Love At First Bite

Supernatural Crossover

Sirius/Remus, Regulus


Characters briefly appear. No knowledge of Supernatural is required to understand this fic. Only that in the show, the full-moon transformations happen for three days, not one.

There is a small Supernatural spoiler for season 9 towards the end with Garth, though the episode events don't happen here as they do in the show.


As usual, italics are flashbacks.


Sirius ignored the pain in his head, the throbbing ache that tried to lure him back into unconsciousness. Instead, he forced himself to stay awake, testing his body, working out where he was and how he could get somewhere safe.

He pulled at his hands which were twisted behind his back. Ropes. He began to move his fingers, hoping that he'd be able to undo them before whatever attacked him came after him.

Sirius' eyes began to adjust to the room around him. He looked at the other two who were tied up, both still unconscious, and he struggled against his ropes even more as his eyes moved frantically around.

Their prison looked to be some sort of warehouse, and Remus being tied up beside him made him realise that he was wrong. Remus wasn't the killer after all. He was just another victim.

Regulus had insisted that the mark that they had seen when Remus' shirt had pulled up slightly had been a Werewolf bite. Remus insisted it was a dog.

And now they were in a warehouse together, one that stunk of blood and had dark stains on the floor. He had found the base, and he hoped Regulus arrived in time.

...oOo...

"Hello, I'm Agent White," Sirius said smoothly, flashing his FBI badge in the man's direction as the door swung open.

"Is something the matter?" the man asked, eyes widening at the sight of the badge.

Sirius nodded. "I'm here about a wild animal that has been spotted locally - close to this building, in fact. Can I come in?"

The man quickly moved aside, allowing Sirius entry. His eyes quickly moved around the room, searching for any indication that this man could be a Werewolf but found nothing.

"A wild animal?" The man looked alarmed at the idea. "And the FBI are dealing with it?"

Sirius nodded. "We're involved," he lied. "Though it's classified, I'm afraid." He watched the man closely for a reaction, but there was nothing to indicate that he could be the one behind the attacks, that he could be the one that Sirius was looking for.

Well, he wasn't the Werewolf that Sirius was searching for, but in a dorky cardigan, with hair that could do with a trim and adorable amber eyes, maybe he could be something else that Sirius was searching for…

"So Mr…"

"Oh, I'm sorry. I'm Remus Lupin," the man said.

"Mr. Lupin, I'm going to leave my card. If you can listen out and make sure that you stay safe. Also, if anyone else lives here, can you tell them… or would you prefer I return and explain?"

"Oh, it's just me," Remus stated. "How dangerous is this animal? I tend to walk into town often. I work at the local library."

"There are only reports of the creature at night. I'd say it was safe in the day," Sirius assured him. Remus put the offered card into his pocket, and Sirius grinned.

"So, if you hear any howling, or see anything strange - no matter how strange, or unrelated it may seem, call me - day or night."

"You mean apart from the howling that happens next door?"

"There's howling next door?" Sirius' fingers moved to the gun, and he turned to leave quickly.

"Oh - I was… I was joking. I… the couple who live there… the noises they make. I mean, they have a very…" he trailed off, a blush working its way up Remus' neck and on to his cheeks. "A very active sex-life. They do more than howl!"

Sirius couldn't help but laugh at the embarrassed expression on the man's face. "I doubt that you're the silent type," he replied, grinning widely.

If anything, it caused the blush to deepen on the man's face. "I… uh, of course I…" he trailed off once more, not sure what to say.

"Well, maybe you should do some howling yourself? At the very least, they'll realise how thin the walls are and be quiet… though you may just spur them on." Sirius winked at Remus, who seemed to have temporarily lost his ability to speak. "Sorry, that's very unprofessional of me. But any time you need me, day or night, call!" With another wink, he turned to leave.

...oOo...

A groan from next to him caused Sirius to look around. "Remus?" he murmured. "Can you hear me?"

"Bloody hell, what happened?" Remus muttered. Sirius watched him struggle with the ropes before panicked eyes were turned on him. "Orion?"

"I'm right here. I… Remus, I don't know what's going on here. Just keep calm. Now, can you twist your wrists to untie the ropes? Go slowly now. I'm hoping yours are looser."

He watched Remus' face as the man struggled against the ropes binding him. "Orion, where are we? I… the ropes aren't loosening at all. I can't twist my wrists to untie them."

Sirius murmured words to keep Remus calm and to make sure Remus continued fighting against his ropes, as he fought against his own, his fingers barely brushing the tied knot.

A door swung open at the other side of the building, leaving a small light from outside. It closed again after a second.

"My brother will find us," Sirius said. "But just try to get out of the ropes."

"Fenrir?"

Sirius froze as the man moved closer. It was clear by the predatory way he walked that there was something inhuman about him.

"Fenrir, untie us quickly," Remus called. "Before…" he trailed off as Fenrir smiled cruelly.

"Pup, why would I untie you before the fun starts?"

"Pup? I… why are you calling me…"

"Because you're just a pup - a young Wolf. Your second transformation."

"I… don't understand? I'm not a Wolf, look at me. I'm… Orion?"

Sirius was still pulling at the ropes. Second transformation which confirmed that Remus had been the one to transform the previous night, sneaking out of the bed that Sirius was asleep in.

It meant that when he had met Remus the month before, Remus hadn't been a Werewolf - therefore Sirius had failed to protect him. Therefore, Remus' Lycanthropy was Sirius' fault.

"I'm so sorry, Remus," he choked out. He knew that if they made it through the ordeal alive, Sirius would still have to kill Remus.

He'd have to put a silver bullet into the man, who, in twenty-four hours, had become the light in Sirius' bleak and miserable existence.

In all his life, Sirius had never come close to falling for anyone, until Remus Lupin. He didn't know if he had it in him to kill his lover. His head dropped, unable to meet the eyes of the two Werewolves.

"I brought you here to learn control," Fenrir Greyback growled. "To enjoy the gift I've given you. I chose you to be my mate and you… you betrayed me with a hunter!"

"Hunter? Mate?" Sirius listened to the confusion in Remus' tone, but couldn't find the words to explain, because that would lead to Sirius admitting that he would be putting a bullet into Remus, and he couldn't bring himself to think about that.

"Mate. Werewolves claim mates, and I've chosen you. When we transform, I'll bite you, and you'll be tied to me." Greyback's eyes shifted to Sirius. "Even though you got us caught up with a hunter. He's here to kill me: that's what his kind does. Once I'm dead, he'll kill you too. You're just a monster to him."

"If I'm anything like you, then I'll let him kill me," Remus spat in disgust, but Sirius could almost feel the fear emanating from Remus.

"It'll take you longer to shift," Fenrir murmured, not listening to Remus' words. "Your body will fight against it at first, where my body accepts the gift I was given. Once I've fed," his gaze shifted to the third prone body, "me and you will feast together."

His gaze moved to Sirius once more.

"No! You can't hurt them! I'll stay here, but please let them go! Don't hurt Orion!"

"No, Remus, we'll get out of this. My brother -"

"Your brother is going to get a visit from a couple of members of my pack," Fenrir growled. He looked up towards the ceiling. "Can you feel it? Can you feel the power of the moon? Can you feel it in your bones?" He headed over to Remus, loosening the bonds. But before Remus could do anything, the man had shifted.

Shaking hard, Remus rushed over to Sirius, his fingers desperately pulling at the ropes. "I don't know how he managed to undo the ropes," Remus muttered. "I need a knife. Do you have one?"

Sirius nodded. "My jacket."

Remus rushed, fumbling with his jackets, ignoring the screams of the now awake man. Even if he had the knife, there was no way to save the stranger. He could save Sirius and use the knife on the Werewolf and hope that he killed Fenrir, or even injured him enough for Sirius to finish him off.

After all, he wasn't coming out of this alive. He knew that now.

Sirius couldn't take his eyes off the other man as he was dragged from where he had been slumped, unconscious. The man had woken up quickly as teeth sunk into him, ripping at the flesh on his side. Blood coated the wolf's snout as he began to tear chunks out of the man's flesh, enjoying the screaming that he was causing.

Sirius felt completely sick. He had seen some disgusting things before, but never like this!

The screaming stopped, and the man's' glassy eyes stared unseeingly in their direction as the wolf lapped at the puddle of flowing blood. The body had been mutilated by the time Remus had cut him free.

It had only been a minute.

"Run," Remus shouted, falling to the floor. "Get out!"

Sirius looked towards Remus, before looking at the door. The moment Remus transformed, he would attack Sirius - but Fenrir Greyback would see Remus as his pack, so Remus would be safe.

But Fenrir wanted to mate Remus. They'd be tied together forever, and that thought made him sicker than the body on the floor did. He reached for the gun and pulled it out.

If he could shoot Fenrir before Remus transformed and trap Remus in the warehouse then deal with Remus the next day...

Before he could shoot, Fenrir leapt and knocked the gun from his hand. Sirius let out a pained cry as teeth sunk into his hip, tearing at the flesh. He could feel the infection enter his body, burning in his blood.

Not that it would have time to settle - he'd be dead in a minute.

The pain subsided and the weight disappeared all in an instant. Sirius glanced around, noticing a smaller brown wolf diving on the larger one, jaws clamping around its throat.

Remus had used Fenrir's distraction to his advantage.

The larger wolf tried to fight the smaller one off, but Remus fought. Sirius tried to keep his eyes open to watch, but they slowly closed as the blood flowed from the violent wound and the burning took over his body.

...oOo...

Sirius' hands ran over the scratch marks on the wall as Regulus stood back, watching.

"I know a Wolf couldn't get into the building, but I have no idea of how they got on my door-frame. I didn't even hear anything, though I'm a very heavy sleeper," Remus explained.

Sirius shot Regulus a quick glance. "Wolves tend to mark their territory," he explained. "Mr. Lupin, there's a chance it may come back."

The man paled. "What should I do?"

"I can suggest that one of us stay here with you to keep you safe. The other is going to hunt the creature."

"Alone?" Remus stated. "I'll be safe here alone. You shouldn't go after it by yourself. I'll -"

"Don't you worry, Mr. Lupin. We're trained to deal with these sort of situations."

Remus nodded his head. "As long as you're sure."

"I'll be back before dark," Sirius said.

Once the door was closed, Regulus leaned close. "He's hiding something," he murmured.

Sirius shook his head. "I met him last month and saw inside his apartment. He's not who we're looking for, but he may be a victim. Did you research the markings?"

Regulus nodded. "On the rare occassion, Werewolves pre-choose their victims - the more deadly ones that are more aware and bloodthirsty."

Sirius paled. "So a human could have made these marks?"

"In the beginnings of his change or at the end," Regulus said, nodding

A few hours later, Sirius was sitting on Remus' sofa, sipping a cup of tea. Music was playing in the background, but Sirius couldn't stop smiling at Remus.

The man didn't talk much, but everything that passed his lips fascinated Sirius. Before Sirius knew it, it was evening.

"So…" the man blushed adorably. "Will you be comfortable on the sofa?"

"What? Oh, I'm sure I'll manage," Sirius replied.

"Because… because I've slept on it before, and it's given me a bad back."

"Well, I have no intention of sleeping," Sirius murmured, wondering what the man was getting at.

The man looked relieved. "I'm glad we're on the same page here," he admitted. "Is there a law against seducing an FBI agent?"

"Seducing?" Sirius began to say, but lips meeting his, stole the words away. He couldn't deny that he hadn't thought about making a move on Remus; that he had planned to make a move before they left town.

"So the sofa will hurt my back?" Sirius murmured as lips trailed down his neck. "Want to show me where you think I should sleep?"

The pair barely let go of each other as they walked to the bedroom.

...oOo...

Regulus stumbled through the door, noticing a wolf pacing up and down the room, snarling at both the body on the floor, and the other wolf. He stumbled closer, his gun raised.

"No! He didn't… he saved me," Sirius shouted, blood soaked t-shirt tightly held to the mark on his hip.

"But he's a…" Regulus let out a sound that was closer to a sob than Sirius had heard from his younger brother for a long time. Regulus reached for his shoulder, where blood had soaked through his shirt. "Sirius, you have to kill him and me."

Sirius shook his head, paling at the idea, as he realised that he wasn't the only who to be bitten that night. "Remus didn't kill anyone. He was bitten outside of the full-moon. It's his second transformation. There has to be something we can do." His eyes locked onto Regulus' shoulder. "Were you..."

"There's no cure!" Regulus said, hating the fact more than ever, as he took in the look on his brother's face. "I was. I killed the wolves that attacked me, but not before they got a bite in."

The wolf moved closer, sniffing at Sirius' hip, before tentatively licking at the wound. It circled around him protectively, eyes on Regulus. "Look, he's not even trying to attack you. He knows we're like him. We're safe right now. Can we get through the night and talk about this tomorrow?"

Regulus lowered the gun, watching the wolf wearily. "So what? We just wait it out?"

Sirius nodded his head. "At least give me a chance to say goodbye to him," he whispered. "Properly."

"We'll call Garth to do this. I don't think I can kill you, Sirius."

"And I can't kill you either. I don't think I can ever hurt Remus," Sirius admitted. "I think Garth is our best bet for this mess, even if he's out of the hunter life now."

...oOo...

"The bandage?" Sirius asked, his hand brushing against the top of it, over Remus' naked hip.

"I got drunk about a week ago and passed out, I think. A dog bit me."

Sirius frowned. "A dog -"

"My neighbour Fenrir - he woke me up in the stairwell, brought me up to my apartment," Remus explained. "He said it was his dog. He was very sorry. I've had a rabies shot just to be safe of course."

Sirius nodded. A week ago wouldn't have been a wolf, and Remus looked suitably embarrassed at the getting drunk and passing out story, and Sirius believed him.

"Your partner… you could be twins?"

"Brothers," Sirius admitted. "We work well together, so they assigned us partners."

Remus nodded. "Are we safe in here?"

"I sleep very lightly. If a wolf comes nearby, then I'll know about it. Are you ready to sleep?"

Remus shook his head. "I'm going to be exhausted in the morning," he murmured. "But it'll be worth it! Are you… when the wolf is caught, you'll be leaving?"

Sirius nodded sadly, wanting desperately to give a different answer. "I travel a lot for work," he admitted.

"If you travel a lot, do you think that one day you'll be back this way?"

"You can count on it… and you have my number. You could call me if you like?"

Remus nodded, reaching a hand out and running it down Sirius' side and across to his arse. "So, are you ready to go again?"

Sirius nodded. He knew it was stupid, getting attached to Remus after knowing him for almost no time at all, but there was a large part of him that was telling him to look in local states for jobs - to stay close.

He didn't want to leave Remus, and that feeling was rare because Sirius wasn't the type to want to stop or settle anywhere.

Not until that moment.

...oOo...

Regulus returned with a bundle of clothes as the curse came to an end, and Remus shifted back to human. His eyes widened at the sight around him. "What happened? I remember…" his gaze moved from the torn up body, to the dead werewolf. "I remember everything he said. What happened to me?"

"You saved my life." Sirius took Remus' hand in his own, not caring about the state of his undress. "I tried to take Greyback on. I couldn't let him make you his mate… not when you…"

"When I'm what?"

"When you are mine," Sirius murmured, pulling Remus close. "I tried to fight him, but he bit me. I think he was going to kill me like the other man, but you attacked Greyback and killed him."

"But I didn't hurt you?"

Sirius shook his head. "No, you licked my wound a few times and tried to cuddle up to me. You didn't try to attack my brother either."

Remus finally looked around, realising they weren't alone. He hid behind Sirius as Regulus approached with clothes. He quickly pulled them on.

"So… is your name really Orion White?"

"Sirius Black, actually," Sirius stated with a smile. "Regulus is my brother."

"And what now?"

"We're dangerous. We need… we'll have to call a hunter to… Garth will at least be humane about it - a quick clean shot."

Remus paled at the idea but nodded his head. "He was probably just a good man too. I don't want to become a monster like him."

"I'm so sorry, Remus," Sirius said. "Had I found him last month..."

"It's not your fault. You didn't make him attack me. I believed him when he said it was his dog, though how did he curse me outside of the full moon?"

"Witchcraft perhaps? Or maybe the lines between man and wolf are so blurred that he could transform enough to bite?" Regulus suggested.

"I want to know, Sirius. I told you to run, but you stuck around?"

"I couldn't let him take you as a mate," Sirius admitted.

"But you would have had to kill me either way. If you had run, at least you wouldn't be cursed."

"Even for a few hours, I couldn't allow you to be his. I didn't know what he'd do to you after biting you and making you his mate."

...oOo...

Sirius woke up to find the bed empty. He looked around in a panic, before heading into the living room. Remus was stirring a cup of tea with a spoon, looking shattered.

"Are you okay?" Sirius asked, leaning down for a kiss.

"I am," Remus assured him. "It's a good thing we went to bed so early. You fell asleep pretty quickly after that second time."

"Your eyes were drooping too," Sirius muttered. "So... night two was safe!"

"It was," Remus agreed.

"I need to check in with my partner right now, but I'll be back tonight?"

Remus grinned widely and nodded. "I look forward to it," he said. "Are you sure you have to leave now... if you could spare an hour, I was just about to take a shower."

"Yeah, an hour... of course."

...oOo...

The three men sat in Garth's living room, looking in shock between him and his wife as the man showed the bite mark on his own body and insisted that they could live with their new condition.

"I gotta say, Garth. I wasn't expecting this. We knew you found a girl, but we didn't even think that there was any more to this!"

"We have a pack here," Garth stated, smiling widely between the three of them. "Sirius, Regulus, you've helped me so many times, you're like family! I'm sure that someone you care about so much must be really special. We don't hurt people out here. We're safe, I promise you. So, what did you do last night?"

"We went back to the warehouse and locked ourselves in," Sirius said.

"I was talking about the mark on your neck," Garth said, grinning happily at him. "First night as a Werewolf and you've already gotten yourself a mate!"

Remus smiled shyly as eyes fell on him, and he pulled the neck of his shirt aside, showing off his own mark.

"I'm just glad you called me and not someone else. Anyone else would be quick with the silver bullets, but I know that you can be safe with your condition. We have safe places for transformations set up, and the rest of the time, you can live a normal life."

"But we can't hunt anymore?"

Garth shrugged. "I wouldn't go far, and I'd stay away from other hunters. We don't want our pack found."

"But we can live? We can have real lives?" Remus pushed. "We're not going to end up like Fenrir?"

"Remus," Garth took his wife's hand. "Bess was born a Werewolf, and let me assure you, she's not like the Werewolf you've met. Her father is the local Pastor."

"Bad people become bad Werewolves," Bess stated. "We're against biting other people. We're good people, and Garth tells me that you're good too, so you're welcome into our pack."

"So I'll head back home, sell my apartment, and pack up my things. We can get a place out here... if you want?" Remus looked at Sirius hopefully. "If it's not too soon, that is."

"That sounds perfect. I'll come with you."

"I'll stay here," Regulus decided. "I'll get to know the place, meet everyone. See if there's any places for sale?"

Bess beamed. "I'll get one of the pack to show you around. James will be happy to do so. He's the local Deputy, he'll be able to help you out."

...oOo...

"Did you see the bite on his side?" Regulus hissed, glaring at his brother. "He's a Werewolf, Sirius. We need to take him out. If it makes you feel any better, we'll do this when he's changing and less human."

Panic filled him as Regulus left, heading back to their motel room for supplies. Sirius walked to the door and knocked, not sure what he was going to say to Remus. With no answer, Sirius tried the handle, finding the door unlocked, and let himself in.

In his distraction over the situation and his feelings, Sirius failed to hear the man walking up behind him. He called for Remus, but as the word passed his lips, a heavy weight hit the back of his skull and there was darkness.


Review Please :)

Thanks to Lynn and Firefly for betaing :)


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