Maybe Synth-En Ratchet, when he pins the miner Vehicon instead of burning them, gives into his instinct after chasing him down and rips off the panel and just pushes in. He's convinced himself not to give into any urges even with the Synth-En on Team Prime. But a Decepticon? A Vehicon?
The wailing makes it sound like torture until Team Prime gets close enough to hear the squelching and see he has the Vehicon head pushed into the ground aft pulled up pounding in while its babbling out anything Ratchet wants because he manually turned off the ability to overload. Team Prime just freezes unable to do anything but watch as he slams in getting the ladt of the information and still leaves it whimpering and begging aft up and shaking creampie overflowing for another overload. They all get a eyefull of Ratchetās huge spike and knot being ripped out and Arcee whistles while Ootimus is frozen. He was a "good kid" and while he geard of Ratchetās wild reputation Ratchet was always careful to put on a nice face around sweet innocent Orion and Optimus suddenly wants nothing more than to get pushed down and used just like the Vehicon.
Optimus shakily scolds Ratchet sending everyone back with their new Vehicon prisoner. Bumblebee sent first to clear out the base. He tries to ignore the spike still hanging out and how drenched he is while Ratchet rolls his eyes.
Things are tense when they get back, and Optimus can't sleep still horny and finds another sample missing, Ratchet gone and follows the pounding to find Ratchet going out the now gagged Vehicon again. Optimus freezes until Ratchet finishes overloading and without looking at him tells him to get inside and lock the door. Optimus is light headed as Ratchet pulls out grabs Optimus by the hips and throws him down telling him how slutty his waist is and how he knows damn well he wanted this. Optimus panels open before Ratchet has to ask, and Ratchet still hard is shoving in lifting Optimus half off the floor to get better force behind his thrusts.
When Optimus can't keep quiet Ratchet tells the Vehicon to fuck his mouth and if he does good enough he'll let him cream himself on Ratchet's spike finally.
Optimus is taken for a hard ride livibg his belly swollen and the last thing he sees is the Vehicon shaking apart as he is bullied on Ratchet's spike.
The Vehicon does manage to escape with a whole litter using the Groundvridge and not thinking to get the location and when tge Nemesis hears Ratchet's spike becomes everyone's White Whale and the Vehicon actually gets praise for bringing back potential medics.
Optimus meanwhile is very pregnant and Ratchet can't leave without being accosted for spike which with his sire instinct going wild to fuck means he's knocking anyone who flashes panels at him up after he pins and fucks them post "chase". Something that Megatron certainly doesn't expect or the strength of the grip not letting him even wiggle slightly away.
Sorry for the long rambling, but all the yes to Ratchet.
that vehicon is about to have the weirdest fucking day and a half ever. Ratchet manages to trap him under his foot and the synth-en is basically turning his processor into mush so before he knows it, heās fucking up into the tightest hole heās had the pleasure of fucking in milennia (did you see how small that mining drone was?), while the vehicon is mewling out information between begging for permission to overload. It is not at all what team prime expected to see, itās just plain obscene. Everyone gets to see Ratchetās huge spike with his knot swollen at the base and throbbing, and he doesnāt even mind. Heād probably walk back to the base with it hanging out, they have to stop him bc they donāt want humans to see that.
I fucking love getting that vehicon involved though, can you imagine that was you ā the Autobotsā medic is clearly high out of his mind, fucking the Prime so hard he's squealing and moaning like a bitch in heat and Ratchet tells you to put your spike in his mouth (The Primeās mouth) to keep him quiet? How can u say no to that.
Ratchet knocks up Optimus, a random mining drone, and when he goes after Megatron, instead of trying to kill him he uses his moment of surprise to pin him down and fuck him through his panels. Megatron probably enjoys it though. Then he goes back to the Nemesis carrying fat ambulance babies, and he can shake hands with that poor little mining drone.
I wonder who else Ratchet can knock up. His siring coding is making him feel even crazier than the synth-en, I wouldnāt be surprised if he ended up fucking the rest of team prime in the end.