I’m not a slow burn person. I cant handle it and @ladyanatares is pushing me over the edge with her fic. Now, mind you, I’m reading NYD UF! because I’m supposed to be making a surprise scene for ya’ll as part of this smut raffle… but I just finished Chapter 25 and, Lady, you’re driving me crazy…
So I’m going to punish Reader for not being like me. Because by now, I would have jumped Sans’ bones. Friend-zoned? Ugh, I can’t even play those games anymore…
So I made something a little dastardly. This ain’t canon, obviously, I didn’t make any of these characters from Toby to the Lady. But I can’t draw out my frustrations with fan art… so I’m going to write fan smut instead.
I hope you like it, Lady, because I’ve really been enjoying your fic (even if you’re an evil tease). This isn’t your smut prize, this is literally just an inspiration of what you made my mind do last night in retaliation for how that last chapter ended… So without further ado…
Rating: Explicit
Pairing: Gaster x Reader
Warnings: Dub-con, breeding, mental manipulation… because Gaster gets what he wants.
Also, you should probably read NYD-UF! Edition Chapters 1-25 first… just saying… And forgive me for any inaccuracies, I haven’t read the Gaster Timeline yet or anything beyond 25. This is just pure fan smut.
You knock on the apartment door, but Gaster answers it instead of Sans.
“Gaster? Where’s Sans. He said he needed to speak to me.”
“I think he’s done wasting your time, _____.” Gaster voice is smooth as his hands glide over your shoulders, removing your coat for you and putting it in the closet.
His words give you pause as you take in his own attire, tightly fitted pants with his usual turtleneck. But there’s something different… the room is full of candles and soft classical music is playing from somewhere.
Your mouth goes dry as you look back up at the Royal Scientist. You lick your lips and try to clear your throat as your heart starts to pound from his proximity and the realization that you could be alone. “Gaster…”
He reaches for your hands, pulling you further into the living room. You try to pull away, but his grip is too strong. You start to get angry, “Gaster, let go.”
“Ah, my dear, everything will be okay in a moment. Chara?”
Chara? You forget your struggle as the teen walks in from the kitchen. Her face is melancholy, her red eyes puffy as if she’d been crying.
“Chara are you okay?”
“Why did you have to friend zone him? Didn’t he tell you Gaster would only wait so long?”
What is going on?
“Chara, the Queen –”
“I know my mother’s orders,” Chara snaps back. “She reminds you her debt is paid after this.”
You begin to understand what’s about to happen and pull harder against Gaster’s grip, but your effort are futile. His eye lights lock onto yours and a purple fire burns inside his skull. You feel your body get heavy, like gravity holding you in place. You can’t move!
“My dear, I knew from the minute I saw you in my kitchen, that you were meant for me.”
“You knew it too, didn’t you _____?” Chara’s question is sullen but direct.
“Yes,” your pulse quickens under his grasp as you answer. His eyes look hungrily down at your chest. You blush at his desire… and the sudden onslaught of your own.
Gaster smiles, pleased with your answer, “A thousand years, I’ve never seen a human shine as bright as you, _____.”
Chara makes a rude noise. Gaster reprimands her. Why is she here? You’ve forgotten the reason you came here in the first place…
“_____ it’s time for me to go. I need to leave you alone, it looks like you…” is she crying? You can’t tell. You can’t stop looking at Gaster. He’s pulled you closer. His long arms wrapping around your waist. “You want to make children tonight.”
“Do you?” Gaster whispers, his face, now so close to yours, his arms tightening around your body.
“Of course,” your heart jumps as he claims his lips over yours. He lifts you bridal style towards his room. You vaguely hear the front door slam as Chara leaves. But your mouth is preoccupied with his tongue dancing with your own.
A thousand years… as he places you on his bed and skillfully begins to remove your clothes, you realize how experienced a man of thousand years would be. It makes you self-conscious at your own inexperience in comparison.
“Are you nervous?” His body, still clothed, hovers over yours now only clad in mismatched and slightly torn underwear… you hadn’t been expecting this.
…Why hadn’t you? This was your purpose… right? “I’m… embarrassing.”
“Nonsense, pet,” Gaster trails kisses from your forehead to your mouth. “You’re perfect.” His kisses continue to trail down your neck…
“The perfect age.”
Down to your chest….He removes your bra with little to no effort. Cupping your breast, you blush again as his long bony fingers elicit a moan from your lips. He lightly bites your sensitive nipples; a smile never leaving his skull…
… like Sans, his son with the perpetual smile…
“The perfect soul.”
…meant for him. You were meant for Gaster….
He continues his kisses and light nibbles to your stomach and below…
“The perfect vessel for my offspring.”
He removes your panties with a deft hand as his mouth plays a masterful rhythm on your clit. He hums in delight as your hands grab at his clothes. He lets you tear off his turtle neck revealing his rib cage… and a purple, dark silhouette halos around his… soul? A black upside heart floating inside his ribs.
He removes the rest of his clothes as you begin to moan from his mouth. You legs quiver against his thick arm bones. You feel him smile around you, proud of himself. Or of the entire situation? Since when did you allow a man so readily…
His tongue clears your mind with his skill as Chara’s words echo in your head… it looks like you want to make children tonight.
Her power… you needed to….
You feel his fingers start to circle your wet lips. You jerk you hips up, “Oh Gaster.”
… this need is overwhelming… Chara… what have you done?…
“You are… so pleasing,” his fingers tease you, their tips just barely entering you. You want to say something, but you can’t. You bite your lip as he spreads his fingers apart, stretching you while his tongue remains relentless in your pleasure.
“Your body is so obedient.”
Your heart skips a beat – with rage?- at his words, but your thoughts are quickly muffled by his fingers slipping further inside you, feeling the curve of your walls and then curling around the spot that has you moaning his name.
…meant for him… this is right… right?
For a split second you wonder if Sans and his brother are home, but then you push them from your mind. Let them hear you as you make them a sibling…
… that’s what you want to do tonight…
You cum, surrendering to his mouth as he continues to lick your shaking, pulsating clit. His fingers still inside you, you push yourself down around him more, burying his skull in your legs.
“More, I want all of you, Gaster.”
His soul sparks a bright purple at your assertiveness. “As you wish.”
One hand caresses your skin, slick with sweat from everything he’s already done. Your body feels like fire under his touch. His other hand takes hold of your thigh, lifting your leg up as he adjusts his body above yours.
He cups your face. The bones of his body cast an eerie shadow onto your skin from the light in his soul. “_____, we’re going to make the most powerful hybrids this world has ever seen.”
A new glow from below catches your eye, his purple magic forming a penis, fully erect and dripping with pre-cum as he angles it between your legs.
You feel a jolt of fear at what he’s about to do. It’d been a long time since you… and this was so sudden, wasn’t it?
His hand cups your chin and brings your eyes away from your bodies, and up to his eye lights. "Don’t worry, I’ll be gentle. I always take care of what’s mine.“
His…
His mouth claims yours as he pulls your body up to meet his. His tip presses past your lips. Slowly, he glides inside your wet, but tight vagina. He moans against your mouth as your walls squeeze around him. “I’d forgotten how pleasurable humans can be.”
You moan as well, but your breath catches as his girth becomes too much. “Let me in further, _____.”
He guides your leg further to the side, opening you wider. You cry out as he pulls himself back to his tip and then gently thrusts himself deeper. “That’s it. Good girl.”
The feeling of him filling you is overwhelmingly… good. You grab hold of his rib cage, pressing his bones against your skin, feeling the power of his soul flutter against your knuckles as he thrusts into you again.
Deeper. Just a little faster. You wrap your free leg around his pelvic bone, your calf fits in the curve of his bone as you try to push him further inside.
“You’re so eager, _____. A fitting mother of mages,” he punctuates every compliment with another thrust. “You’re so young… vibrant… you’ll bear me so many children.”
“Yes. Please. Fill me with your seed.” The thought consumes you as he begins to move faster, his desire spurred by your words.
“Give yourself to me, ______. Cum for me.”
It’s not a hard order to follow as his thrusts rub against your insides so expertly. A thousand years… your legs begin to shake and you feel a tightness in your chest, like your own heart was threatening to jump out. He moves your hands to the back of his neck, your fingers lacing around his vertebrae. You feel his soul kiss your chest through the bones of his ribcage.
You feel your orgasm building and as you lose your breath in its release, you see a brilliant red light between you even as you close your eyes. You feel his soul wrap around your own. His thrusts becoming wild as your bodies feel like they were merging into one.
You can barely breathe, the sensation of him surrounding you… consuming you… releasing himself inside you…
He cums with a roar that you never thought would come from his lips. A primal shaking rattles his bones as he collapses on top of you. The light disappears, both red and dark purple. He plants tiny kisses along your neck as his hand moves from your thigh to rub the skin just below your stomach, between your two bodies. “We did it.”
Your mind clears from the fog it was in. The reality of what you had just done… as he pulls out you and wraps you in his arms. You shiver, confused, exhausted, and… full of regret.
But Gaster sees none of his. His eyes are focused on your womb. His hand caressing your skin so lovingly…
So kind…
So wrong…
He kisses your forehead. That smile he’s been wearing all night, still unwaveringly proud. “And she is so strong.”
Dark Crystal Demon 