“THREE”, 67/?, ONG, PB/AU, NC-17 for graphic sex

[silver]

“THREE”, 67/?, ONG, PB/AU, NC-17 for graphic sex

Title: THREE
Author: silver
Chapter: 67/?
Fandom: PB/AU
Rating: NC-17 for language and graphic sex
Warnings: Slash
ORIENTATION:   slash
Pairing: Derek & Billy
Summary: bonding
Disclaimer: The character of Richard B. Riddick does not belong to me; I earn no money by his depiction here. Dang it. Everyone else is mine.  Mine! Mine! Mine!  
Feedback: yes please, here or wherever.
Archive:  yes. Please ask.
DEDICATION: The title, "Three", is a take-off on Chriscent's "Two for One" fic; I think her muse often takes my slash muse out for drinks and bondage.


   “C’mon, it’s been, like, forever!”
   Stepping in the door of the rooms he shared, Derek heard Billy’s frustrated yowl.
   “And I’ve been good,” the youngest member of the trio continued.  “I’ve been working all my shifts and my grades are all up there…I’m just…bored!”
   Riddick tipped his head to the side at this, as if considering.
   “Not bored with you,” Bill rushed in, “…just…bored with being in all the time…I don’t go anywhere but school…come on,” he wheedled, “…just one night!”

   Riddick sat on the couch, stretched out seemingly in comfort.  His mouth twisted a bit at Billy’s words; Derek didn’t think it was amusement that caused the expression.
   “A disaster waitin’ to happen,” the big man tolled out.
   “Oh, come on!  It’s no big deal!”  Billy raked his hands through his hair.  “You, too,” he suddenly added.  “You come out, too.  You need a break, right?  You’ve been working like crazy…come out with me; that’ll work, won’t it?”
   Riddick shook his head.  “Somebody’s gotta mind th’ store.”
   “Derek can do that, right, Derek?  He’s usually on the bar…come on, please, please?”  Bill sat beside Riddick and pleaded his case.  “We’ll go wherever you say.  I just want to…you know, get out a little.  I feel like I’ve been cooped up and I’m…I’m losing my damn mind!  Cabin fever!  You know?”  He rubbed the bigger man’s thigh as he stared into his face, trying to gauge the answer.

   Riddick glanced at Derek, back to Billy, then shook his head.  “It’s a real bad time to be goin’ out on th’ town…”
   “I’ll be good.  I’ll be careful!  It’s just…I listen to everybody at school talking about the parties they went to, and the concerts and shit, and I don’t get to do anything.  I just go to school and work…and come home, here, which is great; but…just to get out, you know…” the younger man’s voice sounded so wistful to Derek.  He suddenly remembered Riddick describing what Cybele’s type of enslavement would mean to someone like Billy, and how close the young man’s life had come to that description…maybe protecting him this much is just as suffocating…

   Riddick tilted his head back and looked at Derek for a long moment.  The big man’s eyes narrowed down, and Derek felt a nervous flutter in his chest.  He’d left his studio only an hour ago, and hadn’t really had time to see if his latest run-in with Mason had left any visible marks.
   But Riddick seemed to have something else on his mind.  “I can’t go with you…but Derek could, tomorrow.”
   “I could?”
   Billy leaped up, gave a whoop as he pumped his fists toward the ceiling.  “Yes!  Yes!  Yes!”  He grabbed Derek around the waist and whirled around him in a circle.  “Out with th’ brother-man!  I’m gonna show you some night-life, bro…”
   “Billy.”
   Bill halted immediately. “Yes, my liege, I am yours to command.”
   “Derek runs the show.  You go where he wants, you leave when he wants.  You do what he says.   You hearin’ me?”
“Yes, yes, no problem; he’s the man.  Seriously,” he added, at Riddick’s skeptical expression.

Derek viewed this in some surprise.  “You think this is a good idea?” he asked Riddick bluntly.  
They watched Billy cavort across the apartment, galloping back past them into the kitchen, smacking his thigh like a cowboy.  “Boy’s got a point.  And nothing’s happened…for too long.”  Riddick slanted his dark eyes up to Derek.  “Might need to stir things up a little.”
“You’re shitting me,” Derek breathed, almost a whisper.  “You’d send us out like that…like bait?”
“Not bait,” Riddick growled.  “Well, yeah, sort of like bait,” he conceded, an instant later.  “But you won’t be alone; he just won’t know it.  You’ll need to watch him.”
“Shit, Riddick…” Derek watched Bill gallop past again, singing ‘I Love the Night-Life’ at the top of his lungs.  “What if something happens?”
“I’ll be there.”  Riddick’s delivery of this was pure, black threat.

 “Laundry!  I have to do laundry, shit!  Outta my way!”  Billy bulled past. “See you later, Rick.”  He bent, grabbed the bigger man by the face and gave him a resounding smack on the lips.  “And thanks!” he added, then charged out the door.

“Listen, have you got a minute?” Derek began, tentatively.
“I need to set some things up…for tomorrow.  Not a lot of time.  Can it wait ‘til later?”
“Sure,” Derek said, relieved and uneasy at the same time.  “I’ll catch up with you later.”

But through the interference of one ordinary thing and another, Derek missed the opportunity to discuss Mason’s visit at the studio.  In truth, he deliberately missed the opportunity, because he made no real effort to bring the subject up.
 As the day lengthened into evening, Derek down-played the events in his mind to no more than a brief pass made by the other man.  He knew he was prone to exaggeration; this, no doubt, could be seen as more of the same.  And it was such a relief to put it out of his mind.
I’ll tell him later…if he asks…
~~~~~~~~~~~~~~~~~~~

Billy turned preparing for the night out into its own occasion, as he rummaged through his laundry for certain favorite clothes; he even took the time to get his hair cut.
Derek watched him with bemusement. Like he’s going to the prom.

“What do you think?” Bill asked the following day, raking his hand through his hair as he leaned closer to the bathroom mirror.
Derek thought it was the first time he’d heard anything remotely like self-consciousness from his younger partner.   “It looks good,” he allowed.  He thought he noticed some lighter streaks here and there, but it was fairly subtle…for Billy. “Looks…polished.   Makes you look older.”
“Well, that’s always good.”
Derek shook his head a little. “You don’t need to look older, Billy…why would you want to?”
“Yeah…right…I’ll get there soon enough!  Right?  You’d know all about that!  Right? Right?” He dug into Derek’s ribs with a boney elbow.
Derek feinted a slap toward the back of Billy’s head, well-telegraphed.  Bill ducked it smartly, but left himself wide open to the finger-jab in the gut that doubled him over.  
Derek snorted in satisfaction.  “So slow...what a loser.”
“Great hair, though.”
“Good  hair, I said.”

It was still too early to go out, so the two settled in on a couch to watch movies.  Riddick had been gone for hours, mapping out some well-placed ambush, Derek hoped.
Bill’s lanky frame was folded up to his left, somehow taking up the majority of space, even though his spine was jammed into the angle of the couch’s back and arm, and his knees were bent, as he shortened himself as much as possible.
Derek’s attention was diverted from the movie; he found himself checking the younger man out, noting differences in addition to the new haircut.
Billy wore soft, old jeans and nothing else.  The legs of the denims were worn and ragged in places; they exposed a couple of inches of bare ankle and all of his long feet.  Above the waist, Bill’s shoulders looker broader, the line drawn from shoulders to waist a more exaggerated vee than Derek remembered.
He’s filling out more…getting wider in the chest and back…shit, he can’t be getting taller, can he?

He suddenly thought that Billy might be uncomfortable, doubled up the way he was, so he took the younger man’s ankles and drew his legs out straight, laying Bill’s pale feet in his lap.
“How’s that?  Better?”
“Yeah, that’s good, thanks.”  Billy stretched his body subtly, turned more to his back.  He watched Derek for several seconds, expressionless.
Derek returned the look, studying Billy’s face, and the shape of his body against the leather couch.  “You look different.”
Bill’s mouth tipped up on one side in a twitch.  “You haven’t looked at me in a while.”
“I look at you every day.”
“Yeah, you look…but you don’t see me.”
Derek blinked, a little dismayed.  “I see you,” he said defensively.  “Just haven’t had a lot of time to do anything about it…” he trailed off, heard the weak excuse.
 “We’ve got time now.”  Bill’s eyes held Derek’s, steady and calm.

The three men were intimate nightly, and sometimes daily as well.  They found ways and means to be together, as a threesome, and in pairs.
Reflecting, Derek realized he and Billy hadn’t paired off for sex, alone, for some time now.  Shit, there’s only so many hours in the day…or the night!
He let his gaze wander over the slim body beside him, the changes rendering him almost a stranger.  “Yeah, we do…”  His hands reached under the legs of Billy’s jeans, lightly rubbed his calves, feeling the soft furring under his palms.  “…if you’re interested,” he added, unsure.  Bill’s remark might hide a deeper feeling of insult; unlikely, but still a possibility.  Assumptions were always unwise, in Derek’s opinion.
Billy’s smile widened, and he stretched out, splayed his legs a little, putting his arms up over his head while his eyes gleamed.  “I’ve been waiting for you.”

Derek crawled between Billy’s legs on hands and knees, slowing to place random, gentle bites up the younger man’s thighs.  He nuzzled his face across the soft denim of Billy’s lap, and felt a stirring under his lips.  Not trusting his teeth, Derek dug in a little with his chin, and dragged the worn, baggy fabric down an inch or so.  Then, he carefully took the waistband of the jeans in his teeth and lifted it, away from Billy’s body.
Billy rolled his pelvis, slowly, watching Derek the whole while.  “Oh, that’s good,” he muttered.

Head lowered, Derek looked back up at Billy and grinned around the denim clenched in his jaws.  He released his hold, then snatched at the waistband again, biting the fabric fiercely.  One hand slid up the inside of Billy’s thigh and grazed over his lap, covered in thin worn fabric and nothing else.
“Hang on…” Billy jammed his hand down the front of his pants, roughly adjusted himself, then lay his arm back over his head.  “Much better.”
Derek let his tongue trace along Billy’s waist, following the top of his jeans.  He felt Billy quiver under his touch; the younger man was extremely ticklish.  Biting methodically along the denim waistband as he moved closer to the zipper, Derek yanked at the fabric, lifted it to peek at the skin beneath.

Billy moaned under him, hips rotating an excruciating slow circle.  “Ohhh…so good,” he whispered.  A swollen bulge in his pants raised the edge of his fly away from the zipper of his jeans.
Derek carefully took the flap of fabric between his teeth and listened to Billy’s panting breaths above him.  He rocked back a little on his knees, tugged steadily downward on the loose jeans, lowering the waist an inch or so, which exposed the head of Billy’s penis as it strained upward.  Kneeling up over the younger man’s body once more, Derek bent his head and drifted his mouth across soft belly skin, brushed his lips lightly over the flushed head of Billy’s cock; watched it twitch, swelling.  He breathed out, warm air fanning back into his face, so close to Billy’s skin that he could see the light glisten on the fine hairs on his stomach.  He smelled skin and salt, male musk and semen.  He couldn’t resist; his tongue darted out and tasted Billy’s cock, bathed the tip with a languid flick.

“Fuck.”  It was just a hoarse exhalation, barely heard.  Hearing it made Derek smile.  Carefully, he began to use his teeth to open Billy’s jeans.  The metal fastener was button-shaped, on a short shaft; he tugged at the buttonhole, trying to stretch it, while Billy groaned and cursed to himself.
Inventive use of teeth and tongue pushed the fastener through its buttonhole, and that much more of Billy’s prick protruded from his jeans.  Derek rewarded himself with another taste, slower this time, rubbing the flat of his tongue across Billy’s cock, smearing juices across the hot skin while his partner went rigid beneath him.  Lowering the jean’s zipper was easy; Derek held down the younger man’s rocking hips with one hand while he freed his erection, the zipper-pull tight between his teeth, clicking downward tooth by metal tooth.

“Ah, Jesus fuck, Derek!” Billy gasped, when his pants were finally open.  He arched his back slowly, stretched, and breathed deep.  The zipper teeth dimpled the skin at the base of his cock, but it didn’t seem to cause him any visible discomfort.
Derek smoothed his hands up Billy’s thighs, up his ribs, lightly brushed his nipples.  He dragged his hands slowly back down over warm skin, and folded his fingers into the open waistband of his partner’s jeans, remembering a time when Riddick had split Billy’s pants right off his body.  Humming, he leaned over and sucked wetly across the younger man’s stomach, barely avoided the straining erection that jutted upwards.  “Want to take this over to the bed?”

Billy looked down at him; his eyes glittered.  “Yeah, let’s.”  He swung a leg over Derek’s head and stood in one lithe movement.  Thumbs hooked into the top of the jeans, he shoved them down to puddle on the floor and stepped out of them, leaving them behind as he strolled toward the bed.
Derek watched appreciatively.  When Billy smiled back at him over his shoulder in obvious invitation, he felt something heavy roll in his gut.

Derek didn’t ponder his divided place in the threesome often, but he’d thought about it.  He was the ‘middle’: submissive to Riddick, and dominant to Billy. When Riddick bit down on the back of his neck, it made Derek want to open his legs and sag back against him, completely willing.  When Billy bit the back of his neck, Derek wanted to grab him, throw him face down and jump his bones.
If Derek’s place was divided, Billy’s seemed to be evolving.  He’d bottomed for Riddick always, but lately had shown interest in Derek bottoming for him.
Derek was still undecided.  All he knew now, was that Billy’s narrow-eyed, speculative look had seemed just as much challenge as invitation.  With Billy, just about everything was a challenge.  It woke all the dominant instincts in Derek, infused his thoughts and actions with heightened tension and aggression.

If Billy was aware of the undercurrents stirring in his roommate, he hid it well.  He flopped to his back on the bed, one arm bent under his head, studied Derek as he undressed.  “You’re looking pretty good there, my brother,” he said softly.  “Hard in all the right places.”  He moved on the bed, the barest undulation.  “Why don’t you bring all that over here, and we’ll see if you know what to do with it.”
Derek felt his mouth lift in a smirk, and knew that what had gone on before on the couch was just the appetizer.  This was the meal.
He dove onto the bed and gathered Billy close, relishing the feel of having an armful of warm naked male under him.  He bit and chewed wetly across Billy’s torso, his arms wrapped tightly.  When Derek raised his head to draw breath, Billy grabbed his hair, twisted his head back and stuck his tongue in Derek’s mouth.
They rolled on the bed, Bill’s long legs first gaining a purchase on the mattress, then Derek’s skill giving him the advantage.  Their weights were nearly a match; too close for Derek’s comfort.

Since meeting Riddick, Derek had put on twenty pounds, increasing his weight to one-hundred ninety.  He’d made very sure that it stayed all muscle.  At five-foot-almost-eleven, he couldn’t compete in the height department, not with his two roommates well over six-feet tall.
Billy was tall and thin, but had finally lost that underfed look, and was beginning to put meat on his bones.  With his longer arms and legs, he had the reach over his partner, but no real experience in using it, a fact Derek was grateful for frequently.

Restless hands and twining legs; ceaseless movement…they reversed positions frequently, first Billy on his back, then Derek, hips rocking and grinding together.  Billy raised himself up on hands and knees, used his whole body to stroke and pet, sliding from side to side over Derek’s erection, mouth open, biting and panting against his partner’s skin.
Sex with Billy was rarely a drawn-out affair, so the extra attention was appreciated; Derek stretched under him enjoyably.  
When Billy had touched and teased all the available skin on the front of Derek’s body, he slipped his arms underneath and tried to flip him over onto his belly.  Derek resisted instinctively.
“Roll over,” Billy murmured.  He raised his head a little and stared up his partner’s body, into his eyes.
“I don’t think so.”
“C’mon, I just want to play a little.”

Derek looked down at him, into his eyes: challenge and invitation, as always.  He gave a tight smile, and rolled over.
Billy oiled his hands liberally and began a massage, starting at Derek’s folded arms, moving languidly over his shoulders, and then down his back to his waist.  
For Derek, this was all very pleasant.  Billy had strong hands, and used all his weight to lean into the tight muscles.  The massage moved lower to Derek’s buttocks, kneaded handfuls of soft skin.  Billy slathered more oil down the backs of his partner’s thighs, then quickly lay down on top of him, and that was too much for Derek.
“Okay, my turn,” he muttered.
“Not finished yet.”  Billy slithered over him, side to side.  He pressed his chest hard into Derek’s back, rubbed his pecs across Derek’s shoulder blades.
Derek found himself concentrating on the rigid penis he felt digging into his butt.

One of Billy’s hands slid up Derek’s side, than eeled beneath and smoothed across his belly.  His other hand slipped down to squeeze one ass-cheek, spread it to make room for himself, then he quickly settled back down, cock snugly centered in the crack of Derek’s ass.
Derek came up part-way, hunched over his elbows.  “Enough, Bill; get off.”
“I’m just foolin’ around…”  Billy rocked against his partner.  Both hands reached for Derek’s cock, arms tight around him.  Moaning softly, he sucked on the back of Derek’s neck, while his prick slid up and down, well-lubricated with oil.
Derek tried to roll from under him, but Billy slumped his whole weight against his back.  He tried to force his arms under Billy’s, to pry his hands away, but they were locked tight.  And to judge by the panting moans he heard, his younger partner was really getting off on Derek’s struggles.

Fuck this…Derek managed to turn his hips and get one knee drawn up.  Bunching the muscles of his shoulders and back, he jammed his hands straight down, inside the circle of Billy’s arms.  With one sharp motion, he spread them wide and broke Billy’s hold, levering his hips upward at the same time.  
Billy lost his grip, and his place.  He was thrown up and to the side, and was nearly spilled off the bed.  “Dammit, I said I was just playin’ around!” he growled, as he scrambled for balance.
Derek met him on his back, hands up and ready.  They wrestled and grabbed and tried to pin each other down, teeth bared with strain.  Derek didn’t really think Billy would try to jump him against his will, but had no intention of giving his partner the opportunity.

Billy grabbed Derek’s forearms and twisted them, trying to roll him over.  He threw himself onto his partner, attempting to use his length and weight to overwhelm.
Derek had more muscle mass, and much more skill.  He avoided being pinned by fading back from Billy’s attacks, using the younger man’s momentum against him.  When Billy shot out both hands toward his face, Derek deflected his out-stretched arms sideways, slid from under him, and nailed Billy down with a well-placed elbow.  Billy found himself face-down on the bed, probably with no clear idea of how he’d ended up that way.
Heavy breaths, pants of exertion…holding one forearm tightly, other hand firm between Billy’s shoulder blades, Derek straddled the younger man’s thighs.  Both bodies were slick with sweat.  Cautiously, Derek leaned forward, careful to position his weight to keep his advantage.  Warm, wet, quivering skin; under his lips, under his cock.

Beneath him, Billy ground his face down into the pillow, moaning.  His hips lifted and rolled as he strove for contact.
Derek rocked forward to meet him, rubbed his erection up the divide of Billy’s ass.  Focusing more on pleasure than defense, he relaxed too soon.
Billy erupted beneath him, rolled to his side; both hands shot out and latched onto Derek’s throat.
Derek threw himself backward and tried to force his thumbs under Billy’s clutching fingers.  Billy’s weight came crashing down on him; his breath left him all at once.

The choke-hold was broken easily enough; Derek bent Billy’s thumbs sideways in an impossible direction.  The younger man released his grip instantly, hissing a curse, then resumed the assault.
Arms and legs flailing, biting and clawing, they struggled against each other, each seeking the dominant position.  Derek caught an elbow in the mouth; he yanked his face back as he tasted blood.  “Goddamnit, Billy!  What th’ fuck!”  He shoved Billy away hard.
Billy swung at him, sidearm; Derek blocked it, but wasn’t fast enough for the blow coming from the opposite direction; Billy slapped him across the face.  Derek’s vision hazed over in red.

“You little bastard.”  He was furious in a second, his voice thick with anger.
Billy slapped him again, opposite cheek.  “Come on,” he urged.
Derek was shocked to see him grinning.  “You…” he began, and was slapped again.  “Th’ fuck, Bill!”
“Come on.  Come on, come on, come on!  Let’s go!”
“What, ‘go’?!  What are you talking about!”
“Come get me.  C’mon; let’s play!”

Derek scowled at him, anger giving way to concern.  For Billy, this was play, Derek knew. “I don’t think so…” he said, low, half to himself.  “That’s not what…”  what I want, he almost finished.  What stopped him was a sudden memory of Billy, covered in sauces and condiments, being fucked on the kitchen floor.  The younger man had never said one word of protest, never gave the slightest hint of scorn or ridicule.  He had entered into it joyfully, with complete enthusiasm…because that’s what Derek wanted.
He exhaled heavily, staring at his younger partner, still angry.  
Billy watched him, strung tight, the challenging smile flickering on his face, eyes alight with eagerness.
I don’t know if I can do this…but how can I say ‘no’?

“Alright,” Derek muttered, his voice low and harsh.  He crawled slowly up Billy’s body.  “What do you want?  You want me to fuck you?”  
Billy’s smile widened.  “If you can.”

They both moved to the attack at the same time, chests thumping together, breath hissing between their teeth, each striving for the upper hand.  They grappled on the bed, and Derek’s feet slid against the sheets as he struggled to maintain the superior position.
Billy didn’t relent; if anything, he fought more fiercely than before, gasping and straining as he tried to fend off Derek’s pinioning arms.
And even though his partner struck at him again and again, Derek wouldn’t retaliate in kind.  That was the line he told himself he would not cross.

Derek felt himself fall into a zone, where each attempted strike was something to be avoided, and deflected away in a complicated dance of body twists and hand movements.  He conserved his strength, and let Billy expend all his energy, waiting for signs that would tell him the younger man was tiring.
Billy tried to grab him by the throat again, but Derek had been watching closely; he saw the way the move was telegraphed; it was exactly the same move his partner had tried before.  Derek grabbed both of Billy’s wrists, rolled to put himself on top, then twisted the younger man’s arms together to flip him face-down on the bed under him.  

He felt some tension leave Billy, some tiny relaxation of the younger man’s posture, but Derek didn’t pause.  He yanked Bill’s left wrist out to the side, then bent it sharply up behind his back and held it tight.
“Uhn…dammit…not fair…”
Derek wasn’t having any of it; he pulled up a fraction on his partner’s wrist, freezing him in place.  With his free hand, he pressed down on the small of the younger man’s back and moved himself into position between his legs.  Lust came thudding back as his penis made contact; Derek felt it wash over him in a wave of heat that brought sweat out of every pore.  He slowly leaned down and sank his teeth into the soft muscle at the top of Billy’s left shoulder.  In almost a swoon, Derek closed his eyes.

 He suddenly understood Riddick completely: his need to bite and mark the skin of his partners.  Derek wanted to claim Billy as his own, to hold him down and take him, and leave the print of his teeth all over the younger man’s willing flesh.  He took a deep breath, and released it.  Billy belonged to Riddick.  To Derek, as well, but first and foremost, he was Riddick’s.
Derek contented himself with the single mark of his teeth, and sucking on the side of Billy’s neck hard enough to bruise.

Billy moaned, undulated his hips and spine in clear invitation even as he fought the hold on his wrist.
Derek tugged Billy’s arm a half-inch higher.  “Enough, now.”
“Do me,” the younger man panted.  “Come on!”
Derek judged the distance to the bed-side table, which held all their supplies.  Poor planning, Derek…  Then he discovered he was kneeling on the bottle of massage oil Billy had used earlier.  He picked it up and set the cap between his teeth to twist it open.
Billy seemed to sense what was causing the hold-up.  “No, don’t!  Just…like this.  I don’t need anything!”
“No fucking way.” Derek knew that if he hurt Billy and put him out of action for a day or two, Riddick would probably kill him.
“I don’t!”

Derek began to get a better sense of what his partner craved.  Billy wanted to be forced into submission, and for that, Derek had to play the dominant role and be totally convincing.  “You be quiet and do what you’re told,” he said, shaking Billy’s twisted arm in emphasis.  “And spread your legs,” he commanded.
Amazingly, Billy obeyed.  He turned his head restlessly against the pillow, whispered, “Just fuck me…just fuck me!”
Derek ignored him.  He released Billy’s arm, which he knew must be numb by now.  “You stay put,” he told the younger man.  Opening the bottle of oil, he poured half of it down Billy’s back and over his butt.
Billy hissed in reaction.  “Cold, cold, cold…”
Derek lay down, writhed up and down Billy’s spine, painting them both with oil.  He leaned back and trailed his fingers down past the small of Billy’s back, into the divide of his small, rounded ass.  “Spread your legs wider,” Derek muttered, his voice thick.  He teased the tip of his pinky into the puckered hole, dipped it in again and again.  His cock throbbed so hard it hurt.

“Please…oh, please,” Billy moaned into the mattress, legs thrown wide.
Their play-acting was spiraling things out of control; Derek could feel that they were quickly running out of time.  He inserted an index finger in place of his pinky, trusting the oil to ease its way in.  He circled it, stretching the tight muscle enough to pump into Billy with two fingers.  Sweat dripped down his face; Derek gripped his cock, trying to relieve the throbbing ache.  
Face-down, Billy whimpered between pressed-together lips, his body twisting on the bed.  “Fuck me,” he gasped out.  “Fuck me!”

Derek straddled him, cock in hand.  He lifted Billy’s thigh roughly and pushed forward, penetrating him in one smooth, ecstatic thrust.
“Oh, god!” Billy yelled.
Derek leaned down and sank his teeth into muscle, flicking his tongue over the skin.  “How’s that?  Is that what you want?”
“Yes!  Yes!  More!”
“I’ve got more…”  Derek rocked back, and thrust forward again.  Billy began to struggle under him; Derek held him down one-handed.  “You stay right there.”
“More,” Billy muttered.
This time, Derek added more snap to his hips, increasing the speed of his thrust.
“Ah fuck…more…”
Derek shifted himself up Billy’s body.  He yanked the younger man’s hip a little higher and rammed into him.
“Oh, god…Derek…”
“Like that?”
“Yes.  God, please.”

Again, briefly, Derek thought of Riddick, this time with respect for his daunting control: of himself, and both his partners.  How much was too much?  How to know that this much is damaging, but this much brings perfect release?  Billy was too far gone to trust not to hurt himself; Derek would have to maintain a fine balance for them both.
Derek stroked into him, grunting with effort each time.  Billy begged and pleaded, inflaming them both.  Derek was using almost all his strength, slamming into Billy with controlled force, pausing each time to listen to Billy’s shouts and moans.

He’d just become convinced that he could go on forever, when Billy’s muscles began to tighten…all his muscles.  Derek watched the younger man’s hands bunch, as he dug into the mattress.  The muscles surrounding Derek’s cock clenched as well; he felt his control slip.
“Oh…” Billy gasped, as Derek reached the peak of his thrust.
“Oh…” louder, higher.  Derek snapped his hips forward, cursing under his breath, his penis enveloped in a heated vise.
“Derek!  Oh, fuck!  Fuck me!  Don’t stop!”
A very small part of Derek’s brain yammered at him, holding him back just enough to prevent injury.  He latched onto that surety, and let go.  Falling down onto Billy’s back, he shoved a hand under to grab his erection, and squeezed.  Billy’s shout almost deafened him.
Derek was losing himself; he was riding the crest, biting and sucking on the soft skin of Billy’s neck while he plowed into him faster and faster.

He heard Billy yell again, and twist under him.  It was only because Derek was so close that he heard Billy suddenly speak under his breath, as if to himself: “No, no, that’s not what I want…No, I don’t want it like this…”
Instinctively, without thought, Derek answered him, still firmly in his role.  “Yes, you do,” he growled, hips pumping, “This is what you want; this is exactly what you want…”
It tipped Billy over the edge; he came, yelling incoherently, hot semen spurting over Derek’s hand.  
Billy’s release set his own free.  Derek’s climax followed his partner’s with hardly a second to spare; heat and pleasure blasting up through his belly, all the way up his spine.  He shuddered as his seed pulsed from him, and Billy’s cries vibrated through them both.

When his brain connected to his body again, Derek levered himself up, and managed to crawl to the edge of the bed, where he sat for a moment, waiting for intelligence to kick in.  He leaned over and found a towel on the floor, then stood unsteadily, drying himself off.
Billy rolled over, arms and legs spread wide.  He stared at the ceiling.  “Well.  Fuck me.”
“I just did.”
“Yup.  No question.”
“I’ll take that as a compliment.”
“It is.  Come back to bed.”

Derek crawled across the bed and flopped down gratefully.  He cocked an eye toward Billy.  “Are you still growing?”
“Yes.  Yes, I am.”   Billy grabbed his dick and pointed it forcefully at the ceiling.
Half-reclining on him, Derek turned his face down and laughed against the younger man’s skin.  “Shit, you never get enough, do you?  You’re just a pig for it.”
“You know it, lover.”  Bill humped his hips, lifting Derek briefly from the mattress.  “Wanna try me?”
Derek blew a noisy raspberry on his partner’s stomach.  “You’re a nympho.  And a perve.”
Billy arched his back like a lanky cat, groaned.  “Lower.”

Derek bent an elbow and rested his head on his hand.  The two studied each other for a long moment.
Then Billy reached out one long arm and hooked it around Derek‘s neck.  “Gimme a kiss.”
Derek did so, feeling his partner smile under his lips.  He pulled back and looked at the younger man.  “Everything was all mellow and easy, and then you got me all cranked up…and it turned into wild animal sex.”
“Anytime you want to do me like that, you don’t even need to ask.”
Derek looked down into his roommate’s grin.  “You really confuse me, Bill.”
Billy’s eyes gleamed, heavy-lidded; the smirk on his face widened.  “I know.  That’s how I like it.”