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The headboard groans, but Sonic knows Shadow refuses to break the bedframe. After all, it's brand new.
He could destroy it and the crimson ropes tying his wrists to it, but apparently it was expensive and from a well known local carver. Sonic doesn't care about that- what matters is that Shadow's newest purchase is keeping him trapped on Sonic's knot.
And he'll stay trapped while Sonic pisses in him.
He whimpers through the ball gag- he started crying when Sonic finished, but he hasn't snapped his fingers (the cue to stop. Not that they ever use that cue, or their safeword). His legs have stayed wrapped tight around Sonic's hips since, and he's shaking so hard it would be concerning.
It would be concerning if Sonic didn't know why. It's all part of the plan.
Sonic's fingers tap the subtle bump on Shadow's lower stomach. A gentle push, and he whines and his inner walls spasm. He can't relieve himself like this, plugged by cock and a swollen knot, and he won't until Sonic decides he can.
He doesn't want Shadow's bladder to explode, that would be a massive turn off, but the Ultimate Lifeform can hold it for a long, long damn time. Sonic knows from experience.
It just makes it better when he finally lets go.
"I hope you're ready," Sonic says. "I drank a lot of water too, y'know."
Shadow's eyes widen and he grunts, but he doesn't snap his fingers. They already agreed upon this, despite Shadow's reluctance. He slams his eyes shut and sniffles, turning his head to the side and tensing every fiber of muscle in his body.
He nods. Sonic says, "Good boy. 'm gonna fill you. All the way."
Shadow clenches. Sonic grins, but his smile becomes a look of focus. He hasn't ever tried to piss while his knot is inflated and he's unsure if he physically can, but he's going to try. It takes more effort than he anticipated to relax his body enough to even prompt the sensation. It doesn't want to come out, instinct telling him that now isn't the time to be urinating, but after a minute or so he breaks through the mental barrier. Sonic sighs, presses down on Shadow's bladder, and lets go.
It's a heady kind of relief, even if Sonic isn't in the overfilled, about to burst state Shadow is. Warmth rushes past his cock, seeping out of Shadow's pussy where the knot can't hold it all back, drenching the sheet below (the only reason Sonic is allowed to do this on Shadow's bed is because of the waterproof mattress protector. He agreed to be responsible for the laundry, too- sacrifices must be made in the name of ruining Shadow). Ruining him is exactly what Sonic is doing- the ropes strain, tears bubble out of his eyes and his nose is running, and the noises he makes through the gag are delectable. Sonic sighs, "Feels nice, too bad you can't do it with me."
He's just teasing for the sake of it. To see Shadow glare and cry, feel him quake and twitch. The bed below Sonic’s knees is drenched, he’s not done. Shadow whines desperately like a stressed dog, but he still hasn’t snapped his fingers. Sonic takes this as permission to push.
Squishing his lower stomach causes Shadow to squeak and attempt to squirm away, arms straining until the bedframe creaks warningly and he realizes what he’s doing. Shadow relaxes until Sonic’s fingers put pressure on the same spot, then he tenses up again. Drooling through the gag, he groans and clenches repetitively, muscles twitching as his eyes shut and his hips buck weakly.
“Did you just come?” Sonic asks, already knowing the answer.
“Hnnngh,” more tears slip from Shadow’s eyes. His legs clamp harder. Through the gag he makes an attempt at Sonic’s name, or at least that’s how Sonic chooses to interpret it.
He sighs, finishes releasing himself in Shadow, and says, “That felt good. I bet you wanna go too, don’t you?”
Shadow nods frantically. He makes another muffled, hasty sound. Sonic can feel his heart beating double time through the soft flesh of his body, pulse pounding on his cock, it’s addicting. “Too bad my knot hasn’t gone down yet.”
Shadow growls. It’s not intimidating when he’s crying and drooling on himself. Sonic can take it out, he’s not so massively thick pulling out preemptively would hurt Shadow (and he’d heal super fast anyways, ‘cause he’s the Ultimate Lifeform or whatever), but it’s about the principle of the thing. Letting his knot go down naturally while tucked inside his desperate, angry boyfriend is what he wants, what they agreed upon, and what will happen unless Shadow signals otherwise.
So they sit there.
Waiting. Wet all over.
Sonic grins, riding out mild, pleasing aftershocks. Shadow writhes, panting and whining through the gag, moaning every time Sonic’s fingers skim the swollen skin over his bladder. Shadow fights the ropes and the bedframe until it creaks, then he lets up. He does it again, an animalistic whimper tearing from his throat.
Sonic’s knot is deflating. In a minute or two, he’ll pull out, and Shadow will break. He can make Shadow wait longer, though, and should he? Sonic wants to keep him filled until he’s screaming and contorting his body to get away.
He won’t be that cruel and he can’t, not with biological limitations taken into consideration, but he can be a little cruel. He’ll go soft and his cock will retract into its sheath, but he has Shadow pinned here until it does. He has to make the most of that time.
He taps his index finger over Shadow’s lower stomach, where the bump is. Every single minute touch elicits a spasm. Shadow whimpers, a violent shudder running through his body as Sonic’s hand rests on his distended fur. “I forgot how much you drank, and you can’t tell me, can you?”
Shadow growls again, weaker. He has the strength to glare daggers for a moment, the expression is wiped away by a full body twitch. “It makes a guy wonder if you could drink more.”
Shadow shakes his head and sniffles. Sonic wants to hear him beg, so he says, “Brace yourself,” and leans forward to sneak his hands into Shadow’s bristling quills, finding the clasp of the gag and unlatching it. The second it’s out of Shadow’s mouth, he gasps, “Pull out, pull out, please, Sonic-”
Sonic tosses the ball gag aside and interrupts him to command, “Tell me how much you drank.”
“Sonic, I-”
“How much did you drink, Shadow?” Sonic asks, both hands on Shadow’s lower stomach. He pushes down ever so slightly.
Shadow shudders and whines, “Fuck- three c-cups of coffee, the soda- water bottle- Sonic I can’t hold it pull out please-”
Unless he says “Chao egg” or snaps his fingers, he’s staying put. “Keep begging, it’s cute.”
Shadow releases a breathy, “Please,” and repeats himself louder, then, “I’ll do anything, pull out, I need to go, I can’t- rgh!”
Sonic puts more pressure on his bladder. “You’ll do anything, huh?”
“Yes, please, let me go!”
“Hm,” Sonic pretends to consider it for a moment or two. He says, “Nah,” at the same time his hands push harder.
The noise Shadow makes is divine, somewhere between a whimper and a sob. His wrists jerk forward and the bedframe groans. “Be careful, you don’t wanna mess up your fancy new bed.”
Shadow cries, “Fuck you,” and his back arches off the mattress when Sonic flicks his bladder. “Ah!”
Sonic dedicates his left hand to pushing and his right drifts lower, finding Shadow’s engorged clit. Rubbing it with his thumb, he says, “Oh, that made you tight, huh?”
Shadow growls pitifully, then he shuts his eyes and shakes. He clenches down erratically in the way he always does when he’s coming. Sonic pinches his clit just to be mean and Shadow yelps, “Sonic!”
Teasing him and watching him cry and squirm is so, so satisfying. Sonic would do it forever, but he’s running out of time. His knot is gone and he’s starting to soften, despite how hot Shadow is. “Tell me please again.”
“Please, please, let me go, Sonic please- pl-a-ahhh!”
Sonic doesn’t warn him before pulling out, and that’s all it takes. The dam breaks, piss sprays and Shadow stutters, “O-oh fuck ohfuckohfuck- f-fuck!”
Sonic grabs him by the thighs and forces him to bend until his knees touch his chest, lifting his lower body off the bed. He folds easily and it splashes everywhere- on his muzzle, his chest fur, his stomach. Shadow whimpers, closes his eyes, turns his face away from his own gushing, hissing release, and trembles as he utterly soaks himself.
Holding him in place, Sonic watches gleefully as he pants through his stuffy nose, fluid pooling under his body and soaking the sheet. He adjusts, shoving his palm into Shadow’s lower stomach and grinning as the flow strengthens. It hits Shadow’s face again and he cringes, it drenches Sonic’s hand.
“Hhnnh…”
“That’s good, Shadow?”
He makes a noise that might be a confirmation, it’s mostly a groan. The bump beneath his fur rapidly diminishes and Shadow relaxes as it does, until he’s fully limp in Sonic’s hold. He’s no longer sobbing, the tears that spill from his closed eyes are those of relief. There’s no struggle, just desperately needed release.
Shadow is beautiful all the time, but especially when he gives into instinct.
The way he’s scrunching his face is cute, straining to breathe through his nose and refusing to open his mouth, moaning through closed lips. Sonic giggles at him.
“Don’t wanna drink it?”
Shadow growls in the back of his throat but doesn’t reply, as expected. Sonic jams the heel of his palm mercilessly into Shadow’s bladder just to watch him splash his own face and cringe, but the jet is weaker this time.
It tapers off slowly, his fur shiny black in the places he’s wet (his white chest fur is slightly discolored and flattened by liquid, the tan of his muzzle is darker). The stream stops, he sighs shakily and takes a few more seconds to open his eyes, and when he does he immediately looks away.
“Don’t be embarrassed,” Sonic says softly. He sets his boyfriend down, Shadow makes a face when his back half touches the soggy sheet. “You okay?”
Shadow’s voice is hoarse. “My wrists are sore.”
“I’ll untie you.”
He’s quiet save for his irregular breathing as Sonic scoots up the bed to undo the knots. “You didn’t say if you were okay or not.”
“I’m,” Shadow exhales and speaks very quietly, “tired and satisfied. And disgusting.”
Sonic’s tail flicks happily. “Gonna sleep post shower?”
“After you do the laundry.”
“I didn’t forget my promise.”
The ropes fall away and Shadow’s trembling arms lower as he raises himself. His back is dripping. He’s completely sopping.
It’s hot.
Rubbing the fur above his inhibitor rings where his bindings sat, Shadow says, “Don’t get fluids on my floors. Meet me in the bathroom,” and disappears in a blink.
Sonic complains, “That’s not fair,” and looks down at his wet fur and the puddle below his legs. How does Shadow expect him to go anywhere without getting piss on the floor? He’ll just be fast, it’s his whole thing anyways.
Sonic zooms into the bathroom adjacent to Shadow’s room (hopefully he didn’t leave too many wet footprints) and finds his boyfriend already in the shower. He quickly joins Shadow under the water and flinches at its temperature.
“Yeesh, dude! You coulda warned me it was freezing!” he skitters out from under the spray, Shadow maneuvers around him and takes his place beneath the water.
“I wasn’t waiting for it to warm up,” he says, reaching for his soap with an almost invisibly trembling hand.
Sonic tuts, “Ah ah ah, gimme that,” and Shadow passes the bar to him with a flat look.
“I can take care of myself,” he says, like he didn’t just give up the soap without a fight.
“I don’t want you to. Sit down.”
He does, relaxing with his legs under the (rapidly heating, now it’s getting steamy in here) water, and Sonic sits behind his boyfriend cross legged. He rubs the bar between his hands to gather some lather, sets it behind himself, then he says, “I’m gonna soap you up now.”
“Mhm.”
Sonic starts with his upper back, dragging suds through dark fur and quills. It takes less than a minute for him to feel a soft purr against his fingertips, and he doesn’t point it out in case Shadow gets all bashful and shuts it down. He moves lower and Shadow’s tail does a cute little back and forth, it speeds up when Sonic grips his hips and squeezes.
“Are you still excited?”
Shadow is silent. Sonic says, “Speak up if you want me to stop.”
No reply, his tail is still wagging. He’s probably embarrassed. Sonic braces himself on his palms, uncrosses his legs and shuffles closer until he’s bracketing Shadow, chest to back. Pushing some of his quills aside allows Sonic to rest his chin on his shoulder- they might tangle spines a little, but it’ll be fine. He slides his hands around Shadow’s chest, cops a feel, and then drops lower, until his fingers hover just above his boyfriend’s slit.
Shadow whispers barely louder than the water, “Please.”
“I gotcha,” Sonic’s right hand easily finds Shadow’s clit, and the moment he begins rubbing the hood, his boyfriend shivers and sighs. He leans into Sonic, still purring so quietly it’s inaudible. “Is this good? Do you want more, less, or?”
Shadow mumbles, “Inside,” twitching his hips up. If they hadn’t already gone three rounds earlier, Sonic would be achingly hard.
“Greedy,” Sonic teases, fingers dipping down to his hole (still loose and wet, two digits slide in with ease). Shadow’s breath hitches and he grabs the edges of the tub. Sonic knows all his weak points, the specific circular petting motion he likes that makes him moan and arch his back- which is exactly what he does. His pussy spasms, slick skin pulsing around Sonic’s fingers.
Adjusting the positioning of his hands, Sonic gets two digits on Shadow’s clit and strokes it as best he can. Matching the pace of his other hand, Sonic feels Shadow shiver and his purr becomes loud enough to hear. It’s a little ungainly, Sonic’s fingers bump against each other and the bottom of the tub, but it’s working. “Someone’s happy.”
“Feels good,” Shadow bucks his hips into Sonic’s touch like he can’t help it. “Keep going. F-Faster.”
“If my dick wasn’t sore I’d fuck you,” Sonic says, moving quicker as requested. Shadow’s inner muscles contract and he whines quietly. “You’d like that? If I bent you over right here ‘n’ knotted you again?”
Shadow stammers, “Y-Yeah,” and Sonic’s arousal isn’t enough to create a physical reaction in his body but it’s undeniably there. He grinds against Shadow’s back just for the sake of it, idly humping without real intent. The mild pleasure isn’t for him- he knows it’ll work Shadow up, make him whine for more.
“Faster, please,” he says, like Sonic predicted. He obeys, crooking his fingers up with each swirling motion and delighting in the shuddery gasp he’s rewarded with. “Sonic!”
“Keep saying my name like that,” getting Shadow overwhelmed like this is such a treat. He makes the loveliest sounds.
“Sonic- ah- Sonic, I think I-,” Shadow squirms, a burst of hot liquid dampening Sonic’s fingers. It didn’t come from the shower. Shadow stops speaking words and starts moaning, and he lets go for a second time.
It doesn’t last as long, there isn’t as much, but he’s more vocal as he pisses himself again, whimpering as Sonic’s fingers fuck into him and stroke him in tandem. As the trickle ends, Sonic rasps, “You did so well for me, Shadow. Good boy. Do you feel better now?”
Shadow jerks in Sonic’s hold, making a pathetic little whiny “Hnn” sound and squeezing the fingers inside him over and over as he comes. A final squirt drips down Sonic’s palm and fingers as he eases his boyfriend through the orgasm, gradually slowing his movements until they’re no more.
Shadow quivers and leans back with a sigh, twitching hard when Sonic’s fingers leave him and his arms wrap around his waist. “That was hot, dude. It’s so sexy when you let yourself go.”
“Shh,” Shadow’s hands leave the edges of the tub (there are some hairline fractures in the porcelain, oops), settling over Sonic’s. “Be quiet for a minute.”
“I can’t praise my good boy?”
“Shut up and let me have this.”
Sonic shuts up and lets him have it, but only for a couple minutes. In those minutes, he gently rocks Shadow to and fro, nuzzling him and meeting his boyfriend’s purr with his own. Eventually he says, “We’re wasting water. Let’s finish up in here, I wanna lay down.”
“I have unlimited hot water.”
“Not the point. We’re not falling asleep in the tub.”
“Hmph.”
Halfway through combing oil into Shadow’s quills, Sonic remembers the bedsheets and dreads dealing with them. Maybe he should’ve cleaned up after doing laundry. How is he gonna get those into the washer without them dripping everywhere?
He promised he would and he’s keeping his promise, but that doesn’t mean he’s excited about it. He is excited about Shadow’s soft, sweet smile, though.
Yeah, the laundry is worth it.