Disclaimer: Nothing is mine. Sadly.
Author's Note: This was originally a Christmas fic. It still is, I guess, but I'm finishing it in [belated] honor of Valentine's Day. So yeah. Enjoy!
Edit: Ok, it's WAY past Valentine's day....heh, heh... But better late than never, right?
WARNING! This contains SLASH, SMUT, CLICHES, and NO vestiges of the original PLOT! heh, heh....
Remus, his eyes fluttering closed, reached for Sirius's hard member. He ran his finger over the weeping slit at the tip, then his hand closed around the Animagus' cock and Sirius almost bit Remus's nipple in shock. He groaned, the sound muffled by Remus's chest, and kissed his way up the scarred flesh to his neck. He swept his lips gently over Remus's jaw and continued along to his ear. He ran his tongue around the shell of his ear before biting it, and whispered raggedly, his lips still brushing the werewolf's ear, "You're still wearing far too much."
Remus shivered in pleasure (and a bit in nervousness) when he felt Sirius's mouth at his ear. He was almost incoherent from the unfamiliar feelings coursing through him, so he didn't reply to Sirius. Instead his hand left Sirius's cock and fumbled at the waistband of his boxers. He was stayed by a soft hand covering his. "Let me," said the Animagus gently.
Sirius slid Remus's last remaining clothing down his pale legs, and the sandy-haired boy kicked them off, divesting himself of his boxers. When Sirius saw Remus's hard cock standing at attention, it was all he could do to keep his mouth from watering. Without hesitation he flipped the two of them over, so Remus was lying back against the pillows and Sirius was poised above him. The Animagus leaned down and kissed Remus's left nipple, then copied the action on the right. He proceeded to lavish kisses down to the werewolf's groin. Sirius paused there, and looked up at his best-friend-turned-lover. Remus's eyes were hooded, and he was breathing quickly and shallowly. "Sirius..." he moaned. That was all the encouragement the black-haired boy needed, so he dipped his head down and took Remus's swollen member into his mouth.
The feeling was so different than his own right hand that Remus gasped. The Animagus' mouth was warm, and wet, and--Oh, Merlin!--utterly divine. Bobbing his head up and down, Sirius took more of Remus's member every second, and it was all Remus could do not to thrust into his best friend's mouth. Sirius gradually slowed the pace until finally he let Remus's cock out of his mouth with a wet Pop. Slowly, as if he was licking an ice cream cone, he ran his tongue up the underside of the lycan's engorged member; when he reached the head he gently circled his tongue around it, spreading around the pre-come that was seeping out the tip. Remus groaned. "Ungh--Sirius..." he managed hoarsely. His breathing was ragged and uneven, and his entire body was slicked with sweat. "S-Sirius," he tried again, propping himself up on his elbows, "Sirius, I'm going to--I'm--" With that his breathing cut off and Sirius felt his muscles tighten. Quickly Sirius again closed his mouth over the head of his friend's cock, and within seconds he felt hot spurts of Remus's come hitting the back of his throat. His eyes watered slightly as he fought his gag reflex, and in the end he won.
His muscles spasming, Remus collapsed back onto the pillows, his eyes falling shut. Sirius, still with a sizable problem, continued to lick every drop of delectable come off the werewolf's softening manhood. Satisfied he'd gotten it all, he licked his lips and leaned up to kiss Remus on the lips. Remus was shocked into opening his eyes, and felt himself becoming lost in the taste of Sirius's lips and the taste of his own come. Not forgetting about his friend, however, he reached down (never breaking the kiss) and closed his hand around Sirius's erect cock.
Sirius moaned into Remus's mouth, and Remus took the opportunity to thrust his tongue into his best friend's mouth, never slowing his strokes on Sirius's member. Sirius could barely manage to remain on his knees above his best friend, tangling his fingers in the lycan's sandy hair and holding on for dear life as his hips began jerking forward to meet each movement of Remus's hand. Remus tongue-fucked his mouth in tandem with his strokes, then broke away and began kissing his way down the Animagus' neck. Soon he felt his friend losing control; Sirius's thrusts became harder, and his breaths became uneven and harsh. "Mooney," gasped the Animagus, "Mooney, I--I think I--love you!" And with a ragged cry he fell into blissful oblivion, just as Remus bit down on his shoulder. His eyes tightly shut, Sirius vaguely felt two hands cupping his face. He felt a smooth cheek touch his own, and silky lips at his ear, barely kissing the soft lobe. "I love you, too," whispered Remus, and with that Sirius collapsed on top of his best friend, not minding the sticky come on both their stomachs, sleepily reveling in post-coital bliss.
A/N: It's finally done! It's been almost exactly six months since I started this fic as a Christmas gift for my friend Riley Masters, and I've finally gotten past the Smut Hurdle. xD That said, it's not actually done. There is a final chapter... R&R?