So… Since quite a few of you expressed a… desire *cough* for more Duncan/Riordan, here's a super gratuitous smutty bonus chapter that does nothing whatsoever in terms of advancing the plot of this story.
You've been warned. ;)

Duncan was woken by the first rays of sunlight. Silently cursing the hotel's inability to provide proper shutters, he rolled on his back, trying to take stock of the situation.

Isabela was gone; she must have left some time ago. No surprise, since she probably had to go to work today, but he still felt a vague tinge of disappointment. It would have been nice to wake up with her warm body next to his, her scent in his nostrils, the sound of her giggle as he tickled her awake.

On the bed next to him, Riordan was still fast asleep, stretched out on his back in a posture of sheer abandonment. Seeing him like this, chest bare, his legs tangled in the sheets, his face open and relaxed, it was all too easy to imagine that no time at all had passed since their days at medical school. No time at all since that night… Duncan sighed wistfully as the memory came back with full force.

Riordan placed the receiver in the cradle with a disappointed sigh. "They can't make it tonight. Lilly ate something that didn't agree with her, and she feels like hell warmed over, she said. Kay will keep her company, but our plans are cancelled, I'm afraid.

"Ah, damn it. Still, there's nothing to be done, I guess." Duncan was just as unhappy with the news.

They had both been awaiting the evening impatiently, imagining all the things they could do together. But, instead of getting naked with the girls, they got ready for the night, squeezing into their tiny bathroom, one after the other, to brush their teeth and put on pyjama pants. Neither of them was in the mood for finding something else to do, so an early night seemed a reasonable course of action.

They had already settled into their narrow beds and turned out the lights when Duncan was struck by a sudden thought. "Say, Riordan… Do you think Lilly's really sick?"

"Why wouldn't she be?" Riordan sounded genuinely surprised.

"Well, maybe they wanted some time without us." Duncan chuckled. "Maybe the two of them are getting hot and heavy with each other right now."

Riordan groaned. "Damn it, Duncan! As if I wasn't horny enough already! Now I'm imagining them and…" He breathed in sharply.

Duncan couldn't blame him. He felt much the same. All the afternoon's anticipation had left him just as worked up, and the mere thought of the girls kissing, touching, their beautiful bodies entwined, made it worse. He was fully hard before he knew it. He did his best to think of something else, to will his arousal to abate, but it was hopeless. Whenever he closed his eyes, the images returned, tormenting him, making him buzz all over with desire.

Next to him in the dark, Riordan shifted restlessly. "Shit, Duncan, I can't sleep like this. Do you mind if I…?"

To his surprise, Duncan's heartbeat sped up considerably at the thought. "No, of course not. Although…" He had to swallow before he could continue. His throat felt dry as dust. "Can I… Can I watch?"

Another sharp inhale from Riordan. "You… Why… I mean, yes. If you want."

With shaking hands, Duncan reached for the light switch. Riordan had already pulled his pants down. His hand was on his hard cock, stroking rhythmically, and it was… Duncan swallowed again. "Can I come closer?"

"Sure." Riordan was watching him, too, his eyes gleaming with excitement, and his breath coming in quick, hard bursts.

Trembling, Duncan settled on his bed between his legs, eyes firmly fixed on the movement of his right hand. Riordan had started off rough and fast, but now, with Duncan's eyes upon him, he slowed down, savouring each stroke of his hand, each swipe of his thumb over the weeping tip of his cock. It was incredibly hot, and Duncan couldn't take his eyes off him, not for a single moment.

"Duncan." Riordan's voice sounded strained. "Please. Let me see you, too."

With a shaky nod, he pulled down his pants, exposing himself to Riordan's hungry gaze. He kept his hands well away from his cock, though. If he gave in to the temptation to touch himself now, there was no way he would last long enough to watch. And he wanted to watch, he needed to see Riordan come, he craved his friend's release almost as intently as Riordan himself.

Riordan's hand was moving faster and faster, squeezing, twisting, his whole body going taut as he neared his orgasm. When it finally hit him, it was gloriously beautiful, a long, heaving shudder as he spilled all over both their stomachs, moaning with abandon.

Duncan was so close himself he ached with it. Fortunately, Riordan didn't waste any time. Quickly and decisively, he wrapped his hand, still slick with his own come, around Duncan and stroked once, twice, then once more. It was more than enough. Duncan came so hard he had to brace himself against the bed's headboard with both hands, so hard that he actually cried out loud, so hard he lost track of space and time for a moment.

And afterwards-

"Duncan?" Riordan's sleepy voice tore him out of his dream. "How come you're already awake?"

"Force of habit, I guess." He smiled down at Riordan's scrunched-up face. "Isabela has already left, I'm afraid."

"Pity." Riordan stretched with a pleased sigh. "What a night, eh? Good to know we still can have fun together."

His eyes wandered down to Duncan's groin, and widened slightly. Duncan's daydreaming hadn't left him unaffected, and he was almost fully hard again.

Riordan whistled softly through his teeth. "Again? I have to say, I'm impressed, old man."

"I'm not that old," Duncan growled back. True, he was a year or two older than Riordan, but that would hardly make a difference, would it?

"It seems not." Riordan grinned widely. "Join me in the shower?"

"Sure." Duncan felt a pleasant shiver down his spine. Maybe this wasn't over yet, despite Isabela's abrupt departure.

When he got into the shower, there was a moment of uncertainty until Riordan stepped into the spray behind him, warm and firm, and embraced him with a laugh. "Need help?"

Actually, he was perfectly capable of soaping up himself, yet there was no denying he preferred Riordan's hands on him, slowly massaging his chest, his stomach, then sliding lower until his right hand closed around him, slick with soap. With a low moan, Duncan let his head sink back against Riordan's shoulder.

"Damn it, Riordan." He thrust involuntarily into the other man's hand, whining when Riordan responded with a quick twist of his wrist. "How do you- What have you been up to in the last twenty years?"

Riordan's voice was rough and hoarse against his ear. "Well, I don't know about you, but that night we spent together, back then…" His grip tightened, and his other hand sneaked between Duncan's legs from behind to play with his balls. "It was quite the eye-opener for me. Ever since then I've known that I like men."

"And women," Duncan threw in, though he found it increasingly hard to be articulate.

"And women," Riordan confirmed, his hand teasing further back. "And I've had my fair share of both."

Duncan didn't even have time to tense up before a soap-slicked finger slid inside him, probing and exploring, adding a whole new layer of sensation. He cursed violently, bucking into Riordan's hand. Riordan laughed giddily, adding a second finger, applying even more pressure, and it was- Duncan gave up on finding words for it, just let his body take over, let Riordan guide his movements. Which was the right decision, obviously, since Riordan knew exactly what he wanted, knew when he needed it faster, harder, more, until he simply couldn't take it anymore and came with a last, almost desperate jerk of his hips.

Riordan slid both hands up to his chest to hold him tightly, murmuring soothing words in his ear as the warm water washed away the mess on his stomach. Duncan felt too dazed to say anything before they'd made their way out of the shower and dried off, but as soon as he could speak again, he gestured at Riordan's cock, heavy and hard against his thigh.

"What about you?"

Riordan smiled and lay back on the bed without any trace of embarrassment. "Come here."

There was a certain sharpness in his tone, making it clear this was a command, not a request, and Duncan responded immediately to it. It had always turned him on when Riordan ordered him around, even back when they'd been with the girls. Now, it seemed doubly appropriate, since Riordan was clearly far more at home with this scenario than he was.

"What do you want me to do?" He joined Riordan on the bed, tracing the muscles in his stomach, unable to resist touching him.

"What I want…" Riordan's eyes grew impossibly dark. "What I really want, Duncan, is for you to lie back and let me fuck you, deep and slow." He didn't miss the glimpse of anxiety on Duncan's features, though. "Hey, don't worry. I know what I'm doing, and I'd make it good for you, so good you would beg me never to stop."

Duncan shivered involuntarily at the absolute certainty in Riordan's tone.

"However…" Riordan shrugged and made a face. "In the absence of proper lubrication and in view of the fact that we ran out of condoms sometime last night, I guess I'll have to settle for your hands. Or your mouth," he added with a sly look at Duncan.

Duncan hesitated only for a heartbeat. Once again, a vivid memory flashed before his inner eye: Riordan, stroking himself furiously, so close to coming. Back then, he'd been sorely tempted to touch him, to taste him, but he hadn't dared. He had no such scruples now, even if he was only marginally more experienced.

"How about both?" he suggested, as casually as he could, and was rewarded with a rough gasp from Riordan.

"I take it that's a yes?" Arranging himself with his head on Riordan's thigh, he took him carefully between his lips, just the tip of his cock, while his hand closed around the shaft.

Riordan moaned happily, and he took it as encouragement, continuing what he was doing, sucking harder and adding more pressure when Riordan arched hungrily into his mouth. He mostly went by instinct, and by what he would have enjoyed himself, and it seemed to work fine. Riordan was getting incoherent already, begging for more, his hand clenching tight in Duncan's hair. He held on for as long as he could, though, and when he finally came, Duncan felt it just in time to pull back and avoid swallowing. He wasn't going there, at least not yet. Besides, it was actually hot to see Riordan come, to watch him spurt all over his chest and stomach. He felt a fierce rush of pride at seeing his friend so wrecked and sated.

Riordan's eyes were half-closed, and he was panting heavily. "Damn, that was amazing. Thank you."

Duncan was about to answer when his phone buzzed on the nightstand. He reached for it with a frown that turned into a smile when he read the brief message. "It's from Isabela. She says thank you for last night. And she says we can get back to her any time for a new date, all three of us, with more time to spare. What do you think?"

Riordan laughed breathlessly. "God, yes. Whenever you can make it." His eyes flashed with passion as he glanced up at Duncan. "None of my dreams ever were this good."

Huggles to suilven for her amazingly swift and thorough beta work. :)