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Knotting x2

Summary:

TF Kinktober Day 19: Alt Form Sex

When Megatron walked into Minimus fucking Rodimus as a turbofox, he didn't think he'd be joining in, but that's exactly what happened. And he could never pass up the chance to get a knot in his valve.

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When Rodimus didn’t show up for his shift, Megatron expected it. When Minimus didn’t show up, that was worth some concern. Minimus was always on time, and during the rare times he wasn’t, he usually sent a comm about it. This time was definitely different. Megatron frowned as he strode down the halls, Minimus had seen off the past few days now that he thought about it. There was that one incident yesterday where he almost snapped, literally snapped his denta at Drift’s hand for setting it on Rodimus’ arm. At least Minimus was contrite over his actions after realizing what he had done.

That still didn’t explain where the two were. The likely places were either of their habsuites at this point.

Heaving a sigh, and pausing in the hallway, Megatron activated his comm and called Rodimus, hoping his co-Captain would pick up, seeing as there was little chance of Minimus picking up his comm at this rate. It kept ringing. Megatron was about to hang up when it finally clicked as Rodimus answered.

“H-hey Megs.” Rodimus’ voice sounded shaking, a noise getting muffled. Certain comms made it difficult to hear background noise, but Megatron was distinctly able to hear the wet clangs.

He made sure Rodimus could hear his heavy sigh as he pinched the bridge of his nose. “Are you in the middle of fragging right now? I don’t need you answering your comm during such activities.” Was he growling? Absolutely, but he thought Rodimus would have known better.

A sharp gasp and a burst of static from Rodimus’ vocalizer kept him from hanging up when he wanted to. It took multiple clicks before Rodimus spoke, “It’s Mins. Holy frag, Megs please.”

Primus smite him, he couldn’t believe what he was about to do. “Where are you?”

“Mins hab,” was the gasped reply, a whine breaking off Rodimus’ words and stopping him from saying anything else. If he planned to say anything else.

Megatron hung up, not wanting to hear anything else as he made his way toward Minimus’ hab. At least it wasn’t a very long walk from his location, Minimus had chosen a very specific hab in a specific location to make it easy to get to the bridge or elsewhere in the ship if need be. The load bearer had also managed to find a hab that had already been soundproofed, allowing him to hide the Magnus suit until whatever incident had revealed him.

Inputting his override code, Megatron quickly stepped inside, hitting the button inside to quickly close the door to keep the situation private from any possible passersby and nosey optics.

Megatron froze as his optics took in the sight he had just walked into.

Rodimus lay on the floor, chest pressed down. He had his knees under him, though they were spread so far that Megatron was surprised he wasn’t laying flat. Rodimus blinked at him from where his cheek was pressed into the ground, oral fluid dripping out his mouth and pooling under his cheek. A low growl had his optics snapping over to the turbofox mounting his co-Captain. It was definitely Minimus, the red optics and white and green plating a dead give away. Megatron couldn’t help but think that Minimus was bigger than he had expected from his size. What wasn’t a surprise, was just how smooth looking his plating was, unlike actual turbofoxes or his brothers, Minimus’ plating was smooth, only his tail and his nape were spiky.

Another growl and sharp yip had Megatron focusing on the two again instead of taking in Minimus’ form. That’s when he noticed the peeled paint from Rodimus’ thighs from how Minimus’ front legs were gripping tight to hold him in place. Megatron couldn’t stop his optics shifting slightly further, locking on where their arrays were pressed close together. Megatron felt his vents stutter as he realized why Minimus wasn’t trying to chase him off. They were tied. A bolt of heat shot through his frame so quick that Megatron wasn’t able to stop his fans roaring to life or the sharp rev of his engine fast enough.

Those red optics locked onto him, those oddly large ears twitching toward him. Minimus raised his snout, sniffing the air. A different growl left the turbofox. Rodimus just blinked at him, processor still lost from the fragging he had just experienced.

Megatron was frozen. He knew exactly what Minimus was smelling from him. Primus, he could feel his valve slicking up at the thought of a knot. It wasn’t something Megatron indulged in or let his berth partners know, but he loved being stuffed with a knot, the full feeling and his chosen berth partner being stuck to him for however long it took to go down was such a specifically delightful experience. Unfortunately, he hadn’t been able to enjoy it much during the war.

While Minimus was still tied to Rodimus, Megatron gave it a thought. He could escape now, override the lock so they couldn’t get out, and wait until Rodimus or Minimus contacted him. Or, he could give in and enjoy a frag. And a knot. But that was where an issue lie. It was obvious Minimus wasn’t in his right mind, running mostly on instinct as his coding demanded he breed. Megatron blinked as another incident, that same day he snapped at Drift, came to mind. Minimus had been rubbing on both of the captains. And Megatron was absolutely sure Minimus had actually licked him when they were alone in the bridge’s office. If that wasn’t a clear indication that the load bearer was interested, he didn’t know what was.

Taking a deep vent, Megatron turned enough to input the lock-in code, one that only the medics, or they, knew. Privacy was the utmost importance. Megatron made sure to send a quick message to Ratchet and First Aid, warning them of the situation that involved Minimus in rut and both he and Rodimus taking care of it. They both sent an affirmative. Switching his comm to emergency only, Megatron turned his full attention back to the situation at hand.

Now, how to go about this.

He had no idea how long Minimus was going to be stuck to Rodimus, there were many factors to take into account.

With two sets of optics on him, Megatron curled the corner of his lips up, flashing his fangs and getting a shiver from Rodimus. Megatron made sure those optics stayed locked on him as he placed a hand on his chest, dragging it down his frame. He thumbed at his hip before continuing down, past his spike, to press three digits to his valve panel. Megatron didn’t stop the grin as his panel snapped away, revealing his valve. He had no doubt the red biolights were bright with his charge. He pressed two digits into the seam, spreading apart the mesh to show just how wet he already was.

Both of the mechs on the floor let out whines.

Megatron pulled his fingers away, making a show of licking the small amount of lubricant off his fingers as he stepped toward them. He dropped to his knees in front of Rodimus, watching those slightly hazy blues lock onto his. He grabbed Rodimus’ chin, tilting it up as he bent almost in half to get close to the speedster’s face.

“Rodimus. Do you want this? I want a yes or a no.”

Primus, Rodimus looked so debauched just from getting fragged and knotted by Minimus. Megatron was almost tempted to release his spike and shove it down his co-Captain’s throat. He’s had fantasies about it, but this wasn’t the time to indulge in that. There was no way Rodimus would be able to take his spike without working up to it. Later, when an actual conversation was able to happen, he would see if Rodimus was into that. For now, he just wanted to know if Rodimus was okay with him joining in.

Rodimus let out a shaky exhale, optics slightly clearing. The grip Megatron had on his chin kept him from nodding or shaking it. Rodimus swallowed a few times, “Please, yes, yes. C’mon.”

Megatron rumbled his engine in a growl, leaning, so his lips almost touched Rodimus’ as he whispered, “Good boy.” Rodimus shivered, and if the stutter of Minimus’ hips were anything, his valve must have clenched at the words. Megatron chuckled as he pressed his mouth to Rodimus’ hard, his fangs slicing into those slick lips and letting him taste energon that quickly mixed in with Rodimus’ oral fluids.

Rodimus moaned into the kiss, frame growing slack. Megatron softened the kiss until he could pull back with a peck against those lips. He kept his fingers on Rodimus’ chin, but loosened how tight his grip was. Sitting up, Megatron had to shuffle forward, canting his hips as he pulled Rodimus’ face to his bared valve that had started to drip on the floor.

Rodimus wasted no time in pressing his glossa against his node, licking the bright red nub a few times before moving to drag his glossa through the seam of his valve lips. Megatron let out a sigh in a burst as Rodimsu pressed his mouth closer, pressing his glossa hard to part those thick mesh lips. Megatron groaned as Rodimus put as much effort as he could into eating him out. Sadly, his glossa just wasn’t that long, but he made sure to pay attention to all the nodes toward the entrance, which Megatron did appreciate. As pleasing as it was, it just wasn’t enough.

Megatron rolled back onto his heels, planting his aft on the floor to take in Rodimus’ wet face. Lubricant stained his lips pink and had joined his own oral fluids to drip down his chin. His co-Captain whined, glossa flicking out like he could continue licking Megatron’s valve. The ex-tyrant rolled his optics, reaching over to pat Rodimus on the head before sitting back. He looked over Rodimus’ back to see Minimus was still stuck, those optics focused on his valve.

Megatron smirked again, sliding his fingers through the wetness, spreading his valve lips to show off to the two mechs again. He planted his other hand behind himself to stay balanced as he slid three of his fingers inside. Megatron let his head drop back with a relieved sigh. It wasn’t as full of a feeling as he’d prefer, but it worked for now. And it worked as a wonderful tease. Without looking, Megatron started to shift his fingers, spreading them apart and moving them in and out of his valve. Already tired of thrusting his fingers, Megatron pulled them out just till the first joint was still inside so he could rub against all the nodes at the entrance. He spread his legs even more, fingers slipping fully out as he started to rub his node, smearing his own lubricant everywhere.

He was so focused on his pleasure, Megatron didn’t notice when Minimus was finally able to disconnect from Rodimus. The co-Captain dropped fully to the ground with a low noise, frame shaking as a flood of transfluid spilled out. It wasn’t until a muzzle was shoving into his valve that Megatron turned his optics down. He removed his fingers, groaning as Minimus shoved his muzzle into his valve and started lapping at his lubricant. Leaning slightly farther back, Megatron looked under Minimus to see a green and white striped, tapered spike bobbing underneath him. Megatron licked his lips as he caught sight of the mostly deflated knot at the base.

As much as he was ready to have Minimus mount him, he was also interested in holding Rodimus against him. Megatron’s hand covered Minimus’ entire head as he pushed him gently away, just far enough aside so he could reach across the small space to pull Rodimus onto his lap. Megatron let himself drop back, pulling Rodimus high on his chest. With his attention on Rodimus, Minimus didn’t wait until he was trying to mount Megatron, given their position. Megatron shifted, planting his peds on the ground and arching his hips to make it easier for the mech turned turbofox.

Minimus let out a yelp as his spike slid to the base in one move. Megatron moaned at the feeling, his spike wasn’t that thick, but it was a good weight inside, and just thick enough to rub against his nodes. Megatron pressed a kiss to Rodimus’ slack mouth, licking his lubricant off the speedster’s face. Rodimus tried to kiss back, failing to do so as Megatron kept changing where his mouth was. He kept a hand on Rodimus’ spoiler mount, his other hand holding the speedster’s hip as he finally pressed an open mouth kiss to Rodimus’ lips and shoved his glossa inside. He didn’t bother to hold back the noises as Minimus jackhammered into him.

Minimus must have really been getting pent-up, it didn’t take long before Megatron could feel the pressure of his knot shoving itself in and pulling out. Frag, he could hear it, and wasn’t that a turn on. Even better was that knot hitting all his nodes there at his rim. Soon enough, Minimus was pressing his hips as tight to Megatron’s as he could in that position, claws digging into his thighs as the load bearer started overloading. Megatron shivered at the feeling of hot transfluid filling his valve, it wasn’t enough to get him off. Not yet.

Even with the relief of transfluid filling him, Megatron could tell his valve was just too big for Minimus knot to stay. Thinking quickly, he used his grip on Rodimus’ hip to pull him down as far as he could with Minimus in the way, so when Minimus started thrusting even as he continued to overload, Megatron was easily able to snag his shooting spike once it slipped out of his valve. Minimus yipped in annoyance, a low croon leaving his vocalizer as Megatron shifted his spike back to Rodimus’ valve. Megatron clamped his hands on Rodimus’ waist as Minimus slammed his hips into the already marred aft, he rolled Rodimus’ hips, helping get that knot popped right back into that valve.

Rodimus had yelped, static taking over his vocalizer as that full knot was shoved straight in without any real warning. Optical fluid had started to spill down Rodimus’ cheeks. Megatron leaning over to lick them away as he kept his grip tight. Rodimus was shaking, gasping ‘ah's’ full of static as Minimus thrust his hips even though he wasn’t going anywhere with his knot stuck. Megatron blinked as he heard a slight ping, Rodimus’ plating moving against his thumbs where they were pressed low on his abdomen. Keeping on hand where it was, he shifted his other between them. His breathing hitched as he felt the slight swell and misplaced plating from the amount of transfluid filling him.

Megatron groaned, pressing his fingers against the swell and getting a high-pitched whine at the pressure. Oh yes, he was going to eat Rodimus out, eat out as much of Minimus’ transfluid as he could. Maybe he’ll press on the swell and make it gush out of Rodimus’ used valve. Frag, Megatron felt his spike hit his panel, he denied the release, wanting to solely focus his pleasure on his valve.

Megatron took in Rodimus’ pleasure drunk expression. Frag it all, he really wanted that knot in his valve. And there was one way to get it. Narrowing his optics, Megatron focused on a piece of coding he hasn’t used in so long. The feeling of shrinking wasn’t new, but after so long, it felt odd. He didn’t let himself shrink too much even though he was fully capable of shrinking to minibot size or smaller (if he had the alt mode for it), Megatron only went until he was close to Rodimus’ height.

Hazy blue optics blinked at him. They were now face to face, and array to array. Yes, this should work just fine. Megatron reached down, shoving his hand under Minimus so he could grab the base of his spike right behind the knot. He wrapped two digits around the thinner base, and squeezed. Minimus yelped, hips going back to jackhammering at the sudden pressure. Milking Minimus, it didn’t take long before his knot deflated enough to pop out. Megatron shivered at the flood of transfluid that spilled out onto his valve. Holy frag. How did such a small mech have so much transfluid stored inside?

Even as a spray of transfluid left his spike, Minimus was still thrusting, sharp whines leaving his vocalizer as he tried to shove his spike back inside a warm valve. Megatron, having not let go, dragged his hand up, squeezing that slightly deflated knot as he aimed that spike at his valve. Once Minimus felt the heat, he slammed his hips forward, burying himself to the hilt in one thrust. Megatron moaned, head dropping back as he was finally able to enjoy just how big that spike felt with his frame mass displaced. He was actually able to feel the slight resistance of his valve against that knot as Minimus started going to down.

Minimus was yipping, claws scratching against Megatron’s plating even as he wrapped his forelegs around Rodimus’ waist since he was unable to wrap them around Megatron’s. Megatron rolled his hips into each thrust, optics going hazy as he felt that spike throbbing. That knot started to swell as it started to pop in and out of his valve. Primus, Minimus was able to come so quick after shoving his spike in a valve. Minimus’ legs tightened around Rodimus’ waist as he started to thrust harder, the knot thickening even more as he continued to shove it in and pull it out.

Megatron’s legs were shaking as the pleasure started to crest, he could feel the charge crackle through his frame, grounding into his valve as the conductive transfluid started spurting inside his valve. Megatron slammed his mouth against Rodimus’, dragging him into a wet and filthy kiss as he used his hand not on the speedster’s hip to push Minimus’ aft forward, making sure his knot popped in and stayed in. Minimus yipped, his jaws clamping down on Rodimus’ spoiler mount as his hips stuttered. Megatron groaned into Rodimus’ mouth as his charge crested, sending him into a satisfying overload.

He released his mouth from Rodimus’, dropping his head back and relaxing as he enjoyed the feel of transfluid filling his valve and the satisfying stretch of a knot plugging him up. Yeah, that was exactly what he was wanting. Petting Rodimus’ spoiler, Megatron took a look at his co-Captain to find him passed out. He snorted. Figures. It took a few kliks of enjoying the warmth filling him to realize Minimus wasn’t moving. Pushing himself onto his elbows, Megatron couldn’t help the chuckle to find the minibot had also passed out even as his frame continued to unload as much transfluid as it could.

Megatron blinked, furrowing his brows as he noticed his middle felt a bit tight. He wrapped an arm around the two, carefully shifting them slightly over. He gaped, watching as his own plating shifted and swelled from the amount of transfluid filling him. He shifted them back onto his frame, falling back and staring at the ceiling. Now that was definitely new. But frag, Megatron found that extremely hot.

After Minimus’ rut was over, and they could all talk coherently, he was going to ask about them entering a relationship, and this becoming an actual thing.

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