Pairing: Bayverse Optimus Prime/Tessa Yeager

Rating: Explicit

Details/Themes: Adult!Tessa (25-ish), xenophilia, comfort sex

Requested by Emiya Nagato

So many problems with her life; so many disappointments. After everything she had sacrificed, Shane left her. Apparently, he couldn't handle being among the Cybertronians even now that there weren't any threats left. It hurt like hell and now her home was suffering from not enough payments per month. They were a team but now, she had to do double jobs just to put food on her plate and survive. The only person she had to keep her on her feet was Optimus.

The Prime was more loyal than any human that walked the Earth and sometimes, she didn't even feel like she deserved him. There were so many humans he could go to who would give him a better place to rest than an old barely sizable garage in the middle of Houston, Texas. And yet, he stayed with her and never batted an optic towards his rather cramp sleeping quarters.

Banging her head on the table in frustration, tears ruined her mascara and stained her night shirt which did little to cover her underwear. A sniff from a sore nose made her frown but just after did she hear the familiar sound of the thumping of wheels below. Peering around her kitchen, a brief moment's hesitation conflicted her thoughts but she knew she had no other calling at one o'clock in the morning. Shaking her head after dozing off for two minutes, she quickly made her way down to the garage.

Turning the corner of the stairwell, a soft smile played on her tired face as Optimus lied on his belly in a rather squished position. "Can't sleep, Prime? Me neither."

Blue, darkened optics fluidly trained on her before a brief snort of air vented from his nasal plating. A moment of confusion dawned on him, "Why are you crying? Did someone hurt you!?"

Tessa shook her head, "No, no, I…I'm just a bit overwhelmed with all the bills and stuff. It's nothing to worry about."

"You are lying."

"Optimus, really, I'm fine," she sniffed.

His gaze pierced through her but his optics wandered to the side suddenly with another train of thought, one that made him close them and unexpectedly, his holoform appeared before her. It was a smaller version of his usual self but still large enough to intimidate the bravest of humans. She was barely to his chest but she had no fear towards him knowing how gentle of a giant he was regardless. She didn't even have time to react when he immediately pulled her into a hug and nuzzled the top of her head with a low purr.

"You are not fine at all. Your heart rate and pheromones are out of balance due to stress which I fear I cannot fix in the way I hope. But I can at least try to help if you will let me," he softly whispered.

Tessa peered up at him with a few more tears running down her cheek. "Make me forget the pain tonight, please."

He knew a good distraction but he didn't know if it was the right one. Optimus didn't know what he was thinking when he made the sudden move. In fact, was he thinking at all? She was human and he was…well, complications were unavoidable. But in this moment, this didn't occur to him. His arms tightened around her waist protectively as she responded to his action with a fragile moan and he failed to stop himself from taking this farther than he originally thought she would let him.

Swiftly, the Prime grabbed her legs and had them wrap around his hips while he began to explore her, pressing her against the garage wall. He hadn't had the time to do this with the other humans he grew attracted to but now there wasn't much to lose. A servo rubbed her belly before making its way to her mammalian gland which apparently held much attraction for humans despite being a common necessity for most of Earth's land creatures. He noted internally how she moaned when he went over one of the nipples through the annoying fabric.

As much as he hated that he was taking advantage of her, he wanted this and he knew it. So did she. He didn't object when she grabbed his helm and placed a rather dominating kiss upon his metal lips. While she was preoccupied with his head, his servos dipped under the shirt and one caressed her breasts while the other dove into more sensitive territory; a sweet cry of pleasure emitted as a result of the immediate use of a digit. She wanted to forget the pain, so be it.

Making sure she was holding onto him as he began to move his digit inside her, he slowly exited the garage and made his way to her bedroom. Her moans and the tightening of her legs around him caused a soft rumble to emit from his engine like a purr. As soon the bed was in view, he removed his finger and slammed her down on the covers before toying with her breasts once more. He pressed on the nipples when her hands shadowed his as an act of eagerness.

Looking down at his Tessa, he stopped, "I can take this further if you wish but only if you are willing."

"Optimus, fuck me!"

Optimus' optics narrowed in content and he immediately ripped away her clothes until she was a bare beautiful sight. He growled as his interface snapped open with little restraint, his spike unfolding just above her entrance. Sensing slight distress from Tessa more than likely regarding his size in comparison to a human male, his optics softened his lust into concern.

"If you are afraid, I will not enter you until you are ready," he calmly soothed.

Tessa giggled, feeling the metal ridges for herself, "I'm not afraid of you, Prime. I'm just wondering if I can fit all of it in me."

Peering down at himself, the Prime scoffed, "Time to find out."

Slowly, he entered her; he savored her gasp as she was stretched farther than probably Shane ever made her. A feral grunt escaped his vocals at the thought. Shane was puny compared to him, couldn't satisfy Tessa like he could and now she was his. Animalistic dominance roared through him wanting to claim her and rid her of Shane's stench. Cybertronians rarely liked to share their partners and if Shane ever came crawling back, his instincts would probably force him to challenge the man. If he was smart, he would run because fights for mates were often bloody if not to the death and he wanted on the inside to kill Shane for his betrayal of his Tessa.

He began to move with caution for a minute until Tessa grabbed the remainder of the spike unburied and urged him to go deeper. He couldn't fit all of it in her but three-fourths wasn't that bad. He jerked forward slightly a few times to embrace the newfound tightness which made a small but noticeable whimper leak out.

The woman patted his cheek, "Good boy, now show me what you can do."

Optimus didn't hesitate to start bucking with swift thrusts, clawing the bed sheets to the point where they were beginning to look as if they were ready to tear. Tessa, on the other hand, fluttered her eyes and arched from the movement, occasionally peered the large mass that was the spike nearly tear her in two. She hardly noticed the Prime lean to trap her legs and kiss her neck because the sensations of the alien dominating her were too much of a distraction. Whining as her body grew hot and heavy, she tried her best to meet his thrusts.

This was way better than any human she slept with; Shane would be jealous. The ridges of the metallic appendage rubbed against strained walls so sensitively that she swore she could just orgasm a thousand times with that alone. It also felt strange; it was a good strange that it was obvious Optimus was in her womb. Not at the very edge like some men could manage but actually inside it. The womb passage was probably not designed to take the stretch prematurely without some complications but her body had yet to complain about it.

He grew to a rapid pace, denta bared as he took her. Downstairs, they could both hear Optimus' true body's engine groaning with primal lust. At this point, the neighbors were bound to hear that. He slammed into her with little to no mercy contrasting his usual self. He knew he wasn't hurting her though, her sounds told him everything.

"Optimus! Oh, Optimus!"

"My dear Tessa, let me hear you sing."

A greedy smile edged onto his features as she screamed, shaking from the powerful orgasm as he still moved to chase his own. Her body started up again building onto her first climax while Optimus panted, optics bright with pleasure. As soon as they turned white, they dilated and the Prime snarled like a bull as his transfluid filled Tessa to the brim. Tessa followed again with a subtle arch of her back and a killer grip on his arms.

The real Optimus below had his engine and horn blare loud enough to shake the room and no doubt caused a major disturbance throughout the block. When it faded, it sounded like a growl as if he was a bit upset he had worn her out for the night...well, very early morning now.

Tessa breathed in, nuzzling his chest. "That was incredible! Thank you for everything."

The Cybertronian sniffed her pheromones while carefully brushing against her head with his faceplates. A small wayward smile presented itself as he chuckled lightly, "I am pleased you enjoyed it. You deserve to be happy, Tessa. I will make sure of it."

The human woman stayed in his embrace, eventually drifting asleep. Optimus took notice and refused to leave her side come dawn. He would stay to keep the pain away right to the end.

AN: Finally did it! I just got a job so this came in way too late but I did it. Optimus always hides his feelings but now that there's no obstacles, he has nothing to lose.