***

The walk down to McGonagall's office was surprisingly uneventful, though neither boy noticed because they couldn't stop glancing at each other with bright smiles. Sirius' thumb stroked over the sensitive skin on the inside of Remus' wrist, causing a delicious shudder to spread through the slender boy's body when Sirius pushed him into the wall outside the Transfiguration classroom to kiss him.

"Mr. Black," McGonagall's voice echoed in the corridor and Sirius felt himself being pushed away from the smaller boy. "You're five minutes late."

"S-sorry, Professor," he stuttered upon entering the classroom. "We lost track of time."

The older woman's severe features softened when she noticed their joined hands and she waved them to the side of the room. "Your supper is there," she informed them, "and then you will spend the rest of your time working on your assignment from today."

"But professor," Remus asked questioningly before Sirius elbowed him sharply in the side and he shut his mouth with a snap.

An ambiguous smile fell upon her features, but she ignored Remus' mild protest to their punishment. "I will be leaving now," she informed them. "I will lock the door behind me so you only have access to this classroom and the loo until eight o'clock, at which time the door will open and you will be free to go. Do you understand?"

"Yes, ma'am," both boys replied.

"Very good," she said and disappeared out the door, presumably heading down to the Great Hall.

***

The boys made quick work of their dinner before they settled down to work on their assignments. The assignment started off well, but within the first quarter-hour Sirius was distracted by the way Remus tapped his quill against his lips.

Moony had quite wonderful lips, Sirius thought. Thin, but full, like Remus himself. He wondered what those lips would look like wrapped around his cock, sliding hotly over the sensitive flesh, and he moaned softly at the image in his mind.

Remus looked up at the sound and caught Sirius staring at him hungrily. "Pads?" he asked curiously. "You alright?"

"Nnnn—" Sirius mumbled and grabbed Remus' tie to draw him forward and into a hot kiss. The kiss was not desperate and hurried as it had been earlier in their dormitory, but rather it was soft and sensual, drawing muffled moans from each of them.

Sirius pulled on the smaller boy until Remus was practically in his lap on the classroom stool, but their position was precarious at best, and Remus kept slipping off. With a low growl that went straight to Sirius' throbbing erection, Remus stood and dragged Sirius off the stool, forcing the dark-haired boy into the desk so they were pressed together from lips to knee.

"Moooooony," Sirius cried out when Remus' lips moved from his mouth to his neck, sucking on the delicate skin hard enough to leave a small line of red marks. He shamelessly thrust back into the hips that leaned heavily into his, unable to comprehend why Remus' hands were pushing up on the backs of his thighs until the werewolf let out another low growl and practically lifted Sirius onto the desk.

"Ohhh…" he whimpered when the burning mouth dipped below his collar at the same time frantic hands were tugging his shirt free from his trousers. His shirt was shoved up under his arms as high as it would go, leaving his entire torso to the mercy of his best mate. "Remus," his voice was strained. "Need—"

"Shhh," Remus hummed against Sirius' nipple where his mouth was working it into a hard, tight bud.

Sirius stifled a cry and tangled his fingers into soft, sandy hair in an effort to increase the pressure on his chest.

Remus smiled against the soft flesh as he kissed his way lower and lower until he nuzzled into the soft hairs below Sirius' navel, and let his tongue dip below the waistband of Sirius' trousers.

Somewhere in the back of Remus' mind he knew that McGonagall hadn't intended them to do this in her classroom while they served a very mild detention, but he was powerless to deny his long-harbored desires that were heightened by the potion and the intoxicating scent of being so close to Sirius Black.

He pushed himself back up to his feet, delighted by the cry of loss that Sirius emitted when his lips left the flushed skin, and he leaned in so his lips brushed seductively against the dark-haired boy's ear. "I want to suck you until you scream," he announced calmly, shivering with anticipation when Sirius' hips bucked up against his uncontrollably. "I want you so far down my throat that I choke on it, and after you come," his voice dropped an octave lower, "I'm going to keep going until you pass out."

Sirius keened long and low, thrusting his hips wildly, and his head fell back to expose the smooth column of flesh to Remus' wicked mouth. "Please," he begged shamelessly, rutting against Remus' stomach while the other boy sucked eagerly on the sensitive spot beneath his ear. "Remus, I need—"

Remus didn't wait for Sirius to finish his sentence before talented fingers made quick work of his belt and zipper, tugging his trousers and pants down just enough for his cock to spring free of the confines.

Sirius hissed when cool air hit the sensitive tip, but the sound quickly became a strangled cry when the head was engulfed by a warm, wet heat. Remus' tongue circled the head of his penis and sucked enthusiastically, sliding lower and lower until his nose was buried in the dense black curls at the base of Sirius' cock.

The dark-haired boy tightened his hold on Remus' hair, trying to control the intense desire he had to shove his cock all the way down Remus' throat. His hips thrust shallowly, forwards and back, and he cried out when Remus hummed around the mouthful of Sirius' prick, sending waves of pleasure shooting through his body.

Remus was on his knees again, his head bobbing back and forth while Sirius' cock slid gracefully through his lips, just as it had in Sirius' dreams. "Remus," he whimpered, trying to warn the other boy, "I'm going to—" his words were cut off when blue eyes met gray and held his gaze even as Remus continued to suck him off.

Before he could finish his sentence, his muscles seized up and he exploded down Remus' throat, a hoarse cry being ripped from his shaking body while he held his friend's head in place until the other boy had swallowed every last drop of his spunk.

Remus' tongue continued to swirl and lap at the overly-sensitive flesh until the shaking had subsided and Sirius pulled him away. The werewolf's eyes were a deep, intense blue that Sirius had never seen before, and he limply tried to draw his friend, now lover, up into a kiss.

Moony's lips were swollen and his face was flushed when he understood Sirius' unspoken wants and stood on shaky legs to pull the dark-haired boy close and kiss him softly.

Sirius could taste himself on Remus' tongue, and he felt himself getting aroused again at the thought of what Remus had just done. "Do you—" Sirius panted slightly, pulling his lips free, "do you want me to—" he hinted awkwardly, hoping Remus would understand.

"There's no need," Remus' whispered breathlessly against his ear. "I already finished."

Remus' ears were bright red with embarrassment, and sure enough, when Sirius looked down he could see the tell-tale wet patch on the front of Remus' trousers. Sirius was both amused and saddened to know Remus had come without even being touched.

The sandy-haired teen, once again attune to Sirius' thoughts, rubbed soothingly at the nape of his neck. "You can make it up to me later," he whispered. "In any way you want."

Sirius shivered at the implication and clutched Remus until their heart rates had slowed and their breathing had calmed. "We should finish our assignments, yeah?" he asked half-heartedly, unsure of how to act around Remus now that…

"Yeah," Remus agreed and performed a cleaning spell before he returned to his seat, leaving Sirius to clean himself and get dressed again.

The dark-haired boy could see the tense set of Remus' shoulders and knew he had done something wrong. Once he was presentable again, he moved behind the other boy instead of returning to his chair, and wrapped his arms around Remus from behind. "That was amazing," he announced softly. One hand wandered down Remus' chest to rub at the smooth planes of muscle and tweak a nipple.

"Good," Remus exhaled and leaned back into the touch. "I was kind of afraid you'd be over all this."

"Merlin, Moony," Sirius replied, dumbfounded at the words. "I finally have you. Why would I ever be willing to give you up?"

***

Detention carried on the same way for the remainder of the week. The pair spent every moment together, constantly touching and pausing to kiss in the halls, completely enraptured by each other. In fact, they were so caught up in themselves and their new relationship that they didn't even notice when the attacks stopped and the other students slowly returned to dating amongst themselves.

No one, not even Headmaster Dumbledore, knew if the affects of the potion wore off first or Remus and Sirius falling in love nullified the potion, but needless to say, learning to brew an Infatuation Potion was promptly removed from the Hogwarts curriculum.