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ginger-lala · 13 days

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Deep Blue

Pairing: Sebastian Sallow x f!MC (Rosie Callahan)

Summary: Sebastian is dating a time-traveller from the future and loses his mind over modern underwear (or the lack of).

Warnings: p in v, oral m receiving, fingering, neck biting.

Words: 2.8k

Rosie and Seb's full story can be read here: Wattpad || AO3

Rosie made it to the Astronomy Tower first, making the Room of Requirement appear to suit her tastes rather than Sebastian's, though it was a hotly debated topic of whether Sebastian let her win the race or if Rosie was merely faster.

But she waited for him and they crossed the threshold together, revealing a room that was less like a room and more like a small, cosy cottage.

She led him to one of the comfy couches, pulling him down with her and rested her head against his shoulder.

"So, do you feel more relaxed now?" She asked, fingers gently stroking where she'd just been inflicting pain upon him earlier, massaging the sore spot.

"I said I wasn't stressed." Sebastian said, apparently still standing by his earlier comments.

Rosie laughed and pushed into his back once more, making him wince and let out a small hiss. "Hm. Convincing, you are."

She pushed him back onto the lounge and hiked her skirt up, straddling him and pressing a soft kiss on his mouth. "Well, I had an idea to help you relax further but, if you're not stressed... then I suppose you'll be okay."

Sebastian looked at Rosie like she'd just told him she'd murdered his much loved pet cat.

Sebastian cleared his throat, attempting to regain some composure, his cheeks tinged with a faint blush. "I.. uh, maybe.. Maybe I'm a... a little bit stressed still."

"Hm. I thought so," Rosie smirked. "Well, you complimented my mouth skills this morning when I caught the piece of bread so I thought I would show you what else it can do. Something I only learned about myself recently."

Sebastian gulped hard, feeling the lump in his throat bob up and down.

"So, shall I show you?" Rosie asked, a bloody devilish smirk across her cheeks.

"Y—yes."

Rosie smiled and kissed him deeply, letting her hands explore the back of his neck, travelling south and under the collar of his shirt.

Keeping her mouth firmly pressed to his, she dragged them down his front and began to loosen the buttons, freeing his chest from the confines of the cotton and giving herself access to the vast and slightly fluffy expanse of his broad chest.

Rosie let her mouth begin to wander, tracing delicate pecks down his jaw, to his chin, to his throat, stopping to worship the nape of his neck with a slightly harder kiss, making sure to take some of the skin in her mouth and sucking hard enough, sure to leave her mark on him.

But Sebastian didn't care.

This was not how he thought his day was going to go when he woke up that morning.

Though, Sebastian would never complain and he simply tilted his neck back to offer Rosie more free space around his throat.

She appreciated the gesture, letting the hand not exploring his chest trace around the back of his head, fingers tangling in his hair and tightening, making sure his head stayed exactly where it was, right where she wanted it. He grunted as she pulled a little, making sure he was fully aware that she was in charge.

Rosie carefully placed a delicate row of deep purple marks in a pretty little row, covering right down to his chest, stopping to kiss each one softly as she moved to the next, almost as if it were an apology.

She wandered lower and lower, her grip on his hair loosening as he let her hands trace down the front of him, making sure she traced delicately over his nipples, making him shiver.

She pushed open the shirt, finding a very obvious clothed erection in his pants.

Just like she wanted.

She smirked as Sebastian's dazed eyes peered down at her, curiosity written in his face as he waited impatiently to see what she had planned.

He didn't want to speculate. He didn't want to assume. But judging by the way Rosie was now off the lounge and knelt in front of him, he liked to hope it was going the way he wished it would. The thing he would often dream about when he was taking care of himself. It may finally be a reality.

Rosie palmed at the cloth that was keeping her from what she desired most, the gentle friction making Sebastian grunt. It was almost painful.

She smirked and undid the button at the top of his pants, giving her enough space to reach her hand beneath then and his undergarments, tracing the soft fuzz that extended from his belly button and down beyond the boundaries of his breeches.

She found what she wanted and gently wrapped her thumb and index finger around him, squeezing softly which made Sebastian's hips jolt towards her hand, almost begging for more.

Rosie let out a soft chuckle, watching him be completely at her mercy, completely melting in her hand.

"Surely... that's not what you planned..." Sebastian groaned, itching, desperate for more.

But Rosie was enjoying taking her time with him. She revelled in the control she had over Sebastian, smiling at the power she held as he squirmed beneath her touch. She continued to tease him, her fingers dancing over his throbbing desire. Sebastian's breath hitched as Rosie maintained her firm grip, the sensation almost torturing.

Rosie removed her hand, a pathetic moan leaving Sebastian's mouth at the loss of sensation. But she smiled and shifted his hips up, shimmying his pants and underwear down, lower and lower until they were pooled at his ankles. She leaned in, letting her hot breath brush against his cock.

She peered up at him, parting her lips and gently sliding out her tongue, not letting her eyes move from his for a second.

A low and desperate string of profanities spilled from Sebastian's mouth as he watched her intently, her head dipping low as she let her tongue trace along the underside of his dick, collecting the clear fluid that had begun to spill down his shaft.

And without hesitation, she took him in her mouth, nearly swallowing him whole, with a warmth that made him gasp. Sebastian's hands instinctively sought out Rosie's hair, tangling in the blonde locks as he surrendered to the pleasure he was so desperately craving.

He'd imagined Rosie's mouth wrapped around him before. He liked to picture what it would feel like, what she would look like with her mouth stuffed full of him. But nothing compared to the feeling he was experiencing right there and then in that moment.

The way her tongue caressed the tip each time she pulled back before pushing him deep down her throat. The way her lips became swollen and tears welled in her eyes as she pushed her own limits, taking him right down until there was no more to give.

The lewd noises she made with each outward stroke, the sounds of her gasping for air and moaning around him melting his bones and brain. He was complete mush. If she simply swallowed all of him, his entire body, he wouldn't care. At least he'd die a happy and very satisfied man.

He was at her mercy.

She increased her speed, hands gripping into Sebastian's thighs and nails leaving perfectly shaped crescent moon dents in his soft skin as he hit the back of her throat again and again.

"God, fuck... I'm gonna..." Sebastian groaned out, head lulling back against the soft cushions behind him.

Rosie let out a muffled moan of her own as Sebastian's grip on her hair tightened, his hips bucking to meet her movements.

"N... no..." He mumbled through clenched teeth.

Rosie's eyes flickered open just in time to see Sebastian's own eyes snap open. Yanking on her hair and pulling her off his dick with a loud pop, saliva dripping from both her mouth and his cock.

"What? You were so close... why?" Rosie panted, sitting back on her knees and looking at him with furrowed eyebrows.

"I don't want to come yet. Not without being inside you first."

Rosie laughed, biting her tongue to not correct him and say that he was already inside her, but instead she smiled, wiping the drool from her mouth with her hand as he reached down and grabbed her by the arm, yanking her to her feet.

He pulled her closer to him and let his hands wander up her long skirt, fingers dancing up her stockings, then her bare thighs until he reached the top of her underwear, realising they were like nothing he'd seen or read about before. "Are these...?"

"From my time? Yep," She smirked, her hands coming to a rest on his shoulders, finally able to admire the artwork she'd left down his neck and throat that was beginning to turn a deep purple.

Sebastian moaned out something indiscernible and rushed to lift her skirt, burying his head underneath to explore the new undergarments. His fingers traced the skimpy, lacey, dark blue material, letting his hands wander behind her, squeezing and cupping the soft flesh of her arse cheeks, noticing only half of them were covered by the garment.

"Deep blue? Really?" Sebastian chuckled, his voice muffled by the skirt pooled around his head.

"Well, it is my favourite after all. I know how much you love me in deep blue. Not that god awful green," Rosie laughed, inhaling deeply as he moved one hand back to the front and began to press against her core, pushing the moist, soft material against her heat.

He brought his head back out from under her skirt, his hair a sweaty and dishevelled mess, cheeks coated in a soft blush that had Rosie wanting to jump his bones right there and then. But Sebastian kept her standing upright while he looked up at her from his seated position, smirking as he gently nudged the soaking wet underwear to the side, slipping a finger deep inside her.

Rosie gasped, her hands gripping his shoulders for support as she felt her knees buckle at his touch.

Sebastian smiled, bringing her closer to him, wrapping his free arm around her waist so he could rest his head against her stomach. He added another finger, feeling her abdomen clench against his cheek as he worked his fingers in and out of her, exploring the depths of her pulsing desire.

Rosie began to lose herself in pure ecstasy, arching her back and completely surrendering herself to Sebastian, pressing all her weight down onto him. But he was unbothered, his smirk permanently plastered across his face as he continued to push her, each stroke of his fingers driving her closer to the edge, her deep blue panties now completely soaked through.

As her legs began to quiver and he felt her walls tightening around him, he withdrew his fingers and sank back into the lounge, pulling her down with him.

"Not yet," He cooed into her mouth, kissing her deeply.

Rosie simply let out a pathetic whine and melted into Sebastian's mouth, her body craving more.

He let a hand wander back to her waist and unclasped the button holding up her skirt and she helped him out, shimmying the skirt down and kicking it to the side without breaking their mouth contact once.

When her fingers slipped to the skimpy underwear, Sebastian snatched her wrist, dragging it away. "No. Leave them on."

He let go of her and dug through his pants beside him, finding his wand and casting the spell he'd now mastered on her before grabbing a hold of his cock, dragging it up and down the moist material before sliding them to the side and parting her lips, gently pushing his hips upwards.

They both let out a synchronised moan as Rosie sank down, meeting his upwards thrust until he was fully seated in her.

Sebastian let his hands roam across her chest as she started to gently move on top of him, slowly rising on her knees before sinking down on him again. He forced open each button and shifted her blouse aside, realising she was wearing a matching bra. One that only covered the breasts like she'd explained to him once before.

"They're... even better than I imagined," He panted, watching her perfect breasts bounce with every movement. "I... wanna leave it on but..."

Rosie let out a small laugh between pants, guiding Sebastian's hands to her chest, sliding his hands beneath the matching bra.

Sebastian's fingers traced the contours and mounds of Rosie's breasts beneath the delicate fabric, relishing in the warmth and softness of her skin. The sensation of his large hands enveloping her sent shivers down her spine as she continued the rhythmic motions on top of him, feeling the coil he'd wound so tightly earlier beginning to tighten again.

"Fuck, don't stop!" Rosie cried out, pressing her hands against his chest, her fingertips curling into the soft skin.

"Oh, I wouldn't fucking dream of it, love." Sebastian grunted, thrusting his hips up to meet her movements while taking care to continue his gentle caress of her breasts, the explicit sounds of their romp filling the room. The lounge beneath them began to creak as their synchronised movements drove them closer and closer to the edge.

And with a few more powerful thrusts, Rosie's walls clenched around Sebastian, her body shaking and twitching above him as her nails dug hard into his shoulders.

Sebastian's own climax followed quickly, the squeeze of her around his cock becoming his undoing.

Her name rolled off his tongue followed by a filthy string of profanities as she continued rocking on him, taking each shoot of warm load within her.

"Fuck..." She panted, sinking her head into the nape of his neck to catch her breath, delicately kissing the tender spots she'd left on his neck. "I hope... you have... a scarf..."

"Rosie, it's Spring..." Sebastian said, finally letting his hand reach up and touch his neck.

It was tender.

"Is it bad?" He asked, turning to meet her gaze.

"Uh..."

"Primrose. How bad?"

"Look..." She said, finally having enough strength to climb off him, slipping her underwear back in place. "It's not... great..."

Sebastian groaned, though he wasn't truly mad. He'd never be mad at Rosie for showing him how passionate she was, how much she loved and how much she wanted to mark her place on him.

If it weren't so taboo, he'd wear the marks with pride.

Sebastian supposed he'd simply be doomed to a week of wearing a scarf despite the weather growing warmer by the day.

The room had transfigured itself in a way that resembled a complete home when Rosie approached it hours earlier, and Sebastian was suddenly grateful it was Rosie who'd won the race to the Room because it contained a bathroom, complete with a shower large enough for two and a spacious bath, both adorned with various soaps and romantic candles. Something his dumb male brain would have never thought of. And to really set the mood, a large fireplace sat in the corner, casting warm shadows across the tiled room.

"Come on, let's wash up." He directed her, scooping her up bridal style and placing her down on a stool in the bathroom to save the mess he'd left in her from dripping all over the floor.

He opted for a bath instead and drew the water, taking it upon himself to remember every romantic thing he could, conjuring some rose petals and scattering them in the bath with a similarly scented soap on standby.

Sebastian refused to let her walk, scooping her up once more and placing her delicately in the bath, pampering her like she deserved after such an effort.

"I can wash myself, you know..." Rosie said, though she sounded half-asleep as Sebastian pressed her back against his chest, running his fingers through the shampoo he'd lathered in her hair.

"I do," He said with a smile, "But, I want to do this. You worked hard. I want to thank you."

Rosie scoffed back a laugh. "Please don't thank me for having sex with you."

Sebastian chuckled, pressing soft kisses on her neck, delicately and not like the ones she had left on him. "I won't. But, I'll thank you for loving me how you do. I don't think I deserve it but I appreciate it deeply."

Rosie sighed, leaning back against Sebastian's chest. "You deserve more than what I can give you. You deserve everything you want and I'll continue to tell you that every day for the rest of your life if I have to. I love you, okay?"

"Okay," Sebastian sighed. "Come on, let's get this shampoo out so I can hold you to sleep."

He helped rinse out the rose-scented soap from her hair and body and wrapped her in a warm towel, refusing to let her feet touch the ground and carrying her to the bedroom next door.

Sebastian laid her down on the plush bed and pulled back the bed sheets, moving her towel and tucking her in so she was warm while he did the same, sliding in beside her and holding her close.

"I love you too." He whispered in her ear, caressing her hair until he knew she was in a deep and well-deserved sleep.

#hogwarts legacy fanfic #hogwarts legacy #sebastian sallow

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