Warning: This chapter contains noncon. I will mark the point it begins and ends with asterisks so you can skip if you'd like.
Her existence from then on was that of a shadow, both of her former self and as an extension of Megatron. She hardly left his side, and when she did, Arcee knew she was tethered to him, his servos always upon her in some way or another. Whether they took the form of restraints upon her frame or the tyrants own wretched talons as he held and prodded her like an amusing pet made little difference.
She stared vacantly past the Decepticon medic as she was directed to seat herself upon his table, small servos folding in her lap as her master delivered his orders. The tip of one sharp digit tilted her helm up, prompting her to meet his gaze. She obliged, unmoving as he perused her countenance at his leisure.
"Now that you have accepted your place, it is only fitting that you should bear my mark," he told her, deep voice rolling from his scarred mouth.
Arcee merely sat, unmoved by his statement. It didn't matter. None of it mattered.
"Do you renounce your former allies and swear yourself to me?"
The two-wheeler wasn't certain why he insisted on asking her. Her feelings were of no consequence. She already belonged to him... why bother considering her opinion?
Megatron was insistent, using a second digit to apply slight pressure to the plating that framed her face.
Panicked at the promise of pain if she did not comply, Arcee nodded, only allowing herself relief when he removed his servo from her entirely, a please grin splitting his features.
The blue femme kept herself as still as possible as she was quite literally branded, the shame that enshrouded her at all times deepening just a little more as she accepted the placement of his symbol without resistance. It was a symbol of his greed, hatred, and treachery, the downfall of their home world... and here she sat, terrified at what might happen to her should she refuse it.
She was a miserable coward and a disgrace. The fact that she had ever considered herself worthy to fight alongside the Autobots was laughable.
Megatron watched his medic work with precision, anticipation mounting. All of his efforts with her were coming to fruition, and when Knockout stepped away he moved into the space between them. He drank up the sight of her, helm bowed, frame tense, his dark insignia standing out boldly against the blue of her chest plating. Slowly he traced the outline with both his touch and his piercing stare.
"Leave."
Knockout blinked, processor taking a moment to recognize what had been demanded of him. It was a moment too long, as his lord's vibrant optics, now leaching an insidious violet, snapped toward him. Without hesitation he turned and exited the lab. Having previously witnessed how unhinged Megatron could become when the dark energon in his lines came to the forefront, he had no desire to be on the receiving end of his ire.
The Decepticon warlord paid his retreating medic no mind as he hastily exited, ravenous gaze returning to the object of his desire. Again he despaired over their lack of compatibility... yet he was quick to squash the disappointment. While he could not have her in such a way, there were other, far more terrible ways in which he could lay his claim upon her, methods that he had been withholding until the perfect moment, the final pin in her shackle.
Taking hold of her slender shoulders he moved her backward onto the operating table, his bulk looming over her, casting his wide, jagged shadow over her diminutive form. With a deft movement he parted the plating over her spark, the vibrant blue organ wavering beneath his sharp, wanting stare.
The first touch against her outer casing made Arcee arch up unwillingly, her helm tipping to the side as her optics slammed shut in humiliation and shame. She felt his mouth just above her audial, felt his vicious words crashing over her like waves breaking upon a cliff.
"Do you know how very long I have waited? How eager I have been to make my mastery of you complete? I will savour every moment of this..."
The distinct sound of his own plating shifting apart made her open her optics again, and despite her fear there was a brief moment of denial as she realized what he intended. How many hundreds of stellar cycles had it been since she'd last shared such an intimate bond with someone?
'Tailgate...'
The memory of her lost comrade and lover made a fresh wave of despair take hold of her, and for a moment the fight in her renewed. She thrashed, helm shaking, and his hold on her tightened, his frame pressing down over her, making movement near impossible. All she could do was beg. She stared him dead in the optics, lip components moving soundlessly over the plea.
'Please... please not this.'
His response was a mixture of both deranged delight and biting anger, his tone slicing her like a blade. "You will not stop me. You will take me into yourself, fully. The very essence of my being a part of you, and I... I will consume you."
Long forgotten, images of his face spun through her processor, recollections of the feeling of their union blooming in her like it was fresh and new. A cherished feeling, a warm, safe feeling. Everything that was his he'd given to her like a promise, a gift... and he took from her in a way that made her feel like the most cherished treasure in the universe. Two merged into one for a moment in time, it felt like eternity... like peace.
This... this was not the same. Megatron drew nearer, and as she felt the heat from his own spark graze against hers it sent frissons of horrible sensation racing to every part of her being. His greed twisted what was to be the ultimate act of mutual care. His spark shimmered with an unnatural purple light, which she recognized as the presence of Unicron's blood within his lines, rousing from dormancy.
No. No! She shook her helm, the only part of her still able to move as he hovered over her, wisps of dark energy reaching for her, licking across the minimal space between them. When they grazed the blue halo of light that surrounded her own spark it felt like... wrongness. Pure and utter defilement.
One of Megatron's wide servos released her shoulder and slid beneath her, pulling her up and pressing them together with crushing force. Their energies surged as one, and Arcee's mouth fell open in a silent scream.
"MINE."
Wicked, sinful pleasure raked through her lines, filthy, scorching heat ripping everything that she ever was from the very core of her until she felt empty and bereft, hanging limp in his hold while he drank her dry. And when she couldn't feel any more empty, he poured himself into her. Vile, hungry, grasping. It wasn't tender or irreverent. It was merely another form of domination. She felt herself spiraling, the severity of his essence burning her up, filling her to the brim, until she felt like she would burst. With one final surge of his dark and wretched spark against hers, she shattered, her tormentor pulling her so tightly against him she thought her frame might shatter as well. If only...
The Decepticon warlord held his prize close as he recovered, fanged mouth parting in a triumphant snarl. She was motionless in his grasp, so still and lifeless one might have thought her offline were it not for the light that continued to flicker from her exposed spark chamber. Sliding his armor back into place, he leaned back to assess her, stare lingering on that captivating glow for a long while before sliding up to her lovely face. Her optics were blown wide, unfocused and staring at the ceiling as she recovered from his vicious claiming. He noted with intrigue that their once clear azure were now limned with a deep violet.
Perfect.
Just a brief explanation about some of the acts that have been touched on throughout the story and the differences between them.
Interfacing vs spark merging: In this particular universe I have crafted based on both TF canon media and fan-based ideas, the acts are separate. Interfacing (or fragging) refers to the physical joining of frames which includes the valve/spike portions of their anatomy. As I've previously stated I like to view their species as 'fluid' in the way that all of them possess both organs, and can couple with any other Cybertronian, given their frame sizes are compatible. In this pairing it is very obvious that anything a mech the size of Megatron has going on would NOT be compatible with someone Arcee's size, hence why Megatron has not and can not engage in this act. Spark merging, while still very pleasurable, is meant to be an act shared between beings who care a great deal for one another, as it involves the joining of their very essences, and places all individuals involved in a very vulnerable position.
Please feel free to ask questions if you have any.