Important information from the author
Chapter warning: This is an important one!
This chapter contains beastiality in the form of two werewolves and a dog animagus (yes, our trio will literally do it doggy style) there will also be talk of knotting. If any of that offends you then please skip this chapter, I promise you won't miss anything that won't be covered in later chapters.
I'll admit that I wasn't sure about adding this chapter but someone requested it specifically so I had to include it. Anyway, if you do read it I hope you enjoy it and, if you don't, I fully understand why.
Sirius slowly made his way down to the werewolf colony in his Grim form. It was the second full moon since they had arrived at Castle Black and he was determined to spend this on with his mates.
The last one had been difficult. Not only because Sirius had been helping to get the former Azkaban detainees settled but also due to the fact that Remus had been on Wolfsbane for so long. While the poison hadn't done as much damage as they had feared, it had still had an affect on Remus's system and Greyback had been worried about how the younger werewolf would react to his first change without any in his system and had consequently insisted that Remus have his first change in one of the cells for his first change off the potion as he was worried about stories of other wolves going feral when they came off the stuff and he didn't want to risk the colony.
Greyback had stayed with him though. He had claimed that it was so that he could assert his dominance as the alpha of the pack, so that Remus could join in with everyone else after that. Sirius knew that the other man, like him, was worried about what damage Remus might do to himself if left alone. It didn't help that Remus, himself, was worrying about the change and Sirius had been up all night in their rooms worrying over what state he might find them in in the morning.
Only it turned out there was no reason for him to worry at all, or at least not much of one anyway. He had gone down at the first light of dawn to open the cell, first aid kit in hand, only to find it was hardly required. Greyback had a few scrapes and bruises where it looked like he'd been flung against the wall a few times, still a somewhat impressive feat against the large alpha. Remus appeared completely unharmed, however, curled up asleep on the floor, purring happily with Greyback curled protectively around him.
They never explained exactly what had occurred to Sirius that night but whatever it was had caused quite the shift in the dynamics between the pair. Remus now seemed much more comfortable in his position as Greyback's submissive.
The trio had been spending time together, building their relationship and, when it was the three of them, or when Sirius was on his own with either of the others, but things didn't go so smoothly when it was just Remus and Greyback together. It had seemed that the younger werewolf still had a few hang-ups about the alpha and, as such, couldn't quite let go in the same way he could when they were all together. Sirius had been a bit worried about what it could mean for the future of their relationship, although he couldn't say that he had been completely upset by the fact that it had only encouraged the others to keep him as a central part of the group.
After the full moon, though, Remus was different, frequently cuddling up to the werewolf whenever they were together, and not just in a sexual capacity. It seemed as if Remus was always following the alpha around now, deferring to him in most regards and Sirius couldn't help but feel a little jealous, especially as Greyback, while not specifically encouraging the behavior, was not discouraging it either. Sirius had started to feel a little pushed out of their triad and he knew he needed to take steps to rectify it. The first one of which would be attending the next full moon with them. Greyback was a little wary of it, despite Sirius's insistence that he never had any issues when he used to run around with Remus back at school.
"He was your mate," Greyback pointed out, "plus the wolf was outnumbered. That won't be the case here. There are a large number of werewolves in the colony, none of whom have a connection to you and many of whom have never even met you. It is too dangerous for you to go out there, especially if any of them decide to view you as a threat."
"Won't they follow your lead though?" Sirius queried, not wanting to let this go. "You are the alpha after all, I thought your word was law."
"It is," Greyback agreed, "but that doesn't mean that I can't be challenged and if a fight breaks out you become an easy target."
"I think I can take care of myself!" Sirius huffed.
"I'm not trying to say that you're not a capable wizard," Greyback sighed, "but you have never had to face an entire pack before. I have, and I know how dangerous it can be. I don't want to lose you Puppy, or for you to get hurt."
"I get that, I do, but I can't help feeling that if I don't come with you that there will always be this barrier between us, this thing that you and Remus share that I don't. I've already been feeling jealous about how close you've gotten since the last full moon. It's silly I know but I can't help it."
"It's not silly," Greyback reassured him. "You can't help the way you feel and I'm glad you told me instead of letting it fester. Fine, you can come, but we will stick close to the gate and at the first sign of trouble I want you to make a run for it and don't look back. You need to promise me, Puppy."
Sirius had promised and Greyback had been vaguely reassured. Remus had also had his reservations and had promised to stick close to Sirius as well since Moony should recognise his animagus form.
Sirius was also told that he would have to copy what Moony did closely. Under the full moon the wolf would be led by instinct and would work to please his alpha in any situation. It was impossible to explain every eventuality so Sirius would have to mirror the other werewolf if he wanted to make sure he didn't accidentally cause a riot. The amount of stress both of his partners put on this fact didn't exactly fill Sirius with a sense of confidence but he made sure to hide any trepidation he felt lest the others try to talk him out of his plan again. He knew it was dangerous, he wasn't stupid, but while this cause of action might be dangerous to his life, not taking it would almost certainly be dangerous for his relationship and Sirius wasn't prepared to risk that either.
He and Severus had been talking as they worked together to help the former inmates recover while Harry was busy with school and Tom was busy making plans. Sirius had to admit that the forced proximity had definitely helped him to bury the hatchet with his old school mate and the time they spent together working on healing, as well as helping to figure out a teaching schedule, had encouraged a tentative friendship to form between them. It had obviously been helped by Sirius learning how much Dumbledore had lied to him over the years, especially about how he was trying to help the wizarding world whilst simultaneously doing absolutely nothing, and the fact that he knew that Severus would one day become one of Harry's mates so if he wanted to keep his son in his life then he realised he would have to make an effort with his partners.
They hadn't talked about much at first, other than what was happening around them, but eventually they explored other topics, one of which was how the war descended to the madness it had been at the end when Tom's current plans seemed so reasonable. Severus had explained that he and Tom had never been able to consummate their mate bond properly which had caused issues in the relationship that had only been exacerbated by outside forces. Severus explained that he had seen the issues early on but hadn't wanted to do anything about it, thinking that they would sort themselves out on their own. They hadn't gotten better though, they had simply festered, so that by the time Severus had pulled his head out of his arse to try to do something it was too late and he almost lost his mate for good.
Sirius was determined that he wouldn't make the same mistakes. He had a thoroughly satisfying relationship and he wasn't about to take it for granted and risk losing it. This was part of why he was fighting so hard to get things sorted now, when he had first realised the problem, to hopefully nip the issue in the bud.
The sun had yet to set by the time he arrived at the colony and Sirius made a beeline for his partners wanting to make sure he was covered in their scent so the werewolves had a better chance of knowing that he was pack, that he wasn't a threat. This was even more important due to the younger cubs as well as the pregnant wolves who were all sequestered on the other side of the colony with their own partners and guardians with the hope being that if the rest of the pack accepted Sirius then it was more likely that that group would as well. It was, as ever, still a risk and Sirius did what he could to tramp down in his fear as he knew that the werewolves would easily be able to sense it.
Eventually the moon came up and the deafening howls that ripped through the forest rocked Sirius to his core, emphasising the sheer number of wolves that were around him. His only relief was the lack of pain that Remus seemed to go through. As Greyback had pointed out, it only hurt when one resisted which was part of why the alpha could transform on a whim without any problem. By finally accepting that side of him, Remus was able to transform with minimal difficulties, although Sirius noticed that the alpha was still on him like a shot as soon as the transformation was complete.
Moony was a little shaky on his paws so the alpha went over to help and likely to make sure that his mate was unharmed. Sirius followed, also worried about the other man but only earned himself a warning growl when he tried to nuzzle Moony as well.
Know your place it seemed to say and Sirius gulped, stepping back, not wanting the alpha to think he was trying to muscle in.
It doesn't take Moony long to find his feet however and soon the younger werewolf is nuzzling the alpha back. This was a little strange to Sirius who was used to seeing his friend bounding off into the forest as soon as he transformed. Tonight, however, Moony seemed content to sit at Greyback's side and watch the other werewolves galloping around. Sirius wasn't sure what to make of this new, sedate Moony and kept going up to him, nudging him with his nose to try and get him to play. Greyback ignored it at first but soon the warning growls started.
Sirius knew well enough to stop and step back but he looked at the alpha quizzically. While he knew that, for all intents and purposes this was still the Greyback that he had come to care for, there was something a little off about the werewolf version of the man and Sirius couldn't quite put his finger on it. He looked at the alpha, cocking his head to the side as he contemplated the alpha. This action, however, didn't go over well with the older werewolf who must have seen it as a challenge to his authority as quickly began to growl loudly and gnash his teeth at the animagus.
Moony recognised the threat to his friend and began to try to de-escalate the situation, butting the underside of Greyback's chin, nuzzling his cheek and then whining lowly as he pressed his head into the ground in a sign of submission. Greyback was distracted a bit but seemed to need some more reassurance of some kind, pushing at Moony and snorting. Sirius didn't understand what Greyback wanted but Moony seemed to, turning around and presenting his hindquarters to the alpha. The alpha seemed pleased by this action and began nuzzling around Moony's arse, causing the younger werewolf to mewl with what Sirius could only describe as pleasure.
Sirius was fascinated with the display and couldn't take his eyes off the scene in front of him as Greyback suddenly mounted Moony, giving Sirius a flash of a large, rigid cock before it disappeared inside their mate. Moony cried out and Sirius wasn't overly surprised given the size of Greyback and the lack of preparation and Sirius went to move closer to check on him. Greyback growled loudly and gave Sirius a warning bite causing the black dog to whimper and shuffle back lest he risk making matters worse for Remus. Not that Remus seemed to mind what was happening, panting and pushing back against the alpha and howling in pleasure as the alpha sped his movements up, pounding into the smaller werewolf.
Sirius was transfixed. He'd heard about pornography before, and had wanked to his fair share of images of semi-clad individuals, but he had never imagined thay he would be so turned on watching two wolves go at it. It probably helped that he knew their human alter-egos but he still felt a little awkward at how hard he was getting watching the show and had to physically stop himself from dry humping the ground to get some relief.
Eventually Greyback let out a loud howl and gave one final thrust, remaining plastered over Moony's back as he nuzzled and licked around the other wolf's head. Moony himself seemed to be practically purring with contentment and Sirius was curious about what was happening but didn't dare come any nearer while the alpha was still on top of their mate. It took a little while but eventually Greyback moved, huffing a snort in Sirius's direction as if to say "see", like Sirius wasn't already aware of the alpha's position in their relationship.
Greyback moved a little way off and Sirius took that as a sign that he was allowed to go and check on Moony. He nuzzled the other wolf's face and Moony gave him a happy lick in return which eased a lot of the tension in Sirius's body, although the other werewolf still didn't seem to want to move much. Sirius worried that Greyback had inadvertently hurt Remus and, knowing Remus's aversion to pain, moved around to see what damage Greyback had done when penetrating the smaller wolf. Nudging Moony's hindquarters to get him to raise them, Sirius was surprised to see only a very faint tear that he might have missed if he was looking carefully. What did catch his eye, however, was a thick glob of cum leaking out of Moony's whole. It instantly brought back to mind the actions that had caused that to get there and Sirius felt an overwhelming spike of desire course through him, leaning forward without thinking and plunging his tongue into Moony's hole to try to lick up as much of that thick, bittersweet fluid as he could.
Greyback was on him like a shot, barrelling into Sirius and knocking him clean away from Moony as they both rolled across the ground. Greyback was in full territorial mode, hackles fully up and baring his teeth at Sirius as he let out a menacing growl. Sirius knew that he was a hair's breadth away from causing a major incident that might get himself, and even Remus, killed. Remembering what Remus had done to appease the alpha before, Sirius hunkered down as low as he could on the ground and mewled as pathetically as he could to try to show the alpha that he wasn't a threat. Greyback seemed to calm down a bit but it was as if Sirius had committed one infraction too many and a simple show of contrition wouldn't be enough anymore.
Greyback butted Sirius's side. Sirius was a little confused at first but, after a few more knocks and a warning growl from Greyback he remembered and shuffled around, feeling a mixture of trepidation and anticipation as he lifted his rear to present himself to the alpha. He got a bit of a shock at the first touch of the werewolf's cold nose to the sensitive skin if his anus and he pulled away slightly but another warning growl had Sirius holding very still while Greyback took his time, first probing the area with his nose, encouraging the tight muscle to relax, then pushing in with his rough tongue to stretch and lubricate Sirius's hole.
Sirius was in heaven. He knew many people would probably think him weird for enjoying this as he was but he didn't care; the rough tongue of the alpha werewolf felt wonderful inside his tight passage and he soon found himself pushing back, desperate for more. After a while the tongue disappeared and Sirius whined at the loss only to bark in shock and retreat a bit at the first press of the large, blunt head of Greyback's cock. Greyback gave his own bark of warning and Sirius settled himself back down, aware that he would need to get through this if he ever wanted to run with the werewolves again. He tried to relax himself as much as possible but it was still a tight fit, especially with so little preparation and lubrication and he found himself whimpering as his protesting muscles burned as they were forced to stretch so suddenly.
Greyback, to his defense, moved far slower than he had with Remus, giving Sirius plenty of time to adjust to help minimise damage. The downside was that it meant that the whole thing was immensely drawn out and a part of Sirius, the impatient part of him, wished that Greyback would just push in already, tearing be damned. Greyback kept the almost torturously slow pace however, regardless of how much Sirius pushed back, even going as far as to give Sirius a gentle swat on the back of his shoulders when he thought the dog was pushing it too far. Eventually Greyback bottomed out and Sirius let out a sound that was a cross between a growl and a groan, loving the feeling of being stretched like that and grateful for the moment Greyback gave him to appreciate it and adjust. It was just a moment though and Sirius briefly wondered if the alpha's limits were being as tested as his own. Not wanting to risk offending the older werewolf and, Merlin forbid, have his pull out completely, Sirius tried to make himself relax and let Greyback set the pace. It was slow at first and Sirius almost groaned in frustration and contemplated doing something to try to spur the werewolf on when, gradually, the speed started to increase to the point where Sirius was forced to brace himself as he was being pushed across the ground by the speed and force of the alpha pounding into his backside.
Sirius howled, part in pleasure, part in pain, as he found himself unable to do anything about his own cock which was currently lying heavy between his legs and quite possibly harder than it had ever been before in his life. He felt his frustration build but at the same time he didn't want the wonderful feeling of fullness to stop, however much he knew that that was inevitable. He even tried relaxing himself in a vain effort to delay it but it was no use and eventually he felt Greyback stutter slightly before slamming hard into his arsehole. Sirius probably would have been whining in disappointment if not for the sudden pressure in his passage that had him gasping as, somehow, Greyback's cock seemed to swell even more as he felt hot cum being pumped into him. He couldn't believe it. He was being knotted. That knowledge, and the pleasure of being filled so much, pushed Sirius over the edge and he came hard with a loud howl before passing out from the effort.