So I'm currently rewatching Supernatural and this little one-shot came into my head. I've been struggling with writing for over a year now since I swapped jobs but this one kickstarted something in my brain and I've spent the day writing it.

Tilly is an OC I made up for this little story and it doesn't really follow anything in the show so you can place it anywhere really after John's departure.

Disclaimer: I don't own Supernatural


She dropped the last ingredient into her cure; a vial of the blood of a mortal born immune to all things supernatural. It had been rather hard to track down and came at a high price. She'd spent the last day draining a demon of her blood whilst the boys slept. Tilly had captured the she-demon who'd been tormenting the local children's ward by taking over one of their coma patients. Whilst draining it, the Demon had mimicked her dead sister's voice but despite the emotional torture, Tilly managed to fill the two jerrycans, exorcise the bitch and burn the body. After all the real girl had been braindead for more than two years, it was releasing the poor girl really she was finally going with a reaper and Tilly hoped she got Tessa.

The blood curdled and bubbled letting off one hell of a stench that Tilly had to open one of the crumbling windows. They had stayed in many a shitty motel but this one was by far the worst. Needs must though, it was on a dead stretch of road in a thick wooded area and used mainly for drug deals. Most people were in and out within minutes and for large parts of the day the place was empty save the hunting trio. Tilly took the concoction off the heat and poured it into two jam jars. It barely filled a quarter of each, but it was enough to cure the boy's newfound vampirism.

Dean being the glutton he was had insisted they stopped at a little diner just outside New Orleans. It had that quaint home kitchen kinda feel to it that Dean had often longed for. He'd had some memories of their mother and her cooking. Both he and Tilly had gone for the Hunter's Chicken to be ironic or Moronic as Sam had joked. Sam had chosen the healthy option which turned out to be his saving grace. Two hours into the next leg of their journey the food poisoning kicked in. Due to Dean's quick thinking the Impala narrowly missed being covered in projectile vomit, Sam however did not. He played nurse to his brother and their girlfriend for the first day living off Red Eyes and chips but by day two Dean's condition had much improved. As Sam had pointed out it was likely to do with all the grease covered and partially cooked food Dean consumed on a daily basis. Tilly however paid the full 72 hour price; shakes, vomit, the shits and dehydration to name the worst. The boys never left her side taking 12 hour shifts and coffee shots to care for her. Though she admitted having a whole bed to herself for once was a small plus to a dire situation. The coffee though, had been the trojan horse.

A few years before she met Sam and Dean the duo destroyed a large Vampire nest a few states over. Having taken on such a large amount they'd missed one without realising and he'd never forgotten them. Ivan had laid low since, moving across the country to scope out a potential new family with new brothers to replace the ones he'd lost. He didn't want the Winchesters as siblings, but he did want revenge. What was sweeter revenge then turning them into something they hated? Maybe Ivan would then infiltrate their 'nest' and kill one of them just to show the other how it felt. On that second evening, he waited at the coffee truck and watched as the tall one ordered then turned his back to the truck and stretched. Ivan, posing as a customer with coffee in hand, made his move. He chatted with the tired server, dosing both coffees with a drop of his blood before she could realise. The tall Winchester turned back grabbing both off the counter paying no attention to Ivan, only thanking the server and walking back to his car. Ivan stayed for a few more moments after watching the car leave to not to look suspicious. He would track them in a few weeks once they'd suffered enough for his liking.

A week had gone by since that night and suffering was a kind way of putting it. But being Sam and Dean, they'd put all their anger and blood lust into curing themselves rather than sulking; giving in was not an option for them. Their priority however had been protecting Tilly from themselves. They had stayed in a different room and communicated only by text to avoid any persuasions their thralls might try against her. Though she'd missed them terribly, she'd had all the time in the world to research a cure and a hunt that would get them most of the ingredients she needed. Though Bobby had been on the other end of the phone when she needed, it had been strange for her going back to being a hunter working alone. Though she didn't want to admit it, she missed the thrill of researching, tracking and getting the kill. She was glad to know if something did happen, she was still badass.

Tilly grinned to herself as she left the blood concoction to cool on the side, it would need to be 37 degrees; body heat. Though they would try to drink it at its current temperature, the vampire in the boys would likely take over and try to find a better meal.
Its done, just needs to cool She text their Whatsapp group Roughly 20 mins and I'll leave it outside your door
The two ticks turned blue confirming one if not both of them had read it. She jumped in the shower scrubbing off all her dirty work. Dusk had settled and the side of the motel their rooms were on had already gone dark, shadowed by the forest. They boys would be able to open their door without worrying over the threat of sun.

The smell had mostly dissipated by the time she was out, so she closed the window. As she did something moved in the darkness, the shadows hiding its full form. Tilly frowned, shut the curtains and grabbed her Glock from the bedside table. She shoved it into her thigh holster which for once was uncovered. She was only wearing her black panties, matching PJ top and holster; most nights she wore the thing to bed, an old habit from her lone hunter days. The door handle moved before someone knocked softly. Tilly unholstered her gun, aimed and moved slowly towards the door silent as a cat following a mouse. The knock came again louder this time and Tilly blinked looking through the peepholes. Sam and Dean stood on the other side looking back at her.
"I said 20 minutes boys it's only been ten."
"We've been talking to Bobby." Sam replied smoothly "He thinks we should be ok, its only 10 minutes."
"Yeah." Dean piped up "Let us in Sweetheart it's been a week since we've seen you."
"Well then another 10 minutes shouldn't hurt you." Tilly responded stepping back from the peephole. The lore was clear that thralls worked through windows but most of the lore was written pre-peepholes.
"Don't you trust us?" Dean asked in a sweet tone she'd never heard before and definitely didn't trust. A noise from behind her in the bathroom made her swirl, Sam lingered in the doorway his 6'5 frame taking up the whole space.
"Shit." She cursed, the motel bathroom became waterlogged if she didn't open a window during her shower. Sam smiled, it was one he reserved only for her but right now it was full of lust, and she couldn't tell what kind. Sam's eyes moved over her shoulder and before she even turned she knew who he was looking at.

With quick thinking, she moved to the side into the little kitchenette, putting some distance between her boyfriends before they could box her in further.
"Bobby also told us some other lore." Dean began leaning against the table. His bare muscular arms flexing as he pressed against the metal surface "Did you know tonight is a blue moon? It's the second full moon in a month."
Sam left the bathroom and moved to sit on her, normally their, bed "It triggers mating season and vampires? They mate for life. Kind of like how a group of hunters become a little family wouldn't you say Dean?"
"Definitely." He agreed moving round the table to Tilly. She had no where to move to and she knew it. Her gun was loaded but with normal bullets rendering it useless. The idea of shooting the brothers, her boys, chilled her to the core but if she needed a distraction to escape… Dean captured her between the side and his body. He wasn't as tall as Sam but he was definitely stronger. His body was sculpted with muscle that indented his clothing "You know hunter's Tilly, once we get a whiff of something we like, we don't let it go." Dean grinned wrapping a big hand around the back of her knees and before she could lash out, threw her over his shoulder heading towards the bed.
"Dean!" She yelled kicking her bare toes against his stomach, pounding his back with fist and gun "Put me down!"
"I don't think so Sweetheart, it's been a long week without you."
"Sam please!" She begged as she felt his hands wrap round her feet to pull her down to him "Don't do this." She struggled as he tried to secure her on his lap. Ultimately, he managed. Tilly was stronger than most and fought dirty when she needed to but his vampire strength was a lot more than hers. Her gun skidded across the floor away from her, when did he even take it off her? Frantically Tilly covered her neck with her hands as Dean knelt on the bed. Instantly her legs moved to kick him in the crotch but Sam's hold on her was too great "Do not bite me! I have the cure, you can be human again! Please!" Her pleads were pathetic even to her own ears but they were all she had left.
Sam laughed behind her and tilted her face up to him not even trying to remove her hands "Tilly were not going to bite you." She heard the unsaid yet hanging in the air "We're going to mate with you."
"He means fuck you." Dean sighed at Sam's flowery language, somethings about them would never change. Dean grabbed a hold of her panties and tore them down her legs. She dropped her hands from her neck to try to try and pull her undies back, but he was too quick "We're going to fuck you and claim you as ours, but we have to do it tonight."

Cold air caressed her bare pussy and Sam's nimble hands started on the buttons of her night shirt, opening them quickly to bare her chest. Tilly lay bare minus her holster and trapped between the two brothers who definitely had lust radiating from every inch of them. This was nothing new, they regularly had sex this way but this lust was overpowering, their thralls corrupting her. Tilly felt herself get instantly wet and she could almost hear the grins spreading across the boy's faces, caused by a heightened sense of smell. Dean dropped to his stomach and lay between her knees. It was hard but she pushed through the haze for a moment.
"What happens once we're mated?" She asked knowing that there was no escaping now. She cursed Bobby Singer to hell. He knew what had happened to the boys, why the fuck would he tell them about mating? Dean, fed up with waiting, ignored her question instead choosing to attach her clit with his tongue. She choked out a moan and instinctively fisted his hair like any other session.
Sam pushed her night shirt further aside to cup and knead a breast "We'll be able to know how each other is feeling or in danger. We'll be able to sense each other at all times and want to be around each other." Dean sneakily pumped two fingers into her as he began to suck on her clit fervently. It pushed her to the edge so quickly and so hard that she missed Sam's second statement "You'll want to feed us your blood when we need it." They wouldn't drain her of course it wasn't like that, but she could give them help when they were stuck. Like tonight for instance, they'd been hungry for a week straight. Pure will had kept them inside all week.
"Dean." Tilly cried throwing her legs on his shoulder to pull him impossibly closer. She dug her heels into his back as he sucked harder in response. He let out a growl which vibrated his lips and flung her right over the edge. Sam tilted her head back to his and kissed her lovingly as she came down from her high. He didn't stop playing with the nipple clasped between his fingers, he was going to ensure she matched their appetite as long as she could. Dean reluctantly pulled his face from her entrance; he could have carried on all night listening to her shouting his name. He wanted to feel her tremble every time he came close to her body, but it was unfair on Sam. Vampirism was making him rather selfish but his connection to his brother was just that bit stronger.

When Tilly's shakes subsided, Sam let go of her breast. He was rock hard and desperate to get inside her. He rubbed his cock against her ass for some friction, smearing precum across her. In response she panted into his mouth.
"She still wet Dean?" His brother was equally hard and had wrapped a hand around his own cock for some release. Using his earlier hand, Dean slowly ran a finger up her slit.
"Fucking soaked." Dean had to speak up over the curse she yelled. He sucked the juice right off his finger staring at Tilly as he did so. If her eyes could have rolled back into her head, they definitely would have.
"Good. Who's first?" Dean held up his fist and arched an eyebrow, Sam got the gist right away "1.2.3!" Tilly stared in wonder, they were really using rock, paper scissors to decide who was going to 'Mate' with her first? Sam won; paper beating rock. He flipped her onto her stomach in front of him and pulled her hips up none too gently but out of excitement. Without hesitation he pushed right into her and seated himself fully. Where Dean was long and thin, Sam was still above average but thick.
"Fuck, Sam." Tilly sobbed ecstatically fisting the blankets beneath her. He set a rhythm instantly and because he towered so far above her, each thrust packed a stronger punch. Less than a beat later, two bare thighs came into her line of vision. She lifted her head to look at Dean with a questionable glance. He was fully naked save his little necklace; it never came off even though it regularly got tangled in her hair. He just gave her one of his smirks, one that made both women and men do anything he wanted without having to open his mouth. He brought his cock closer to her face and she licked her lips.
"Keep me ready sweetheart." He winked gathering her mass of hair into his hand and out of her face. She took him into her mouth slowly knowing she wasn't going to get the space to accommodate him that she would normally have. Another thrust from Sam pushed Dean further into her willing mouth. She choked earning her both loud moan and a throaty laugh from Dean. It wasn't a position they'd tried before. Looked like Vampirism was taking away what little inhibitions the boys had. She swallowed around him this time avoiding a choke; that made him cuss her name same time Sam did. She tried to clench round Sam, but his pace was too quick, and he soon had her distracted by his fingers rubbing her clit. He'd coated them with her wetness allowing them a much more pleasurable movement. Tilly whined pathetically sending vibrations right up Dean's shaft "Woah." He pulled out and released her hair quickly "Let's not end this before its begun." Sam took that as an incentive to speed up, pushing Tilly's back down to get a better angle. She turned her face to Dean who'd taken a chance to relax next to them. He cupped the back of her neck before kissing her roughly not that she was kissing back with any less desperation. She was holding onto the edge of orgasm with all her might. Another one and she'd be tired, a third would leave her in unknown territory with two hungry Vampires.

Sam let out a grunt of her name, rutted once more against her before releasing and pulling out. She sagged forward onto the bed easing her strained knee and legs, though pleased by the warm trickle going down her leg. She didn't get much time to breathe before Dean flipped her over onto her back and gave her abused pussy a quick slap like he always did.
"Dean." She screeched and bucked up towards his hand. With a smirk he gave her another before slamming right into her. Leaning over her, he pinned her wrists above her with his right hand and wrapped his left arm around her hip, yanking her body to his with each thrust giving her no time or space to adjust at all. His hip bone rubbed against her clit with every thrust, bringing her back to that cliff and determined to push her off. The earlier blow job had got him most of the way to his own and he was wasting no time in getting to the end. He earned a "Fuck." From Tilly with one particular swing of his hips and felt her whole-body clench and then shudder with her orgasm. Sam was suddenly next to her kissing and helping her ride out the aftershocks. It was something they always did for her, especially with their insatiable sex drives. One of them was enough, never mind two. Having let go of her wrists, Dean grabbed a thigh in each hand keeping her hips wide before quickening his pace. Tilly moaned loudly into Sam's mouth with a mix of pleasure and ache setting off Dean's orgasm. He pulled out of her after a few seconds, leaving a sticky mess in his wake. The sight made him grin before he laid down beside her.

Having control over her body again, Tilly pushed herself onto her elbows. She looked at Sam then Dean in turn trying to notice any differences in herself but there was nothing more than she felt before.
"Might take a few hours to notice the change." Sam acknowledged as pulling her to straddle his chest. He rubbed her hips and ass; two of his favourite areas on her "Do you want to sleep?"
"We've definitely tired you out." Dean chuckled shifting onto his knees beside them.
"Not yet." Tilly was dead on her feet, well knees, but they needed the cure as soon as possible "You guys need to drink that cure before it gets any colder."
"Oh that." Dean mused pressing his chest against Tilly's back. His hands moved round her front rubbing up and down her sides then across her stomach "Sam you had a look at that whilst Tilly and I were busy right?"
"Yeah Dean I did. It was a bit too cold, so I had to throw it down the sink." Tilly stared down at Sam who gave her his puppy eyes. It didn't work, she could see the grin behind them. She realised only then that they'd caught her between them again. Dean was kissing her neck and Sam was centimetres from her thigh.
"Don't." She pleaded but had assigned herself to the fate. She wondered if that was her 'mate' feelings.
"C'mon sweetheart." Dean mumbled against the junction of her neck "We're just a little hungry."
Sam pulled her a little closer "We'll be quick Til, you'll barely feel it."
"Might even feel good." Dean mused tightening his arm around her.
"You promise you won't turn me?" Tilly asked closing her eyes as they promised in unison and silently agreed with a nod.

"That was not what I was expecting it to taste like." Dean complained sliding into their bed "Vamps make it sound like drinking a freaking cheeseburger."
"Maybe its down to the guy they're eating." Sam shrugged stroking Tilly's hair. She'd fallen asleep before they'd finished drinking, the evenings events exhausting her. Whilst Dean showered, Sam had finally stripped down and laid in bed with her making sure she was fine "Do you feel like you're going to throw up?"
"Yeah its pissing me off man, didn't feel this nauseous when I had food poisoning." Another wave hit him but this time it wasn't going to stop. Blood splattered up the wall and like a scene from an old British comedy movie they'd watched once as kids, it kept coming.
Sam jumped out the bed "Dean! Whats-" He didn't finish, a projectile of blood same out of his mouth and soaked the floor. Neither could speak, between the two of them litres of blood, bile and God knew what else kept coming out for several minutes. Eventually Dean made it to the kitchenette sink whilst Sam to the bathroom one. On the bed Tilly smirked listening to the pure carnage around her.
"Sorry boys. Did I forget to say I drank some of that cure just in case? Oops, must have slipped my mind." The angry growls from both her boyfriends were confirmation enough. "You should be human by morning. Bobby asked me to tell you he says Hi Idjits."


A/N: If you want to imagine how bad the sick scene is for the boys, Youtube Guest House Paradiso Puke Scene.