This is a gift for someone, which I wrote half a chapter of and then sort of completely forgot I was working on... whoops.

Story contains bisexual characters doing bisexual character stuff, and incest of both cousin-cest and future sibling-cest flavours. You have been warned.

-HTTYD-

Despite the fact it meant waking up every morning feeling like he was about to boil, Hiccup never considered suggesting that either bedmate stop cuddling him quite so closely through the night. Although 'cuddle' was a strong word for the way Dagur basically slept like a dead weight on top of him, and Astrid was little better. Basically Hiccup had two human-shaped blankets, plus the actual beds duvet. It was little wonder he was warm.

Normally less of an issue, Hiccup really had to pee. He really ought to be sleeping on the edge, given that he had to sit to reattach his prosthetic leg to get out of bed properly, and it hadn't been an issue when he was only sleeping with Dagur. Then he'd met Astrid, and both of them were on board with sharing him. They weren't as entangled with each other, and so Hiccup went in the middle. Hiccup did have an escape trick, luckily. Sliding slowly downwards, he managed to wriggle down the bed until he came out at the bottom of the covers, breathing a sigh of relief as cooler air hit his slightly-sweaty chest. Looking around, he located his prosthetic and managed to get it on before making a quick run for the bathroom, thankfully without peeing himself.

When he returned, both his bedmates were awake and blinking sleepily at him, having noticed the lack of Hiccup in the middle while he was gone.

"Hey, get back here!"

Hiccup chuckled as he clambered back on to the bed, bracing himself for the warmth and greedy hands on his skin as they hauled him back in to the mix. It was still something that gave him pause on occasion; officially, he and Dagur were just roommates. Well, that and cousins. Not many people knew about the fact they'd been dating for a few years, because they knew their fathers - who were half-brothers - would never approve. Living together was an excellent cover for their relationship, and had worked for years. Dagur's room went largely unused, though since Astrid joined in it made for a good "go away" spot when two of the three wanted to have sex, and the third wanted to sleep.

Dagur wasted little time in making his intentions clear, chuckling against Hiccup's shoulder as knowing hands won low, needy gasps. A sharp nip made him shudder pleasantly, big rough hand stroking him to firmness before a smaller hand joined it, squeezing Hiccup's erection. Astrid smirked as he bucked, quite effectively trapped between the two and not really minding. His boyfriend moved and Hiccup protested the sudden chill at his back, Astrid distracting him by leaning down and biting playfully at his nipple before speeding the movements of her hand on his cock.

He heard the bottle click open and shivered in anticipation, body already craving what it knew was coming. Dagur fucked Hiccup almost lazily on his fingers at first, opening him up with no sense of urgency despite the heavy breaths he heard and the precum leaking onto his skin where Dagur's swollen cock was pressed to the back of his thigh. Astrid slowed her hand, working with Dagur to wind Hiccup up into a mildly frenzied state of need.

"Nghhh- stop teasing me!"

Dagur actually laughed, pressed his fingers against Hiccup's prostate to make him shake.

"Says you, who usually considers foreplay an endurance sport."

Hiccup growled as Dagur rubbed him again while Astrid squeezed him teasingly, threatening to make him come before he got Dagur inside him. Finally appearing to take mercy on him, Dagur withdrew his fingers and the bottle clicked again, the slightly sweet scent of the lube enough to make him quiver with lust. He heard the rustling of the condom wrapper, muscles twitching.

"Deep breath love."

Realising he was tensing from anticipation, Hiccup let out a few breaths and made himself relax, and it was well worth the effort when Dagur began to press into him inch by inch, thick enough that the initial pressure took his breath away. Astrid stroked his cock gently to help distract him until Dagur was all the way in, rubbing his side soothingly. If he was looking at his face, Hiccup knew Dagur would have a little smugness in his expression that he was almost too much for Hiccup to take.

Astrid had no trouble, but then Hiccup wasn't exactly small himself so he supposed she was used to it. She only found it almost too much when it was both of them...

A few small thrusts encouraged his body to open up more, the gentle strokes that rubbed against the sensitive nerves inside him relaxing him further as Astrid continued to stroke him. The distracttion of pressure had eased his need a little, brought Hiccup down from the brink but he knew it wouldn't be long before the two of them had him close to that edge all over again.

Hiccup shivered with each of their strokes, Dagur's cock and Astrid's hand, nails in his hip and teeth at his neck, both experts in playing Hiccup's body to the frantic state he was now in, desperate to come and knowing they'd only draw it out further and further until he was a quivering wreck of need. Still, they seemed to feel more merciful than usual that morning, and instead of backing off just before he broke, they upped their movements until Hiccup came with a choked half-sob, squeezing at Dagur's cock and spilling over Astrid's hand as he jerked between them.

He whimpered weakly when Dagur pulled out, soothed by Astrid kissing him sweetly, stroking his hair with her clean hand.

"Good, love?"

"Yeah. Amazing."

"Well, obviously."

Dagur and Astrid answered in sync, then burst out laughing.

"Jinx!"

"Yeah yeah, change that and get over here would ya?"

Hiccup rolled lazily onto his back and stretched, rubbing his leg to ease a knot just above his prosthetic while Dagur changed his condom for a fresh one, then clambered bodily over Hiccup to where Astrid was waiting. He pulled Astrid's hand to his mouth, licking Hiccup's ejaculate off with a lewd grin before pushing her legs apart with his knees. Astrid wasn't having that, leaping up and tackling Dagur until she was on top - a common occurrence almost any time the two had sex was a fight for top. Dagur had breadth and brawn, but Astrid was far stronger than her slim frame suggested, and Hiccup had to quickly shift out of the way before one of them landed on him as the scuffle continued.

Dagur eventually managed to pin Astrid, and she made it clear she wasn't defeated, just horny and keen to get on with the fucking. Laughing, Dagur didn't make her wait any longer. Astrid's hands clutched at his back, leaving angry red lines over the thick muscles there, Dagur making sure not to lie completely on top of Astrid so Hiccup could still watch them. It was easily his favourite view.

They were quick and rough about it that morning - they couldn't stay in bed forever after all - but Hiccup still saw Astrid arch and shudder before Dagur's hips gave those last few bucks before stilling, both gasping and groaning their way through shared orgasms before Dagur dropped heavily onto his back, customary post-coital smile on his face. Astrid pushed sweaty hair up off her face, but she was smiling too.

At least, until someones alarm started going off.

"Noooo. Don't make me adult today."

Hiccup chuckled, shaking his head as he sat up. His lower back twinged slightly, but it was a pleasant sort of ache, the reminder of a good morning to go with the little red marks left by both his lovers mouths.

"Well, I can't make you, but I'm getting up."

"Me too. And, if you get up now, we have time to go for a run. But I guess if you don't think you can keep up-"

That was all it took to have Astrid up, challenge ignited as she climbed over Dagur to claim dibs on the bathroom first. Hiccup chuckled as he watched the two, sorting out his clean clothes since he'd get his chance to shower while they were out on their jog. Sometimes he joined them, but jogging on his prosthetic wasn't comfortable and he had a busy day at work to get through.

Once the door was closed behind two far-too-energetic-for-the-hour joggers, Hiccup had himself a nice, long shower to wake up under, then a peaceful cup of coffee before he started laying out breakfast stuff. Dagur cooked sometimes, but he often forgot Hiccup didn't eat as much as him and overdid the portions. And Astrid... Astrid couldn't cook especially well, and had a tumultuous relationship with the smoke alarm, but she could just about manage not to set anything on fire these days.

Two sweaty, flushed people stumbled back into the flat, arguing semi-quietly (they did have neighbours, after all) about who had won whatever contest it was that morning until Hiccup shut them up with protein shakes and then shooed them off to the bathroom.

"You can share, else breakfast will be cold by the time whoever goes second is done."

Mocking him in a fake-high voice, Dagur rolled his eyes before his usual grin appeared.

"Oh no. Naked Astrid. Whatever will I do to cope?"

"Not hog the water spray. C'mon, I'm hungry and I don't want to be late."

They shared breakfast afterwards, then there was a little manic "I forgot this" and "where is that?" that often came with three of them all trying to leave for seperate places at the same time. Eventually, they managed to get out, Dagur cycling off in his fetching bright shorts and helmet to work while Astrid got in her car and Hiccup headed over to the bus stop. His workplace wasn't that far, and running a second car for the trip seemed less cost-effective than a bus pass, especially since Hiccup got a free disability bus pass on account of his prosthetic leg.

As they were only aware of his relationship with Astrid, Hiccup had to be mindful his colleagues didn't notice him sitting a little delicately (although Astrid had certainly given him cause to herself a few times...) as he settled in for the day at his work station.

His day was uneventful. Well, nothing exploded. Hiccup counted that as uneventful. Bidding his workmates farewell at the end of the day, Hiccup headed home. Dagur had finished earlier, and was already home and lounging on the sofa in his shorts when Hiccup got back. He waved at him, but turned his eyes back to his phone seconds later. Hiccup left him to it, went to get changed and make a cup of tea to unwind with.

"Everything alright Dag?"

"Hm? Yeah. I need to talk to you, but may as well wait until Astrid gets back in..." he glanced at the time "half hour, rather than go through it twice."

"Ok. Anything serious?"

Dagur shook his head, smiled, placed his phone down and began trawling Netflix for something to watch. Hiccup quietly angsted into his tea over the "we need to talk" vibe, but Dagur would have said something if it was bad, he was sure. Still, he counted down the minutes until he heard Astrid's car outside, heard the building door open, echoing footsteps outside before keys in the door and finally Astrid herself.

"Hey guys."

"Afternoon milady."

"Hey Astrid."

Hiccup waited expectantly, ever more curious as he waited for Astrid to change and return to them, flopping down heavily on the sofa at Hiccup's side and leaning over to kiss him.

"Hi."

"Hey. Dagur said he needs to talk to us."

"Oh?"

Astrid straightened up, peering over curiously at the redhead.

"Yeah. So uh. Heather's place just turned up a bunch of problems all at once, and she needs somewhere to stay for a few weeks while her landlord sorts everything out."

"And you want her to stay here?"

Dagur nodded.

"Well, yeah. Our parents place is a little far out for her to commute from, and it would be tough for her to find somewhere else on such short notice and for such a short time."

Hiccup didn't need to look at Astrid to know she was thinking the same - of course they were going to say yes. It was Dagur's sister - which made her also Hiccup's cousin, and she happened to be friends with Astrid too.

"She's gonna have to camp out on the couch though, it would be super obvious to say she can have your room while all three of us share mine."

Dagur frowned, as though that hadn't occurred to him.

"Oh shoot, yeah. She doesn't know... well, we've hidden it from pretty much everyone for years now. We can hide it from her for like, a few weeks right?"

Hiccup nodded. What was a few weeks, really?

-HTTYD-

What could possibly go wrong?