Hello again everyone! It took a couple of sleepless nights, but I finished chapter 4! God I'm tired! Sorry this one is so short, but the story finally shifted back to Cass and Megatron. Not much really happening in plot development though. It starts out with smut and ends in smut…. So if that's what your looking for you'll defiantly find here. Enjoy! XD

Special shout out to wolf girl811: Don't worry, I have some special plans for Soundwave in the future…. Wink, wink. Thank you for reading and reviewing.

WARNINGS: If you are not into yaoi, slash, or mech preg, please do not read then try giving me a hard time in the comments and reviews. You were warned on the opening tab, and you are being warned just now. So, if I'm not your cup of tea that's perfectly alright, but please don't be shitty about it.

DISCLAIMER: I don't own any stocks, trades, or licensing from the Transformers franchise. All rights are reserved for HASBRO entertainment.

MERCY

Chapter 4

What Was Once Sealed

It didn't take Megatron long to open up Cass's lower panel. The young drone was now so sensitive from his first overload that every touch delivered to his frame felt like electricity running over his metal. The warlord glided one servo over Cass's sigil and the other he carefully, with the most accurate gentle touch he had ever provided for another, traced his digits along the outside of the drone's valve. It was another new sensation for Cass, and he didn't know whether to arch into Megatron's servo or too just lie back and wait for whatever was next to come. As his spike began to pressurize again, he felt his body heat immensely. Megatron stared at him wickedly when the Vehicon's cooling vents cycled harshly. The tyrant was obviously thrilled listening to Cass struggle. Eventually he started to insert his middle digit slowly but stopped halfway to his first knuckle. Cass jolted when a whole new sensation washed over his neural net. It almost registered as pain, but he wasn't hurt. He quickly looked up at Megatron questionably and searched for an answer.

"Do you feel that?" Megatron acknowledged the look of fear on Cass's faceplate. "I currently have my digit on your seal. It is a thin piece of bio-metal that protects the inside of your valve until someone breaks it for you." Carefully he ghosted over Cass's body, and kissed the center of the frightful Vehicon's fore-helm. "Once it's broken, it stays broken forever…." The warlord continued to kiss down Cass's face-plate, attempting to calm the drone's fears. Once he reached Cass's right audio he lingered to whisper. "I won't lie to you. This part is going to hurt, but it won't hurt for long…. Once it is done, I will make you feel pleasure I'm sure you've never known before." Megatron's digit wriggled teasingly over the seal. Cass tensed again, and he clenched his servos over his masters ridged shoulders.

"M-M' Lord…." The young model tried to speak, but not a sound was uttered.

Megatron hushed Cass gently and caressed his other servo under the shivering Vehicon's neck. His thumb grazed over the thin jawline and he nipped the audio he was so attentive to at the moment. Cass gradually began to relax against his leader, and he swooned under Megatron's hot exhaust traveling around his helm.

"I'm going to push in further now." Megatron was still teasing the drone's audio receptor. "I'll be quick about it, so it won't hurt as much…. Are you ready?" Cass was still reserved but was also still delirious from his overload earlier. He loosened his grip on Megatron's shoulder and he wearily nodded his helm.

"On the count of three then." The tyrants grin widened. "One…. Two-."

"AH!" Cass threw his helm back in agony. Megatron didn't even wait to reach three before he plunged his digit all the way inside the virgin valve, breaking through the thin seal with ease. The poor young model's optics widened, and he choked on his gasps. He had never felt such pain before, and it was indescribable to him. Unconsciously he reached for the servo on his neck and weaved his digits unorganized between the much larger mechs claws.

Megatron returned the desperate touch by correcting how the servo messily entwined with his. Then he gently placed his fore-helm against the smaller mechs'.

"I'm sorry I tricked you like that," he tried to sound remorseful, "but I didn't want you to tense up. It would've been more painful if you did." His metallic finger stayed still inside the valve. Soon he felt the warm liquid of bleeding energon drip off the back of his servo, and it took a large amount of his composure not to open his own spike cover. The last thing he wanted was to add more stress to the quivering mech below him, no matter how enticing his reactions were. "I'll give you time to adjust. When you start to feel more comfortable let me know and I will start to move inside you."

"Lord…. Megatron…." Cass whimpered as optical lubricant streaked down his face. "It…. It really hurts…. I can't—mm!" Megatron kissed him. He was more aggressive about it then he intended, but he pushed himself back to be patient for just a little longer.

The young model excepted the kiss as a source of comfort. Though it was rough to start with, he quickly allowed the gesture to be a distraction from the pain. Eventually he relaxed and settled into Megatron's touch. He even became bold enough to place his arms over his master's neck. When the warlord withdrew from his lip-plates he licked and nipped his way down Cass's neck cables. Now that his other servo was free, he slid it under the younger mechs back. Being careful not to move his other servo he carefully pulled their chassis together. It was then Megatron noticed that the Vehicon's spike was again fully pressurized.

"Are you feeling better?" He asked.

"I…. I think so M' Lord…." Cass gripped the warlord's helm. "Move s-slowly…. Please…."

"Of course." Megatron's smile widened and he started to slide his finger in and out of Cass. The tight valve was already lubricating so it wasn't difficult to move. Cass bit his lower lip, still sore from the intrusion, but braced himself the best he could.

The warlord's reputation had never eluded him. Megatron was a ruthless and tyrannical leader whose warmongering was unquenchable. He's been known to threaten, beat, and has even killed troops that were anywhere near him while he was thrown into one of his rampages. Cass has even seen his brutality first hand. He watched from below the main bridge as Megatron tossed his second in command Starscream across the room like a ragdoll, without mercy.

But the moment Cass had stepped into the room, Megatron had treated him very well. He really didn't understand why the tyrant was so patient with him, but he decided he could trust Megatron at the moment. The drone was still fearful of his master's mood swings, but so far Megatron had not lied or tried to hurt him on purpose. In fact, his master was really going out of his way to make him feel good. Of course, this only confused him even more. Megatron had said Cass was summoned to the berth chamber to serve his master and help him with his pent-up energy. He thought he was supposed to be pleasing Megatron, not the other way around.

"M' Lord?" The young model panted, Megatron still thrusting his digit inside him. "I thought you…. I thought you asked me here…. To help you…." He was so distracted he didn't even feel the warlord add a second digit to his valve. "Mmmm…. I haven't done anything—Ah-hah!"

Something was suddenly hit inside of him and Cass's optics fluttered brightly with an array of colors. Megatron had curled his digits and hit a sensory node hidden in the Vehicon's valve. Cass wailed helplessly as his master hit the node over and over again, and he started to buck his hips into Megatron's servo.

"Oh, don't worry Caspian." Megatron growled. "I'm getting everything I want from you." He added a third digit to his thrusts, stretching the soft metal and wiring. There was still a small feeling of pain, but the continuous ministrations over that one spot inside of him felt so amazing he barely acknowledged it. He didn't dare ask for his master to keep thrusting or to move faster. To him it would've been too close to an order, but he moaned and pleaded with his frame for more friction. Megatron lifted himself up slightly to look down and watch his digits get swallowed by the once virgin valve.

"Reach down and stroke your spike." He ordered. "I want to watch you touch yourself."

Cass both blushed from desire and from embarrassment. He had never touched himself before, but he was even more intimidated knowing Megatron would watch him…. Then again, Megatron wanted to watch him, and if that is what his lord wanted from him, he would obey. With a shaking servo Cass lowered his arm between their frames and lightly grasped his thin digits over his erect member. He became more vocal as he stroked himself in time with Megatron's thrusts, but he turned his helm away from his master's gaze.

The warlord stared at the small mech beneath him and groaned in approval. He couldn't remember the last time he enjoyed pleasing someone else so much. Normally if he felt like relieving stress, he would just pick out any random drone and get his thrills for the night. He didn't care if his partner found release, although do to his ego he would always make sure they did. He only cared about indulging his own pleasures during the time, but there was definitely something different about Cass. The sound of his voice, the condensation rolling off his frame, the way he withered under him, everything. The warlord couldn't get enough of watching this young drone experience pleasure for the first time and staving off his own desires was worth holding back.

"M' Lord!" Cass couldn't control his vocalizer. "I feel…. I feel like I'm…. Going to explode again!"

"Go ahead." Megatron added one last digit before increasing his pace indefinitely, and then whispered. "Overload for me Caspian."

"But…. Ah! You're staring…." The young drone was starting to learn quickly. He slowed his servo and stopped moving his hips to slow down his building charge. The first time he overloaded he was completely oblivious of what was happening around him, but now that he was aware he was being watched he felt insecure. Embarrassment flowed through his processor, and he desperately tried to stop himself from his release.

Megatron, however, wasn't going to relent on him. He pushed his servo further into the valve, stretching the Vehicon's muscled walls further apart, and hitting more nodes closer to the back.

"AHH!" Cass let go of his spike and tried to cover his dermas, but the warlord snatched his servos away.

"Uh-uh." He licked Cass's digits. "I want to watch…. And I want to listen. Don't hold back."

"Ah! Ah! Lord Megatron!" Cass cried with his optics clenched tight. "Please! D-don't stare at me! I—Haaah!" One last thrust. That is all it took, and the young Vehicon fell again. He arched off the berth and screamed through the white light that had flashed over his vision. Megatron had brought him to the edge again, but this time he was pushed over, and he fell. He fell with arms stretched out, reaching out for something to hold onto.

Megatron was awe struck watching Cass reach his second overload. That same silver liquid from earlier shot out from Cass's spike. It splashed over his chassis and some of it leapt over his faceplate. Meanwhile, lubricant rushed over Megatron's servo which he had stopped moving. He couldn't move it much as the valve walls tightened around his digits, but he curved them inside still reaching the sensory nodes to help his lover ride the last waves of his orgasm.

His lover? Had that thought really crossed the warlord's mind? A drone? A Vehicon? His lover? Could that be possible? Well, for tonight at least he would treat him as such, and when his lover stopped convulsing, he pulled his digits out. More lubricant spilled out onto the berth and Cass shivered violently when the cold air flowed into his stretched-out valve. He moaned and shook his helm as the feeling of heated electricity tingled up his frame. By the time the sensation faded out Cass felt exhausted. His entire body went numb and he stretched along the berth once again, occasionally twitching at the touch of cool mesh cushioning and caressing his hot body. He wanted to rest. He needed so badly to fall into recharge and let the night finally end. And he would have, if the sound of a panel sliding open hadn't alerted him back to the realm of the functioning.

"Don't pass out on me yet." Megatron pulled Cass over his lap again, only this time there was a large mass grazing the outside of his valve. The young model strained to lift his helm high enough to glance down at his hips. His tired optics flew open at the roaring sight of Megatron's immense, erect spike.

"Lord M-Megatron?" The timid Vehicon tried to close his struts, but he was still too weak. "You're so big…. What-?" His optics fluttered low and his helm suddenly felt heavy.

"I said not yet Caspian." Megatron still spoke tenderly to the sweet Vehicon. He spread his knee joints further apart almost into a split, then rubbed the underside of his spike over Cass's valve. The lubricants glistened as it slid under Megatron's large member. "There's one more thing I need you to do for me, and then you can rest…. And I'm sorry if this gets too rough for you, but I can't hold back anymore."

Through unsteady intakes and under eager, violet glowing optics, Megatron pushed the head of his spike into Cass's valve. It was tight, but the lubricants made it easy for the warlord to push nearly half of his spike in, but he had to stop there for a moment. Cass had grabbed his master's wrists and shook drastically.

"Mm…. Mm…. M' L-Lord…." He sobbed through gritted dental plates. "You're…. You're too big…. Ah! You can't…. AHH!"

All restraint Megatron had left in him was gone, and he forced his spike to the hilt. He couldn't wait for Cass to adjust and started pumping his hips rapidly. He would pull his spike out to the head and then would slam back to the hilt again as fast as he could. He was sure he might have hurt the smaller mech but grew less concerned as the drone's spike pressurized a third time.

"Oh?" The tyrant grunted with a sharp grin. "Do you actually like it rough?"

"M-Megatron!" Cass called out in ecstasy, his mind too far gone to remember his formalities, and he called out as loud as he could over his cooling vents. "Megatron! Megatron! Megatron!"

Each thrust increased when Cass called out for his master. He finally let go of Megatron's wrists and let his servos fall above his helm, unwittingly exposing his entire heaving body. Cass arched and withered wantonly under Megatron, begging him non-verbally for more. The warlord leered over his desirable lover and kissed him feverishly. "You are beautiful." He would've been more surprised with what he just said if he wasn't so close to the edge. Cass's only response was a desperate whimper into Megatron's oral cavity. Their glossas tangled sloppily, and Cass's optics flashed half open with different colors.

"Please…." He mumbled between open and breathless kisses. "Please…. Don't stop…. I…. Again…."

"Mmmm…. Me too." Megatron broke the kiss so he could suck on Cass's neck cables. "I'm going to overload too. And I'm going to do it inside of you."

The drone didn't answer. He couldn't answer. His processor had utterly blanked out. He could barely tell that Megatron was still with him. His master had become nothing, but a giant silvery-grey blur. From the top of the fuzzy shadow, Cass could clearly see two bright violet orbs. No doubt they were Megatron's optics, and they glowed brightly. Peering down at the defenseless Vehicon like a feral animal hiding. Lying in wait to finally seize his prey…. And consume him.

"Caspian…." Megatron's voice rumbled low yet uneven. "I am very close…. Are you ready to be filled?"

Still no answer. Just the continued sound of harsh cycled air, desperate panting, and muffled moans. He could feel Megatron's thrusts become ridged, and Cass's arousal was building for the third time. With every thrust he drew closer and closer to the edge again. Suddenly he found himself conscious enough to pick up on one emotion. Fear.

"…. No…." Cass was so quiet Megatron almost didn't hear him. "….. N…. No…. Megatron…."

"What?" The warlord grunted through his consistent thrusts. He was too far gone to stop now, but he did slow his pace. "What is it? Am I still hurting you?"

"No…." The drone's sobs had become so weak his voice crackled with static. "I'll…. Fall…. I'm afraid…. I'll fall…."

Megatron had no idea what he was talking about, but it was obvious to see through the young mechs' delirium that he was afraid. He didn't want Cass to be afraid just before an overload, even if it did make his optics shutter in the most adorable way.

"Come here…." Megatron coaxed his lover to wrap his arms around his frame again, then pulled him up right. The silver mech clung to Cass so he could guide the small body over his still gyrating lap. This new angle drove Megatron's spike further inside of Cass, and the young model lurched his helm back only to quickly place it drowsily against his master's chassis. There the warlord tucked the heaving faceplate gently under his chin.

"Hold onto me then…." He whispered as delicately as he could through his pent-up charge. "I will hold onto you as well…. So when you fall, you won't fall alone…. I will catch you…."

"Hahhh…. Mega…. Tra-HAH!" Megatron's servos accidently scratched along Cass's back-struts. He finally reached his overload. It was the most intense overload the warlord had experienced in a long time. His trans-fluid rushed inside the tight valve and he ruthlessly pumped his hips until he was completely spent.

The new feeling of being filled and stretched from the inside was more than enough to push Cass over the edge one last time, and as his master held him tight, he fell without distress.

"D-don't…. Let me go…." He arched into Megatron's frame, while his optics rolled into the back of his helm. "Hold onto me…. Please…."

"I have you…." Megatron grunted one last time. He was amazed how exhausted he was after all this. "I won't let you go…. Caspian."

Cass convulsed and twitched for the final time that night before he went limp against Megatron's sturdy frame. He passed out satisfied in his master's arms. Megatron gave the smaller drone a few chaste kisses along his fore-helm, before he carefully pulled himself out of Cass's valve and tenderly set him along the bed.

"Rest well, dear Caspian." The silver mech nuzzled his lover affectionately. "You more than deserve it…. You earned it."

-END-