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Mumbo is deeply aware that the time is quickly ticking by on how much longer they can stay hidden together, as Team STAR is definitely expecting him back soon - well, hopefully - and might get suspicious of him being the mole if he’s gone too long. He’s pulled out of his thoughts with a grunt as Grian tugs him into a kiss by his tie, easily melting into the familiar rhythm with his boyfriend. It’s quickly turning heated and desperate, leaving him certain that the scarlet macaw hybrid is also well aware on the time limit over their heads. He shudders as there’s the warm press of Grian’s tongue against his bottom lip, asking him silently to let go and enjoy their time with one another through parted lips. He lets out a soft whine as his scattered train of thoughts halts altogether once their tongues press together and he moves a hand to cup his jaw, petting the soft down feathers near his ear wing with his thumb. He practically purrs at the muffled chirp the soft minstrations get him, and he really can’t help it. Grian’s feathers are so utterly soft under his thumb and his boyfriend sounds so pretty as the kiss breaks so they can remember to breathe.
“
You’re such a pretty bird
.” He whispers, panting quietly against Grian’s spit slick lips.
“Aww.. thank you. How sweet.” He nods after admiring him for a few moments, basking in the comfort of being with his boyfriend. His little moment of lovestruck fondness is ruined as the swirls of arousal make themselves known with a twitch of his cock as he’s kissed just as fiercely once more. Mumbo moves his free hand to a freckled hip, slowly pulling him closer and closer until their hips slot together. He’s whimpering quietly as he’s made aware of how painfully hard he is when Grian suddenly grinds against him, breaking the kiss with a needy whine. His cock is on the more sensitive side, even through his layers of clothes, and it’s easy to rile him up.
He’s ended multiple makeout sessions with Grian in the early days of their relationship because he kept getting hard, and they hadn’t discussed sex and sexual boundaries just yet.
As he’s ground against again for attention he moves the hand from where it’s been playing with his down feathers to tug at his very ugly G-Team uniform desperately.
“Excited, love? Give me a tick.” He teases and lets go of his tie, and Mumbo responds with little huff of embarrassment. "
You
.. you can’t expect me
not
to be when you sound so pretty..” He mumbles, shuffling back against the wall of the cave to let Grian work on removing some of his uniform. He’s moved his hands back to his chest, nervously fiddling with his tie as he watches the avian slowly undress. They haven’t actually had sex yet, with both of them being busy throughout the season and Grian adapting to the environment on Hermitcraft. They’ve humped one another before and he’s fingered the shorter man, but nothing farther. He’s always been very nervous about having sex with Grian due to the factor that he hasn’t had sex with a transmale partner before.
He doesn’t want to hurt the avian or make their first time a bad experience. He lets out a startled yelp as he’s suddenly pushed against the wall and shoved onto the floor, ripped out of his thoughts by force.
“
Grian?!
” He whispers frantically, assuming someone’s come past or something happened nearby. Mumbo is more than a little confused when he’s straddled instead.
“
Hush,
someone could hear us.” He nods, taking a shuddering breath to calm himself down when there’s suddenly a press of clothed heat against the bulge in his slacks and the air is stolen right out of his lungs. He whimpers pathetically, hips jolting instinctively to try and chase the warmth that was pressed right against his aching cock.
“
Oh- oh fuck-
” He curses as he’s given exactly what he’s been silently pleading for.
“Can I ride you, Mumby?” He nods frantically, shifting to try and remove his belt and unbutton his slacks when his hands are being gently grabbed and placed on Grian’s bare hips. He allows the movement, taking another deep breath as he rubs his thumbs into his pale skin with slow circles.
“I didn’t hear you, love. Can I ride you?” The question being repeated finally clicks with the lack of any further movements, and he stutters over “yes” as he gives verbal consent. He feels a bit silly for thinking Grian would allow him to just nod instead of verbally consenting considering it’s their first time. He truly doesn’t ever remember the reasoning behind wearing such well-fitted and tailored slacks when they get so painfully tight whenever he gets hard, but a small part of him revels in the sharp spikes of pleasure that the tight fabric gives with every shift.
He realizes he’s gotten lost in his foggy thoughts when he hears a soft gasp from Grian, forcing himself to tune back in. He briefly wonders if the chilly cave air got to him, ready to move and grab his long discarded jacket so he doesn’t leave the winged blonde shivering, before he hears him speaking. "Oh.. oh, Mumby, how were you hiding this monster from me?" He blinks a bit, confused as he rubs Grian's hips before flushing darker — if physically possible — as he stumbles over a response once the words click in to place that he’s referring to his cock. He isn't given the time to formulate any sort of coherent or stuttered response with Grian pulling his overly sensitive cock from his boxers and slacks. He doesn’t remember when his belt was discarded nor his pants unbuttoned, but he doesn’t care as calloused fingers are moving to spread his pre over the head of his uncut dick.
“Oh.. oh gosh, Gri..” Mumbo whines, shuddering as those fingers move to loosely wrap around his cock and start a very leuiserly pace. He both hates and loves the teasing strokes, as it’s keeping him from the edge and making him twitch and squirm with desperation. His hips buck into the warmth of his hand with a moan as his grip tightens slightly and his pre is spread over his cock as a makeshift lube. "Oh that’s.. that feels wonderful..” He whispers, melting into the cave wall as his hips continue to try and rock against his hand. "Does it?” Grian coos softly, the sound sweet and birdlike, but with hints of something a tad more teasing underneath. He whimpers as the hand is pulled away, letting out a choked sound as the delicious touch is removed.
“Why did- why did you stop?” He asks confused, and grows further confused when his boyfriend stands. The movements click into place as he watches him shimmy down his pants and boxers. He moans low in his throat at the sight of a slight wet spot that’s formed on his light grey boxers, his cock twitching as he realizes everything has had just as much of an effect on the avian. He sits up and leans forward, helping Grian get his clothes below his knees to give him more range of movement. He settles back down with his back to the cave wall, still mostly clothed with just his shirt unbuttoned and belt gone so his cock can be easily pulled out. He won’t admit it, but he finds it extremely hot when his boyfriend is partially or entirely nude while he’s fully or barely undressed. Something about it riles him up in ways that leave shivers down his spine and a dark flush across his cheeks.
“How.. how will.. How are we going to..?” He trails off bashfully, unable to ask how exactly they’re going to continue forward and fuck.
His anxiety over doing something unsexy or unpleasureable or painful is getting to him again and bringing him to fiddle with his loose tie. He lets out a shocked gasp as his boyfriend straddles him once more and grabs his cock, pressing it right against his wet folds. The wet warmth has his hips bucking and cock heavily twitching with a high pitched whine as he grows even further desperate for him. He starts panting quietly as he thrusts against him, letting out pathetic little noises of pleasure. "Please- please fuck me Gri?” He whimpers, sounding absolutely wrecked already. He’s so horribly embarrassed as he watches the realization dawn on Grian’s face that Mumbo doesn’t know how to fuck him properly. "You don’t know how to fuck me, do you? How cute.. Don’t worry Mumby, I’ll make us both feel good. Just relax and let me ride your beautifully big cock.” The compliment following the light degrading has him fiddling more with his tie, unable to control how how dick twitches.
Mumbo tries to respond with anything other than a shamed whine, but his boyfriend has other plans. There’s suddenly a hand covering his exposed cock and pressing down, bringing him to spread Grian’s folds and press against his smaller cock. He watches lovestruck and entranced as he lets out a whine followed by a trill as his pretty tricolored feathers fluff, displaying his arousal through his wings as well as how he’s covering his shaft in his slick. He remembers when he was studying avian hybrids in order to properly court the man straddling him and discovered a few chapters entirely dedicated to wing body language. The fluff of his feathers brings a soft blanket of relief as well, glad to see him actually enjoying the situation as much as himself. He’s panting harder as his cock is pressed as close as possible to his cunt, and when his head catches on his wet hole he moves his hands to Grian’s hips and squeezes with a drawn out whine.
“
Please please please- please!
” He begs, desperate to sink into the heat his crown keeps catching on. His breath catches in his throat as his pleas are answered and his cock is being held in place as the avian’s cunt practically pulls him in with every little movement. "
You’re so tight.. So warm
.” He rambles, unable to keep his hips from jolting as he sinks further and further down his length. He’s been told he’s big before, but he never quite understand how that would affect his sexual partner until now. He listens to every trill and chirp and moan as his boyfriend eventually becomes fully seated on his cock, leaving him twitching inside his cunt and gripping his hips with white knuckles. He’s likely going to leave bruises in the shape of his fingers from how tight his grip is as he tries his hardest not to cum already. He’s doing his best to hold Grian still, not wanting to cum yet. It’d be mortifying if he came just from bottoming out and he’d be teased absolutely endlessly.
“Are you alright?” The soft spoken question is laced with concern, and Grian’s brows are furrowed as he brushes his hair out of his eyes with a fond and gentle touch.
“Trying- trying not to cum..” He admits, unable to look at the blonde as he’s cooed at and fawned over.
“Oh sweetheart.. Do I really feel that good? You must be so close if you’re holding me still like this. You’re such a good boy, not cumming without permission.” The words have his cock jumping as he hides his face in the crook of his shoulder with a whimper. He didn’t know he was that into praise, as praise before hasn’t affected him on such a physical level. Normally praise makes his heart skip a beat and a warmth spread through his chest, but being called a good boy has a heat spreading through his tummy as he rocks against him. "You're just so sensitive.. it's cute. Maybe I'll make you cum just from warming your cock." Grian giggles at his reaction to the mere suggestion, as it draws out a loud whine and has him wrapping his arms around his middle.
He moans as his boyfriend continues to ramble about different scenarios and scenes, leaving him panting and whining as he squirms under him. He’s brought out of his spiraling fantasies when he hears him let out a rather loud chirp, one that sounds different from the others. He’s confused as he feels a faint external pressure against his dick, shifting and looking between them. He gasps softly at the sight, seeing the faint outline of his cock bulging Grian’s tummy before letting out a low groan and wrapping his arms around his middle to pull him as close as he can.