Smokescreen whimpered and seemed to be enjoying the twin false spikes Shockwave got for him to play with while he was busy. His thighs and calves were strapped together in a seated position with a bar keeping them open to show off the pretty valve being penetrated, his arms bound together behind him to not obscure the view of the spike ring to make the Autobot only cum with his valve, and then there was the gag.
Shockwave thought the Autobot talked far too much and placed a wide ringed gag so he could just slip his spike in whenever he chose. For now, the gag was instead holding a removable false toy spike to keep the moans low. Technically, Shockwave wasn't supposed to have Smokescreen aboard the ship. He caught the rookie and never reported it.
"It seems your Autobot friends are desperately trying to find you. They are worried their young, weak soldier is being tortured to death, spilling information and otherwise inept at being properly cared for like a youngling. But we know different, don't we?"
Shockwave approached the mech trying his hardest to ride the fake spikes stuffed inside his valve. He was in a storage closet only Shockwave had the codes to just in case he needed to be hidden in an instant. Very rarely did anyone trespass in his lab without prior notification, but he didn't want to risk losing his new toy.
He grabbed the Autobot's chin and examined the lust in those baby blue optics. "You wanted to prove yourself, I heard, wanted to take on the big, bad Decepticons on your own. Well, now you have one. Aren't you excited?"
Smokescreen whined behind the gag, jolting his hips down as far as possible to sink the toys deep within him. Shockwave took his desperation as a yes.
He teased the rookie by stepping close with his sealed interface array aligning to Smokescreen's faceplates and especially the gag. He reached above to grab a vial of CNA off the shelf, purposely pressing forward so the gag hit his spike panel to make the toy it held mimic what could be. The base of the toy and the gag ring planted on his spike panel only briefly during this time, but it was enough to make Smokescreen blush. He didn't move away, merely looking up at Shockwave with puppy dog optics in want of the real thing.
Unfortunately, Shockwave did have a schedule to keep. "In due time, my pet."
Smokescreen's expression of disappointment was cute with his door wings sinking, but it wasn't enough to keep him from his job. Shockwave raced to finish what he could so nobody raised any questions and came to visit when they weren't supposed to.
When he was done, he stalked to his slave and noted the mess of lubricant he made from a few overloads. His claws took the fake spike in the gag out now wanting his own turn. Smokescreen's mouth was wet and willing, ripe for use. Shockwave laughed low at the little movements of the door wings indicating greedy lust for him.
"You've been good. I suppose you've earned your keep."
Shockwave gave a haughty rumble when Smokescreen immediately pressed his faceplates to the spike when it appeared. He seemed to be uncaring of the prefluid leaking onto his cheeks, nuzzling the appendage to entice the Decepticon to stick it in him. Shockwave acknowledged his determination and indulged him.
Capturing this Autobot was out of sheer luck mostly. Shockwave wasn't even after him but while he did believe in coincidences, this one was the luck of the draw. Smokescreen was so eager to fight him, he jumped in the portal not realizing he had isolated himself from his team. After he was captured solely by Shockwave, the scientist found the young mech needed a little training in obedience. It then trickled down from simple bondage to making use of Smokescreen's body to his desires.
Enveloped by a moist mouth and a roaming glossa on the underside, Shockwave let him deep throat himself on his spike. He was impressed how Smokescreen willingly learned that with the toy that wasn't meant for such a thing, yet he trained himself to take it. While the spike was sucked, Shockwave watched him go down on his toys beneath him.
The muffled moans were delightful to hear, but Shockwave didn't need it too loud to be discovered. He held the back of Smokescreen's helm and forced him to the hilt faster. Those moans were drowned out quite fast.
"That's it," Shockwave panted, "silence is a virtue, little one."
He used that mouth of Smokescreen's like it was a luxury, one he was driving home savoring every ripple of exotic tension he was provided with. His slave visually demanded more, coming hard as he looked up at Shockwave to show his vast new loyalty and acceptance of his position.
The Decepticon just continued to ram the back of his throat until he exploded. Smokescreen guzzled every drop down like he couldn't survive without it. It appealed to Shockwave's liking. But work called and his break was over. Shoving the false spike back into the gag, he let Smokescreen sit in his overstimulation.
One day, Shockwave decided to keep him under his personal walled table as he sat down to read over important scheduling discrepancies and other alarming things. His woes were healed rather quickly when he felt a glossa trail up his inner thighs to his panels.
He tried to be harsh by replying, "Can't you stay still for a second?"
Smokescreen had a different mouthpiece, one that only covered it visually with a hole in the middle, but he knew better by now that to speak out of turn. He responded with a small lick to the interface array like the brat he was. His collar and separated wrist cuffs prevented his weapons and other forms of body transformation from occurring, so Shockwave didn't have to worry about his free roaming servos doing anything stupid. When he felt the presence of the glossa again, Shockwave sighed a bit humorous at his need to be noticed.
Instead of his spike, Shockwave presented him with his valve. The servos wrapped around the underside of his lower thighs to caress the top and Shockwave almost jumped when a more than enthusiastic glossa immediately entered him. The mouthpiece was a bit colder when it was pressed against his folds among Smokescreen's digging, but it was hardly noticeably after a while.
He didn't expect the glossa to be so aggressive. It threw Shockwave against his seat, slouching ever so slightly which was not something he did...
"O-Oh," he caught himself muttering. Smokescreen was having a feast like no other. It made him look under the table like an idiot at how feverish the mech was in pleasing him.
His data pad was all but forgotten with his cannon arm trying to support him. He brought his spike accidentally, but Smokescreen took care of that too by pumping it loosely, only prioritizing the valve first. Another thing that he normally didn't do was put his pedes on the table. One ended up there giving Smokescreen more of a runaway.
"Shockwave," Starscream sneered upon entering the room.
Shockwave froze but Smokescreen didn't stop. Thankfully, Starscream couldn't see him, but he couldn't tell Smokescreen off without giving away his position.
"Star...ahem, Starscream, why are you bothering me at this time?" He tried so hard to make himself stoic despite being visually out of sorts.
"Megatron wants those reports done. You've been slacking."
No, really? "I've been busy with many other...other projects, Starscream. I will get to them in a few."
The Seeker got closer and Shockwave panicked. "Is something wrong, Shockwave?"
He slid his pede down and stomped in on the ground abruptly with a growl, "Nothing is wrong! Can I not relax every once in a while?"
The growl wasn't out of anger. It was repression from his body overheating with his sensors going wild with Smokescreen's frantic eating. The glossa lapping at his walls and his spike being pumped hard was about to make him go in front of Starscream, and he really didn't want that.
Starscream stepped back and frowned, "Don't tell me you're pleasuring yourself. Argh, there are places of privacy you can do that, Shockwave."
"Get out!" He all but fumed.
Smokescreen got his valve at the perfect time right as Starscream left and Shockwave hit his head on his arm with a shutter and dimmed shout. His slave lapped the residual lubricant and transfluid mixing. Looking down to see his faceplates covered in both stirred his post-overloaded state to risking desiring more.
The young mech proved perfect for putting that mouth to good use. The perfect pet. There were plenty of things he had in mind for the future...as long as Starscream didn't pry where he wasn't needed.
AN: I think Shockwave would be more into using his valve than his spike, especially TFP Shockwave but he would be very dominant. He gives me those vibes in the cartoon, and I think that's fitting for a psychotic scientist.