Disclaimer: The characters belong to JKR, but the story's mine.
Sirius grimaced as they pulled apart. "This is one hell of a hangover," he grunted.
"Are you sorry?"
"No way! I just wish I'd gone to sleep in a more comfortable position." He cricked his neck, rubbing it sullenly.
"Actually, what you did—it's not called 'going to sleep.' It's called 'passing out.' And you can't really choose where or when you do it."
"You passed out, too," Sirius said huffily as he stood up, stretching.
"I didn't pass out! I went to sleep long after you did, thank you very much." Remus chuckled at the rumpled state of Sirius's hair.
"What are you laughing at?" Sirius offered him a hand and pulled him up.
"Your hair looks like Buckbeak nested in it."
Sirius made a mock-offended face.
"That'll be our project for the day, eh, Padfoot? Taming that hay bale you call a mane."
"Fine, but first we're waiting for this hangover to go away. My head hurts like hell as it is. I don't need you making it worse by pulling my hair out."
"Keep that up and I might decide to save time by shaving your entire head bald while you're sleeping."
"Remus John Lupin, you wouldn't dare!"
Remus shrugged nonchalantly. "Doesn't make a difference to me whether you've got hair or not."
Sirius leaned over and whispered a comment in his ear that made him sputter and turn a magnificent crimson that would have made any Weasley proud.
"Padfoot, hold still!" Remus whapped his struggling lover with the comb he was holding. He was perched on the edge of the bathtub as a shirtless Sirius kneeled with his back to him. Curls of sable hair lay scattered on the floor of the tub.
"Are you sure it's straight, Remus?"
"Even if it isn't, it has to be an improvement over the mop you had before, right?"
"I think you mean, 'Even if it isn't, your magnificent hair will look dashing no matter what.'" That earned him another whack with the comb.
Remus worked in silence for a few minutes, lovingly trimming the unruly mat of hair into a neat row.
"There," he remarked, surveying his handiwork. "Perfect."
Sirius turned and inspected himself critically in the mirror. Remus found it hard to breathe at the sight of Sirius's naked torso. Three days of full meals had done him a world of good, and a ghost of his old luster was starting to creep back into his skin.
Remus flushed when Sirius caught him staring. The smirk that lit Sirius's face just made Remus blush harder.
He coughed, looking away. "I—I'll go make dinner. It should be done by the time you finish your shower."
Remus turned to go, but froze when Sirius grabbed him by the wrist. Strong arms inched around his waist.
"Dinner can wait," Sirius murmured, his hot breath tickling Remus's ear and making shivers run up and down his spine. "I told you I loved you. Don't you want to know how much?"
"Please, Moony?" Sirius licked the lobe of his ear sensually. "I've waited so long. Besides, you could do with a shower, too."
Sirius slowly drew him into the shower, unbuttoning his shirt and casting it off along the way. Pajamas were pushed down; boxers were left to pool on the floor.
Remus had barely turned on the water when he was abruptly pushed up against the tiled wall by Sirius's lips. He moaned and yanked Sirius closer by his hair. Sirius's hands felt like irons on his back. He could not remember the last time he had been so caught up in the ecstasy of desire.
"I love you, Rem," Sirius breathed over his lips.
"I love you, too, Padfoot."
Then there was no more need for words as Sirius proceeded to show Remus just how much he loved his Moony.
The two weeks passed by in a haze of elation. On the last night of Sirius's stay, he lay curled up with Remus in the bedroom.
"I'll miss you," Sirius whispered to his lover, pulling him close.
"Do you know where you're going yet?"
"South," Sirius said simply.
Remus bit his lip worriedly, his eyes swimming with questions he was trying not to ask.
Sirius tightened the arm that lay across his lover's abdomen, nuzzling Remus's cheek with his nose.
"I'll be fine, Remus. Don't worry yourself."
"I wish I could go with you, Siri."
"I know. But if you disappear, the Ministry will jump to the conclusion that you had something to do with my escape."
"I bet they've already considered it. If it wasn't for Dumbledore, they would have…"
"Shhh." Sirius pressed a kiss to Remus's lips. "Let's just enjoy this night."
Remus nodded, turning so that he was lying on his side, facing Sirius. A sudden, feral grin sparked on his face as he pressed their bodies flush against each other.
"Think your old bones are up for another round?" he whispered wickedly.
"Old, am I?" asked Sirius, kissing a path down the pale neck that was offered to him. "My dear Mr. Lupin, thirty-five is hardly old."
"Oh, really? I'm not sure that I believe you."
"Then let me show you." With that, Sirius pulled his lover in for a searing kiss that set his nerves ablaze with passion.
A week later, a letter arrived for Remus as he sank down into his favorite armchair to enjoy a cup of tea. The carrier was a large, tropical bird that, Remus thought, must have attracted quite a bit of attention flying over Britain.
He let the bird in and unraveled the letter with anticipation.
I hope this letter finds you. This is the first time I'm using one of these birds and I don't know how reliable they are.
I'm successfully in hiding. The place is really agreeing with me. You wouldn't be able to keep your hands off me if you saw me now.
Remus could practically see Sirius waggling his eyebrows and smirking. He chuckled to himself.
Wish you were here. Just know that I miss you like hell. You're always in my thoughts, love. I've been pretty bored just sitting around in hiding, so I've written something for you. It's sealed by the same password as the map.
Write back soon. I'll be waiting. Loving you and missing you lots (and not just the sex, either).
Remus couldn't keep the smile off his face. He read the letter over, feeling a fluttering in his heart at the words. Then, curiosity ignited at what Sirius could have possibly written, he pointed his wand at the letter and mumbled, "I solemnly swear that I am up to no good."
Immediately the words vanished, only to the replaced by a very long list scrawled in Sirius's handwriting.
Remus blushed as he read—it was a list of all the things Sirius wanted to do to Remus when they met again. If his heart was stirred by the letter, the list stimulated an entirely different part of his body.
That night, he put the letter in the drawer of his nightstand and lay down to enter the dream world where he could visit his beloved.
For the first time in thirteen years, Remus felt like he was wanted, needed, loved. It was a feeling he never wanted to lose.
He sighed contentedly.
Be safe, Sirius. I love you.
Okay. I have to make a HUGE apology to all you guys. I'm sooooooo sorry about waiting so long. I've just had other plot bunnies (rabid ones, I tell you) to entertain. But I hoped you liked the end. And yes, it is the end. I'm so glad you guys want more. And I know a lot of people requested me to go up to OotP. But the problem is, if I go that far, I know that I'll include Sirius's death, and I'm not sure I want to. It just seems so much better that I stop here and let them live happily ever after (sort of), instead of torturing them with Sirius's pathetic state (living off rats) in GoF and then his semi-depression in OotP. But don't worry. I'll be making a sequel (or a few one-shot sequels). I don't know how soon, but I'm pretty sure it'll happen. Sorry again for the long wait. And my eternal thanks for sticking with me this long.
See you all (hopefully) in the sequel(s).