Disclaimer;;
I do not own Sirius Black, Remus Lupin, or any other character that might show up in the resulting story. They all belong to the lovely J.K. Rowling.
Author's Note;;
Look! I got some inspiration to write a chapter!
I skipped to the full moon night, btw. It's the same day as chapter 15, but night.
Sirius closed his eyes, reveling in the chill that seeped through his sweater and trousers, breathing in the fresh scent of snow. It was freezing and Sirius hadn't brought either cloak or robes. Snow crunched under foot as he followed Remus to the Whomping Willow, his hand clutched in the werewolf's. He stumbled on something and opened his eyes and saw that Peter had already transformed and frozen the massive tree. He caught a glimpse of James slipping inside. Remus and Sirius hurried to slide into the tunnel before Wormtail followed, the Willow stirring to life a moment later.
The Shrieking Shack hadn't changed; perhaps a few more scratches and scuffs than before but that was to be expected. Sirius glanced over the place, noting that Remus was scurrying upstairs already. His mouth twisted into a frown at this but he said nothing. Wormtail scurried onto a half broken table, squeaking wildly as it rocked unsteadily. James and Sirius laughed at the rat. A soft snarl echoed down the stairs and Sirius glanced up them.
"I didn't think he'd change so soon," he muttered, tugging off his jumper so that he wouldn't tear them when he shape shifted. James shrugged, dumping his shoes on the floor.
"Moony has been real antsy the last moon or so. I think it's because he hasn't had Padfoot around but I don't know," James said. Sirius frowned slightly but said nothing else, shoving his clothes into a corner and letting the carnal magic ripple over his skin. There was nothing like transforming into his canine alter ego (except for sex maybe). The feelings consumed him, cracking bone, shifting muscle and lengthening ligament. Padfoot growled as his hips popped. Nearly two months without shifting had made the change a little tough. Prongs had already changed, antlers nearly brushing the ceiling. The snarls from upstairs intensified and Moony suddenly tackled Padfoot, teeth dangerously close to the dog's throat.
Padfoot rolled with the tackle, adrenaline pumping through his thrilled body at the sudden attack. Moony snarled deep in his throat, the noise making Padfoot's ears fall back and Prongs take a step forward. The werewolf forced the dog against the floor on his back and stood over him. Padfoot was breathing heavily, eyes watching his mate carefully. Moony's ears flicked backwards and Padfoot exposed his throat, curling his tail inwards at the same time. Submission was what the lycanthrope wanted, and slowly Padfoot's canine brain recognized this and willingly gave. Moony quit snarling, the leggy creature watching Padfoot's display. Prongs paused, carefully watching the situation with a massive brown eye.
Moony pressed his muzzle against Padfoot's own muzzle and pricked his ears forward, seeming to recognize his mate and accept the submission. Pleased, he allowed the dog to stand but forced the canine to remain a little bit behind him. Padfoot's ears pricked slightly as he rolled to his paws, relieved that Moony had remembered who he was. Werewolves were a risky business and being a mate of one an even riskier one.
As the group escaped from the Shrieking Shack to tear across the plot of land it sat on, Moony was far more docile than he had ever been. He constantly looked at Padfoot, seeming to make sure the massive dog hadn't slipped off and left him. All three Animagi noticed the change, the human part of their brain making small notes of it as they ran and kept an eye on the lycanthrope. It was a strange thing, Padfoot managed to conclude, that Moony wasn't self-harming tonight, nor overly vicious. Only when he, Padfoot, set a toe out of Moony's imaginary lines for his mate, did the werewolf snarl or snap at the Marauder closest to him. Prongs knew the reason for the change, Wormtail suspected the reason and hoped it stayed like this, and Padfoot wished he was the reason but wasn't a hundred percent sure.
Moony knew exactly why of course.
Remus was sitting on the bed, shivering slightly from the chill air of the Shack. Sirius had hurriedly dressed and sent James and Peter off. He wanted to talk to Remus alone. He paused at the doorway to Remus' favorite bedroom, watching the teenager for a moment before joining him.
"Feel okay?" he murmured, nuzzling the other's neck. Remus made a small noise and leaned heavily onto Sirius' shoulder.
"Just tired and thinking," he sighed softly, "Moony was so calm tonight, wasn't he?" Sirius made a noise in return, nodding and breathing in the still earthy scent that clung to Remus' skin.
"You know it's all your fault, right?" Remus said, weaving his fingers through Sirius', "Your hands are hot." Sirius squeezed Remus' hand, smiling.
"What do you mean my fault? It's my fault Moony was so good?"
"I think so. You're all he's wanted…well, Padfoot really but you know what I mean," the werewolf kissed Sirius' hand, "I've never heard of a werewolf being able to behave so well though. I wonder if Professor Dumbledore could help me with some research on it. Do you think wolves are the same? More docile when they're with their mates than without?"
"I haven't a clue," Sirius muttered, kissing Remus simple to make him shut up. The boy practically melted under his lips and straying hand, too tired to fight back for dominance and Moony didn't seem to mind. Sirius straddled his lap, forcing Remus backwards, lips still moving hotly as they changed positions. Remus squirmed at Sirius' hand under his shirt, their intertwined hands positioned above his hand.
"Problem?" Sirius mumbled into Remus' mouth, feeling the werewolf squirm under his hot fingers.
"Like I said earlier, you're hands are hot," Remus said, suddenly jerking as fingernails ghosted over his left nipple, causing it to harden, "Sirius…" Sirius paused, not sure if that had been a 'I-want-more Sirius' or a 'stop-I-don't-have-the-energy Sirius'. Remus sighed, closing his eyes for a moment and wrapping an arm around Sirius' waist to pull him close.
"Cold?" Sirius asked, content to be his boyfriend's human blanket, dropping his face so that he could nip at Remus' throat.
"Mmhm," Remus shifted slightly, squeezing Sirius' hand every time he hit a spot on his neck with his teeth and lips. Sirius wished they had more energy and perhaps a slightly comfier bed. He wouldn't mind having a nice little 'harder-faster-oh-merlin-more-more-more' sort of session right about now.
"We better get back. I'm tired," Remus said. Sirius frowned, still licking Remus' neck. The werewolf's breath hitched suddenly at one of his nips and the Animagi grinned wickedly and began to bite at that precise spot.
"Oh, shit," Remus gasped, fingers digging into Sirius' waist as teeth dug further into his flesh. He squirmed, hips thrusting into Sirius, pressing his neck into the hot mouth yet wanting to pull away. Sirius could practically smell the lust that rolled through Remus' body as he soothed the wound with broad tongue strokes before suddenly biting hard again. Remus gasped again, eyes opening to stare at the ceiling, hand squeezing Sirius' hand harder than ever.
"Shit, shit, shit," he muttered over and over as Sirius continued his torture for a minute more before pulling away.
"I think I bruised you," he purred, shaking his dark hair out of his face. Remus was practically panting, jumping as Sirius' hand slipped from under his shirt to stroke the bright red bite mark.
"Shall we go?" Sirius asked, pulling his hand from Remus' and sliding off of him. He stifled a moan as he slid over Remus' obvious arousal and more or less sauntered from the room. He smiled to himself, trotting down the steps of the Shack and paused to wait for Remus in the entrance to the Whomping Willow. Sirius wondered if he would be able to find the exact same spot if he came up to Remus from behind in a hallway. Of course, he'd be stuck with a practically orgasming werewolf in the middle of half of Hogwarts but it would be so worth it.