Work Text:
Without stopping the thrusting of his hips, Rewind inserted a finger, then two, alongside his spike in Chromedome’s valve. He was enjoying (and recording) a deep moan his conjunx’ let out when the third finger eased its way in and created some actual stretch in the slick entrance, and yet…
“Rewind, ah- please,” Chromedome spread his legs even wider, desperate as ever, “P-please, touch my node, or my spike, anything…”
When they just got together, he was a bit ashamed to ask for extra stimulation, but now it became their interfacing routine.
Now they both knew Rewind’s fingers, as well as his neat spike, just won’t reach deep enough.
“I wish I could frag you really deep, my love, really fill your hungry leaking valve,” the minibot crooned, slowing down this thrusts and circling Chromedome’s external node. “I want to- want to film your thighs trembling around me…”
“But you are already making me tremble, when you -ahh- when you stroke my nod like- Like-! OH, REWI-I-IND!!!”
This is when their talk about the size usually ended – after well-practiced motions would send them both into an overload, marking the end of their morning session, they would lay down cuddling for some time, then clean themselves and be ready for a new cycle.
“…And still, I would love to properly stretch you,” Rewind sighed, earning a troubled look from his lover.
“Do you mean like using your whole arm? It’s a bit weird to me but we can try if you want, dear,” tall mech gently wrapped his hands around Rewind’s waist.
“Been actually considering getting a new spike. But it seems I don’t have space to install bigger equipment with my size and build.”
They just laid in silence for some time.
“Rewind, you know how much I love you. You shouldn’t change ,” Chromedome said, slowly caressing his lover’s plating. “And I’m sure, there are other ways to make it work~,” his voice was so deep and quiet it blended with the rumble of his internal engines.
“Yes, indeed. There are other ways,” Rewind echoed. If he had lips, he would be smirking.
.
.
.
“Brainstorm, I need a false spike. About that size,” Rewind spread his hands in the air, while Brainstorm’s optics widened with interest. “…It’s for Domey, of course. A surprise. I want to be able to magnetize it on top of my own spike panel. And you can- no, you should add some mods too.”
Brainstorm nodded. It wasn’t by far the first time Lost Light crew members would commission him to make an interface tool. A little covert gig at first, at this point his workshop had suggestive looking molds and silicone parts just laying around at the plane sight. “For mods, I’d suggest vibration – maybe double motor even, and a thrusting head. I can add much crazier mods for extra fun but… generally it’s not a great idea when Chromedome himself is not the one making an order. Him and I might be friends, and I might be the ship’s genius, but I really don’t know what kinda toys he prefers.”
“You’re right, let’s not get overboard” Rewind said. “What you said before will be enough. And Brainstorm?” - he stepped closer and lowered the volume of his voicebox - “Make sure this toy will totally destroy my conjunx’s pussy.”
Brainstorm chuckled at the crude use of the word from some Earth movie. “’Destroy’ not in the ‘actual explosion’ meaning of the word, right? You should be more careful throwing such concepts around me ,” he gestured at the pile of gun parts at his desk. “But I got you, Rewind. It will be ready soon!”
.
.
.
“So, am I understanding it right, you want me to make your valve smaller?” Ratchet crossed his servos, looking at Chromedome already laying himself down on the medical berth.
“Yes, you are understanding it right. And yes, this is for Rewind, so you know the um. What size I’m going for.”
“You are really lucky I don’t have a more important job to do at the moment, kid.” Ratchet sighed. “In a case like this, I can only offer you a full transplant. Also I should inform you that you likely won’t be able to engage with spikes proportional to your actual size and bigger…”
“I only interface with Rewind anyway” Chromedome interrupted, almost offended. “And this surgery will improve our interface greatly, can’t you see?”
“I see, I see. But a full valve transplant is quite a big deal - mainly because your current valve will be discarded – so I need to make sure this is a well thought-out decision.”
“In fact, I made this decision less than an hour ago. But I should have done this much, much sooner…”
Ratchet shook his head. He knew it’s pointless to deny Chromedome now. Would be easier to just comply and enjoy a free evening for once. He adjusted the medical berth and started placing anesthetic patches on Chromedome’s midsection and crouch. “You should be able to use your new equipment soon after we’re finished, and if you encounter any problems with it – report immediately.”
Chromedome nodded enthusiastically.
.
.
.
“Hello there, Domey,” Rewind hopped on their berth and sat on top of his conjunx. “Do I have a surprise for you.”
“Oh?” Chromedome was laying on his back, reading something. The post-surgery numbness in his lower half wore off only a couple of hours ago and his processor was already wandering, trying to imagine how his new valve would feel around Rewind’s spike. “And I have a surprise for you. But you go first.”
…
Chromedome was examining the long thick false spike in his servos. “Rewind, I love you but there is NO WAY I would be able to take THIS even before, and now..?”
Rewind was taken aback but didn’t stop admiring the shape and the color of the toy, mirroring the color of his own plating. “I’m sure I showed Brainstorm a smaller size, he might have gotten too excited… and… I’m sorry. If you can’t take it whole in one session, it’s okay! We can work with that!” There was a pause, his lover looked at him, mortified. “…Wait, what do you mean ‘even before’!?”
Chromedome retracted his valve cover, showing off his equipment. The soft glistening entrance wasn’t anything like Chromedome’s valve: it was dark metallic in color - still not painted to match its owner - and basically proportional to a minibot’s valve in size.
“You should have said you are going to get a false spike for me.” Chromedome sighed.
“And you should have said you are going to replace YOUR WHOLE VALVE just to make me feel a bit better!” Rewind was looking at the delicate, small opening and couldn’t believe his optics.
“But I wanted it too..! I was thinking about it, I was dreaming to be filled by your spike completely!” Suddenly, Chromedome reached down and spread his valve lips with two fingers. He was so wet, so needy. “Please, keep looking…” he whispered.
Rewind sat between his partner’s legs and patted his thigh. “You know, Domey, it’s… It was just very unexpected and maybe a bit too much, but. It doesn’t look bad. At all. So, you want to test it, right?”
…
“Ah- Careful! It’s new,” Chromedome gasped. And it indeed was new. Every touch felt… fresh. The placement of sensor clusters was different, compared to his old valve. And the size, of course, the size. He had three of Rewind’s fingers inside and it already felt like a lot .
When Rewind entered him, Chromedome almost overloaded just from how well it fit and from how full he was.
“You okay? How does it feel?” Rewind asked.
“I’m okay, more than okay- …just… so happy,” bigger mech rocked his hips, encouraging his partner to start moving.
Instead, Rewind reached for the toy, almost forgotten at this point. “It won’t fit inside but I’m sure it still have some use, mm?” He magnetized it right above his spike. This way, it brushed at the base of Chromedome’s usually neglected spike, and slid over his node with each slow thrust.
“Oh Rewind, I love you so much. Ohhh Primus,” The yellow visor offlined in bliss.
“There’s more!” Rewind said gleefully, switching the vibration on and mowing his hips faster.