. He spread his legs and continued to observe the motions of the Predacon. Ironically, Skylynx experienced his first overload already. He released onto the floor with an animalistic whine. That was Mono's cue to get to work.

The Vehicon began to part his valve petals and imagined the Predacon entering him hard. There was no way a beast like him would be gentle and frankly, Mono didn't want him to be. He imagined Skylynx holding him down by the neck and thrusting to break him in half, chasing his own overload over his and using him again until he was satisfied regardless of if Mono even endured a shred of pleasure. He could also believe Shockwave was one of those mechs who would have no problem in strapping him down bent over a table so monsters like Skylynx could simply slide in with ease repeatedly like a bitch to be bred for science without any consideration of the safety of the volunteer of the experiment.

The visual made him force digits into himself. Mono rocked his servo to push his digits as far as they could go and tried his best to stay silent. He paused briefly when Skylynx sniffed the air and saw a gleam in the Predacon's optics how he desired carnally what he was sensing. His spike rose as his optics dilated in need. But the beast still was not the sharpest tool in the shed and thought it was himself.

Mono was already leaking lubricant enough to pool under him and if Skylynx wasn't about to frag him senselessly, he wanted something more than just his digits to really feel worthwhile and make the Predacon seek him. He saw a cortical psychic patch discarded off to the side. At first, he was hesitant to take it mainly because it was Shockwave's invention, and he didn't know how the scientist would react to misuse of his technology. On the other hand, maybe he would be used as a Predacon's play toy if he did.

His decision was made as he sank the patch's end into himself with a muttered curse. He moved it rapidly in no time to sync with Skylynx jacking himself with a purr practically thrusting into his servo. Mono's systems skyrocketed observing each detail of Skylynx's spike and memorizing it to envision its ridges pushing against his walls.

He was overheating in no time with the cortical patch acting as a fantastic substitute for what he really wanted. The struggle to keep his chassis from making noise was one of the hardest things he ever managed in his life. Skylynx overloaded again with a drunk grin on his faceplates.

By the grace of Primus, Skylynx was suddenly called over the base's intercom and the horny beast hissed angrily at his disruption. He paused at the doorframe to sniff the air again and licked his chops hungrily but turned to leave before he angered Starscream. He moved out in seconds after closing his panel and that left Mono alone to self-service himself.

Mono shoved the patch deep within and finally gave out a moan he had been holding back for too long. His processor almost shut down from the pleasure and he bucked into the device until he was finally driven over the edge. He instinctively covered his faceplate even though he had no mouth and clenched his legs shut arching at the lasting aftershocks he received. Even when his body felt like mush and he was in the clear to clean up, he refused to budge for a while to enjoy the little ripples of feeling pressure. He could only wonder what the real thing from Skylynx would feel like.

A few hours later, Mono had made sure everything was in order and went to Shockwave who all but ignored him like usual. The post haze of the overload still lingered. He refrained from showing that weakness in front of his superiors. Everything resumed normally until the Predacons returned.

The Predacons were arguing with each other until Skylynx paused and sniffed. Steam blew from his nasal vents in slight frustration. Mono went ridged as this was not the time for him to get curious.

"It's that damn smell again," Skylynx hissed.

Darksteel did the same and to Mono's surprise, he seemed well versed in what it was. The two peered around anxiously until Starscream squawked at them to get moving onto their duties. They obeyed, but Skylynx was irate.

Mono didn't encounter him again for some time. He thought his crush was in the clear of being detected. It was mind-wrecking how dangerous the Predacon seemed through his reactions, but that only made the Vehicon even curiouser. Then one day, he found out Skylynx knew his secret.

While he was putting things away for Shockwave, reorganizing the base, he suddenly felt an exhale against his shoulders. Mono froze for a second before turning painfully to be met with the angry optics of one Skylynx.

"You," he growled.

Mono asked weakly, "Me?"

He sniffed him again, leaning far too close for comfort for the smaller mech. "You reek of the scent."

"W-What scent exactly?"

Skylynx's response was somehow to release his spike paneling which Mono had no choice but to become aware of. There was no ignoring a spike like that, especially so close to his chest. Suddenly, Mono was grabbed and pinned against the wall, the Predacon giving certain vocalizations calculating the encounter like a strategy game, an approach Mono didn't think a Predacon could do.

Then Skylynx gave a fanged smile, "You reek of submission."

Mono felt his body betray him hearing the deep, lustful growl. The voice of the Predacon did way too much to him. He took it Darksteel may have told him of what it was, the bastard. There wasn't anything the Vehicon could do to make the situation any less terrifying yet desirable. What ended up being the worst scenario possible was his chassis automatically revealed his valve, and he saw the Predacon peer down with a tilt of his head. Mono was ill prepared when the Predacon forced him still and gave another few sniffs to confirm it was him he had been sensing.

"Mine?"

The question was so innocent yet so devious. What was Mono to say to that? As the Predacon purred and nuzzled his neck, the Vehicon just accepted his newfound interest, not that he really could do anything to deter the creature at this point. The only thing he could do now was make himself presentable as the spike wasn't going away anytime soon.

Mono managed to slip out of Skylynx's grip and settled to lean over a flat surface to present his valve to take. "Yours."

Skylynx seemed to put the pieces together quickly and overshadowed the smaller mech with a dominant growl. Mono felt the spike prodding at his entrance as the Predacon aligned himself, placing both servos on the sides of him. He could only hear the hiss and purr of the creature willing to take him.

He didn't care if Shockwave or Starscream heard him. He couldn't give a damn if even Megatron was out there listening. His claws raked across the surface as he was stretched and filled with the essence of the Predacon. He was marked on his back kibble by the deadly fangs and pounded into repeatedly for an amount of time he lost track of. As far as he was concerned, he was right where he wanted to be.

AN: And now...one last bonus remains but who is it? Who does the most infamous Vehicon of all time encounter worthy of his presence? I thank you all for following this and for sticking by with previous delays. Now that our fic is coming to a real end soon, I had to save the rarest character pairing for last.