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Home Invasion
[‼️Warnings‼️]: Impersonation, Non-consensual touching / Dubcon themes, Pregnancy tension ,Obsessive behavior Stalking / Emotional manipulation, Identity confusion / Multiverse horror, Alternate! Mark Grayson, Psychological + light body horror, Delusional possessiveness, Implied violence & dread
-If any of these themes upset you, skip this one, babes. Don’t say I didn’t warn you-
Word Count: 1.9k+ words
Next Variant
The sauce was starting to burn.
You didn’t notice.
Mark had told you to stay inside. Said there was something brewing—big, dangerous, world-ending big. His tone had been different this time. Scared, almost. You hadn't seen him scared since the Viltrumites showed up the first time.
He left with a kiss on your forehead and a trembling, “Wait for me.”
That was three days ago.
So when the knock came—firm, purposeful—you rushed to the door without a second thought.
And there he was.
Or… something like him.
“Mark?”
He nodded once, slow. His suit wasn’t the one he’d worn last. It was yellow and black, sleeker, almost tactical in design. Harsh lines where there used to be curves. It looked like something someone wore to hunt gods.
And the goggles.
Opaque black. No eyes. No reflection. Just your stunned face looking back at you in tiny warped pieces.
“…Where’ve you been?” you asked with a soft smile. “You look like you came out of a war movie.”
He stepped inside without a word, and you took a breath as he passed. His scent was different—same cologne, but… colder. Like he'd been flying through ash and fog for hours.
“I was just cooking,” you said, closing the door behind you. “I made spaghetti. With too much garlic, because apparently I��m trying to kill you slowly.”
Still nothing.
You glanced at him. He was standing in the living room, looking around like it was foreign. Like your home was a museum exhibit he used to live in.
You forced a laugh. “Okay, I know the silence thing is new. Did you lose your voice? What’s with the mysterious vibe?”
“I’m just tired,” he said finally. The voice was close, but a shade deeper. Rougher. Like gravel under honey.
“Yeah. I figured.” You walked over to him and gently reached for his hand. “You want to talk about it?”
He didn’t pull away. His fingers closed around yours slowly, testing the shape of you.
“We’re safe now,” you said softly. “You can rest.”
He nodded again. “Safe.”
Your other hand rested on your belly. “She kicked today.”
At that, his head tilted slightly. Like the word "she" was a code he couldn’t crack.
You smiled. “Hard, too. Like she was mad you were late.”
A pause.
“…She?”
You nodded. “I haven’t gotten it confirmed yet, but it feels like a girl. Deborah. After your mom. What do you think?”
He didn’t answer. His head dipped slightly, the way Mark did when he was overwhelmed. He stepped closer, slow and reverent, until his hands were resting gently on the swell of your belly. You could feel the tension in his arms.
“She’s strong,” he whispered.
“Like her dad.”
A strangled sound left him. Maybe a laugh. Maybe a sob.
You smiled and leaned up, pressing a kiss to his cheek. “You hungry? I think I scorched the sauce but I can salvage it.”
You turned, heading back toward the kitchen, but his hand caught yours and pulled you gently, firmly, back toward him.
His hands slid around your waist. His lips brushed your neck, jaw, cheek. It felt… familiar. Comforting.
Until it wasn’t.
“I missed this,” he murmured. “You. All of you. No one else ever mattered. Just you.”
You smiled softly, cheeks turning a pretty red. “You’re so sweet baby...”
Flustered, you turned away from him and spoke again. “Hungry? I may have burnt the sauce, but I can fix it.”
You turned toward the kitchen, but his hand caught yours. Firm. Insistent.
Mark's arms circled you, pulling you close. You felt his lips, his mouth as it traced your neck, warm and familiar.
You closed your eyes, breathing in the scent, the closeness. Relaxing into the hard, firmness of his muscles underneath his suit.
His hands slid beneath your shirt slowly, fingers pressing softly on your skin as if afraid to hurt you…Then they grew bolder, sliding up to your swollen breasts, kneading them underneath your bra. Your pulse raced as you let out a small whimper of enjoyment.
He bit into your neck then, sucking your flesh and bruising it as he pressed his hips into you, the outline of his cock rubbing between your butt. You moaned softly and he growled into your ear, turning you around and kissing
You responded eagerly, your hands weaving into his hair, savoring the moment. It had been a minute since the two of you had REALLY engaged in anything too intimate.
The world narrowed to heat and touch, your shared movements becoming more urgent, more insistent and intense. Whispered how much you'd missed him those three days he was gone..how much you loved him… Then, slowly, the kisses slowed—became calculated.
His grip tightened—not on your waist, but around your throat. When had he gotten there?
Your eyes snapped open and you let out a chirp of uncomfort and slight confusion as you looked at him. Because Mark would usually ask before trying something new while they were being intimate.
And as the dizzy high faded she began to realize that… something in his kiss felt…off. Like he wasn’t savoring, but studying. Memorizing. "O-Oh Mark..?"
He didn’t lift his head. The black lenses hid his eyes, his lips parted as he panted softly in front you.
His fingers dug in your neck just enough to claim, not kill.
A voice, low and harsh, whispered in your ear, a quiet giggle slipping from swollen lips, “Oh Baby…How gullible you are…You've always been like this..so cute and naive..I guess some things never change”
Your breath caught and you looked up at Mark.
"W-What..?"
“But here? Here you’re weak. Pregnant. Devoted.”
His hold crushed, steady.
“And you’re mine.”
His voice turned cruel, unhinged.
His lips pressed harder against your neck and you mewled, frightened.
"Mark, what's the matter with you? You're s-scaring me! A-And holding me too tight-"
You struggled against him, heart hammering as Mark's crazed smile slowly vanished upon hearing the fear in your voice.
The goggles reflected only your terror.
Then he said it.
“You’ll never leave me again. Not this time.”
You froze.
Your heart stuttered.
“…What?”
His hand tightened on your hip. “You’ll see. It’s better this way. I’ll keep you safe this time. I swear it.”
The voice was wrong now. Not just deeper. Unstable. Cracking under its own weight.
You slowly pulled back, his hands loosening on you.
“Mark,” you whispered. “Take off the goggles.”
He didn’t move.
“Take them off, Mark,” you pleaded, louder this time. "Please.."
Still, he stayed still as stone
You stepped away, slowly, heart pounding so loud it drowned out the bubbling pot behind you. You felt your heart hammer in your chest as something in your mind screamed that this man in front of you was NOT Mark.
“W-Who are you…?.”
“I am yours,” Not-Mark hissed suddenly, the calm, cruel facade fracturing. “ As you are mine. In this universe and the next.”
Your blood ran cold. 'This universe?' What the fuck??
“What—”
“In my dimension,” he cut in, stalking toward you slowly, “you left. Or TRIED to leave. After I did what had to be done. After I made us safe. You said I scared you. Me. After everything I sacrificed for YOU. After I HELPED you when Dad tried to kill you.”
You backed up until your spine hit the counter, your eyes wide with fear.
“I loved you,” he said, the words shaking, voice filled with raw and bitter emotion. “I killed Mom for you. Killed Nolan. Killed everybody. EVERYBODY for US. And after all we'd been through… You said I wasn’t Mark anymore. You said I was sick. Crazy…EVIL.”
You grabbed the knife from the cutting board where you'd been cutting garlic.
“And maybe I was,” he breathed. “ Maybe… B-But I got better. I got better, Baby. Had only killed about 0ne hundred people before Angstrom came and captured me and the other variants. And when Angstrom told me you were alive out here, that your Mark had managed to keep you alive and even MARRIED you? I knew That I could have you…WELL, I almost believed there was some higher being up there… And who would've thought I'd not only find you…But here you are… Pregnant. Alone. Waiting…Just for ME~”
His voice broke into a twisted, malicious grin and giggled gleefully.
The pot beside you began bubbling over, the smell of burnt marinara sauce filling the air. You trembled with anxiety and fear as you brandished and held the knife in front of you. "P-Please…I'm not…I don't know what happened to you…or who I..I was to you in your…ah.. dimension…But I…I'm not yours…M-My Mark is going to come home and if you…if you hurt me…I guarantee-"
You were interrupted by the sound of him giggling again before exploding into full blown maniacal laughter. Like you'd just said the funniest thing in the world. When he finished he sighed and watched as you trembled, one hand holding the kitchen knife and the other holding your belly protectively. So cute…And so dumb.
“ I wouldn't dream of hurting you…Not again…Not when I've been granted a second chance to claim you…No…No…I think I'll be taking you now… Because at the end of it all..You're mine. And you'll ALWAYS be mine. In every universe. No matter what… And Your Mark? He's probably dead by now..The other variants aren't as calm as I am...In fact..If he isn't dead yet..he'll wish he was soon."
You didn't have time to respond, the smell of burnt food filling your nostrils and making you weak. Weak and distracted enough for him to act.
Didn't have time to react as he lunged, a maniacal smirk painted on his face.
You screamed.
Idk guys...Between college and panic attacks.. I gotta hyperfixate on smth-
Should I do a part 2?
#invincible fanfic#mark grayson x reader#dark mark grayson#yandere mark#multiverse fic#pregnant reader#psychological horror#fic warnings#obsessive love#angst#sukunascript#sinister mark#sinister invincible#sinister mark grayson#alternate mark grayson#variant mark grayson#invincible#AU#Reader x Mark grayson#You x Mark grayson#omni invincible#invincible universe
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