Thread by @Tmnt_bb

#tcest #leotello
So, Donnie's been working himself ragged for a while, getting snappy and annoyed with everyone for no reason, all because he's been stressing himself out over his own deadlines. Normal routine, right? Well, no actually, because this time, he has a solution.

Or at least, somewhat of a solution. It turns out all those articles saying masturbation is good for helping your muscles relax and loosen up are entirely true! Which is great cuz he's been getting some serious cramping while he sits at his desk.

That could also be his god-awful posture but shhhh he's not thinking about that right now.

So, here he is, shuddering pleasantly on a bullet vibrator gently attached to his clit. It's on a low setting, and he's not working on any machinery, he's not /that/ stupid.

He's just writing up first draft blueprints, ones he'll be sure to revise and look over when he's not softly whimpering from small rhythmic licks of pleasure, perfectly distracted and slightly rocking his hips against the chair. He's probably leaking slick all over, but it's fine

He'll just clean it up later.

Just as he's reaching his first slow-building, gentle orgasm of the night, his annoyingly, coincidently perfectly timed twin comes busting into his lab, the door swinging open with a loud slam.

The sudden interruption of Donnie's focus and calm state of mind cruelly rips him from his orgasm, just before he can reach it. It makes him justifiably annoyed, but he can't really say anything, can he?

Telling your twin he just ruined you vibrator-induced orgasm is... eugh...

So Donnie just groans in annoyance, louder than he typically would in this situation, and turns to glance at his brother still standing in the doorway.

He looks a little concerned, and suddenly Donnie feels just how sweaty he is. How twitchy and uncomfortable he probably looks.

The realization brings those licks of pleasure back with a vengeance, the attention and risk of getting caught only somehow making it feel better. More intense.

Leo, despite looking concerned, waltzes inside like he owns the place, like always. And it hits Donnie...

Leo's gonna be here for a while. He's gonna be here, watching Donnie, annoying Donnie, touching and poking and trying to get a rise out of Donnie.

Donnie. The turtle who currently has a bullet vibe attached to his clit. A vibe with no way of turning it off, save for the button.

Which rests on the side of it.
In Donnie's pussy.
His dripping, spasming, pleasurably aching pussy.

...

He is /totally/ fucked isn't he?

This isn't done but thank you @turtlefuckin for the DELICIOUS idea. Ypu're brain is a treasure trove of sexy incestuous plot bunnies, I am forever grateful.

https://twitter.com/turtlefuckin/status/1657670090937040902?t=xyIv26ETR4VIWl7ZeBpjJA&s=19

Donnie watches with anxious anticipation as Leo slams the door shut once more, striding up to him with that typical cocky smirk on his face. Those lidded eyes.

Donnie's always found Leo attractive physically, though he's definitely not the only one.

It hadn't been too much of a problem before now, where all he had to do was get some alone time and either work until the horniness went away, or finger himself silly. Either way it would be handled relatively easily. But now... Now this was an interesting situation.

He had to physically shut his eyes and bite his lip when his twin draped over the back of his chair, arms loosely laying on his soft, already sensitive plastron.

This position wasn't new at all for them. In fact, it was rather common. But now, with how turned on he is...

Oh boy...

"Heyyy~" Leo sang, voice purposely high and slightly grating on Donnie's ears. Or, it would be, if he wasn't so rediculously horny and aching to be touched.

Now his voice just sounded whiny and seductive, drifting through his ears and into his head like a siren's song

It made Donnie feel both intensely submissive and fiercely dominant at the same time.

He was already getting close again.

Leo seemed a bit extra peeved by his silence, oblivious to his plight, and resolved to break his composure. He'd done it a thousand times.

He could do it in his sleep.

So he smirked and wrapped his arms around Donnie's torso and-

Oh... oh /fuck/

Donnie's eyes fluttered as those warm, caloused hands pressed against his sensitive belly area, how those arms encased his shaky shoulders...

Oh god...

Donnie had to shove Leo away and curl on himself, had to bite into his arm, just to stifle his high-pitched mewling moan as he suddenly came. His body shook with the force of it, eyes rolling back and legs twitching, a gush of slick rushing out of him.

God his pussy was spasming and clenching so hard-

The vibe was drawing it all out, making his very core tremble in pleasure. /Fuck/ he felt so good, why did this suddenly feel so good?

He was barely able to use his last bit of lucidity and rational thinking to keep himself from rocking his hips, his pussy against the chair. Against that damn vibrator driving him crazy. He's almost certain in that moment Leo will realize what's happened.

But thankfully, all that managed to come out was a deep, drawn out groan. If someone didn't know better, they'd immediately assume it was from pain, not pleasure, and to Donnie's subsequent relief, Leo fit that category.

His twin seemed to freeze at being shoved away so harshly.

His eyes snapped all over Donnie's body, how it shook and trembled, how he bit into his arm just to keep quiet, how he curled into himself.

Something /had/ to be wrong with him.

So he jumped into action, stepping in front of Donnie and pressing at his face, his forehead.

Was he sick? He knew he looked like it when he walked in, he should've said something, dammit-

As Leo's hands pressed around Donnie's face, feeling his forehead, cupping his cheeks, Donnie whimpered. Those vibrations still hadn't stopped, why would they? They weren't mystic.

He was already feeling oversensitive now, body continuing to shake and tremble under those almost painful, pleasurable vibrations. He felt a few tears stinging his eyes, the overstimulation already making him desperate to turn it off.

But his pride was too valuable.

He couldn't let Leo know he just came! That he just came to Leo's touch, his expression, the way he moved and spoke... he'd freak out! Be grossed out beyond belief, as he should.

Donnie had to find a way to play this off, to get Leo to go away, at least for a few minutes.

Leo was still feeling his forehead, and while not /feverish,/ it was still a bit hot, so he gently cupped his twin's face, trying to get him to look at him.

His concern only spiked at Donnie's eyes being rolled back, that couldn't be good, and he tried to get his attention.

"Hey, hey Dee? C'mon lookit me, I know it probably hurts, but you gotta look at me." He said gently, softly.

He knew how sensitive Donnie got when sick, so he made himself sound as calm and reassuring as possible.

Donnie on the other hand, was internally panicking.

Of /course/ Leo would assume he was sick. That annoyingly considerate bastard. Normally that soft tone, when he wasn't sick, would just feel condescending for him, but right now, having just had and orgasm and already on the road to a second... shit...

He finally got some control over himself, though it was increasingly difficult as he steadily climbed to another peak, and he looked directly at Leo, butterflies erupting in his stomach at the praise the action earned.

"Yes! Yes, that's it Dee, just look at me, there we go."

Why did it feel so good to be praised like that? By Leo of all people. Sure, compliments were nice, but this felt... different.

He wanted more, though he refused to acknowledge why. Leo, meanwhile, was still blabbering away. Voice comforting. Soothing.

Dammit...

"That's it Dee, can you tell me where it hurts? I know your just making noises right now, and that means it's /really/ bad, but I gotta know where it is before I can help."

His voice was so gentle, so loving and soft... /fuck/ he was so messed up, wasn't he?

"You don't even havta say anything, gestures are fine too. I know words can be hard in moments like these."

He suddenly looked down, eyes sparking in recognition.

"You're hugging your stomach, is that where it hurts? Is that the worst part?" He reached towards Donnie's abdomen.

Donnie cried out and jerked away fiercely, not wanting Leo to touch him. To make him mewl like he could already feel the urge to.

Leo froze in his movements, reassessing what he should do from here. Donnie obviously didn't wanna be touched right now, that's expected.

But how can he check his stomach area if he couldn't press? Couldn't touch and feel for any abnormal bloating or solidness? He had to feel, but he didn't want to hurt Donnie any more than he already is.

Dammit, this was gonna suck.

He suddenly surged forward, pulling Donnie's arms away from his stomach and pinning them to the seat of the chair with his knees. Effectively straddling his twin.

His twin immediately yelped and shook even harder, eyes squeezing shut. Fuck, Leo hated this.

"Hey hey hey, I know Dee, I'm so sorry, but I have to check, I'm sorry-" He apologized profusely, gently smoothing over Donnie's face, trying to soothe his twin.

"It'll be okay, I know it hurts, but I'll be done and off before you know it, I promise."

Donnie only keened back at him pitifully, still shaking hard enough to make the chair creak back and forth. Leo hated this part of being a medic, he /hated/ it. How he had to do it all, even if it hurt. Even when they cried and pulled away.

He shuddered and soothed Donnie as best he could as he reached down, gently pressing and feeling the clenching muscles of his abdomen. Suddenly, there was a high-pitched, absolutely /filthy/ moan from Donnie, and Leo froze.

Donnie continued to jolt and shake violently beneath him, eyes rolling back, mouth hanging open and drooling... Holy fuck...

That was /not/ a moan of pain.

Leo marveled as Donnie had an orgasm under him, under his touch. As he mewled and trembled through it.

He watched in awe as his twin fell apart, as he continued to flutter and shake after the orgasm leaned off, eyes glazed over in pleasured tears...

Leo could feel his dick twitching and swelling in his slit, bulging his plastron.

"H-holy... Holy fuck..."

He couldn't manage anything else, watching as his twin struggled for lucidity. He finally managed to tear his eyes away from his twin's face, only to look down towards his crotch instead. His thighs were clenched together, tense beyond belief, and Leo suddenly ached to see.

To see what was hidden between them.

He spread his legs a little wider, still keeping his twin pinned, and gently pushed Donnie's thighs apart, letting his jaw drop at the sight of his gushing, violently twitching pussy.

"F-fuck Donnie, why-"

Suddenly he realized where he was, just what he was doing and to whom, and immediately pulled his hands away.

His legs stayed where they were.

He couldn't keep himself from looking down again, looking closer to see... a /vibrator/ buzzing away at his twin's clit.

Suddenly he didn't care anymore, thoroughly entranced by Donnie's gorgeous cunt, and brought a hand back down to it, this time tracing the lips and gently pressing against the vibrator.

Donnie immediately reacted, entire body spasming violently as those vibrations kicked up.

Leo pressing against the vibrator had accidentally turned it up a notch, while also pushing it harder against his clit, making his brain short-circuit. His voice cut between a sob and a moan a tthe sudden intensity shift, and he desperately rocked into it.

He was oversensitive and aching, painfully pleasured, but he couldn't stop himself. He didn't even care that it was Leo anymore. Leo obviously didn't seem to care all that much.

So Leo continued to press against the vibrator, pushing it more firmly against the clit.

Effectively grinding what was left of Donnie's mind to mush.

Leo leaned in, thoroughly transfixed by how Donnie reacted to his touches. How his eyes lost focus and recognition. He looked amazing, delicious, he looked...

"Fucking beautiful..."

Donnie positively keened at him this time, long and loud and openly desperate, though for what even he couldn't tell. How could Leo resist such a display?

He pushed forward fully, lips pressing and moving against Donnie's, tongue laving at his twin's lips gently.

And Donnie didn't even hesitate, opening his mouth wide and moaning lewdly as Leo pressed in, curling his tongue around his twin's, running along his teeth, nipping at the chapped lips.

He didn't even mean to move the vibe, but he accidentally turned it.

He felt the up and down buttons. He didn't even hesitate in pressing the up.

Donnie lit up, and his eyes rolled back once again as he hit another peak, crying out and sobbing against Leo's lips. He couldn't even think like this.

He rode it out, voice cutting and rising and falling sporadically, pathetically, matching every clench and spasm of his overstimulated pussy.

Leo pulled away, watching in sinful curiosity as Donnie hit his third high of the evening.

They hadn't even had dinner yet.

Leo felt almost possessed as he moved away, finally unpinning his twin's arms, only to pick up his legs and force them against Donnie's chest, bending him in half.

He dropped with a loud *schulk* body trembling in anticipation as he traced Donnie's gushing cunt with his tip.

"So hot, so beautiful, you look so fucking hot right now Don, please. Please let me fuck you, please." He whispered desperately, leaning over Donnie, still in his chair, panting into his shoulder.

He slowly slid his hand up and down his cock, already desperate.

Donnie nodded up at him instantly, and Leo pulled back a little, suddenly concerned he was taking advantage.

"Nonono, D-Dee you gotta tell me to, ask me to fuck you, you gotta say it please-" If Donnie couldn't, he wouldn't, but god he wished he could.

Donnie shook, still suffering from the vibrations on his clit, and Leo suddenly realized why this might be so difficult. He finally took off the vibe, turning it off, before leaning close to his twin again. He pressed their foreheads together as his twin caught his breath.

"P-please Dee, fuck, you look so fucking pretty right now, please-" he whispered, practically whimpered, right in front of Donnie's face. He wanted it so bad, he thought he might die if he said no.

Thankfully, he didn't. Instead he did something so much better.

"P-please Leo- Y-yes- Y-yes Leo f-fuck me please-!" His twin whined oh so beautifully, and Leo didn't think he could say no even if he wanted to.

He pressed his cock against Donnie's still twitching cunt, before pushing in, reveling in how /easy/ the slide was.

Either Donnie had done something more penetrative before this, or he was just /that/ sopping wet, but fuck it felt perfect.

Those walls gripped and rippled around his cock so well he actually whined into Donnie's neck, matching his twin's needy sob.

He sounded so good like this

"F-fuck Donnie, fuck-!" He gasped desperately, unable to keep himself from bucking in pleasure.

He'd never been inside another person before. Sure he had fleshlights, but this was so much more intense. The way it all massaged his aching cock had him mewling in no time.

Crying out desperately into Donnie's neck, bucking and trembling sporadically into his tight pussy. The display was actually quite pitiful, but Donnie was so sensitive it didn't matter. He just sobbed and moaned as his twin used him for his own pleasure.

He came one more time as Leo finally managed a decent, slamming thrust into him, hitting his g-spot and pumping him full, only a few minutes after he first pressed in.

Donnie didn't give a shit. He was too busy sobbing and drooling through his fourth orgasm /to/ give a shit.

Leo meanwhile felt like he was losing his mind, eyes nearly crossing as Donnie's tight, almost mind-numbingly good pussy clenched down on him unforgivingly, sucking him dry as he pumped out his load. His hips twitched and quivered as he rode it out, clinging to Donnie desperately

He could hardly think, much less form words, and he was pretty sure Donnie felt the same, if the small whimpers and intense shaking were anything to go by.

When they finally calmed down a little, Leo was slumped in the chair on top of Donnie, head tucked into his neck.

Donnie had his arms curled around Leo possessively, still panting a little, but managing to place small pecks and gentle kisses to the skin of his twin's neck, mind clouded with bliss.

He and Leo had always been... abnormally close, and even he could admit how weird this was...

But... it felt so good. Holding Leo close, Leo holding him back just as tightly. Churring against each other lovingly, nuzzling their cheeks together and reveling in their shared bliss and... love.

God, what was wrong with them?
Donnie didn't know, and honestly, he didn't care.

This felt too good to be bad, and if it was, why did it matter? As stated before, they were always abnormally close, he's sure no one would even notice if this became a regular thing.

God he wished this would become a regular thing.

It was so warm.

So comforting.

When Leo kissed him, when their lips pressed together once more, he effectively melted. He hated touch usually, but like this, from Leo? He'd never felt more blissful.

Is this what Heaven felt like? Fuck, he thought so. What else would feel this amazing? This transcendant?

Leo couldn't pull away. He couldn't force himself to pull away. Donnie just tasted so good on his tongue... his lips, his neck, his sweat and saliva... God Mikey could never best it. Could never even hope to capture the pure bliss that came with Donnie's taste.

Part of him ached to taste other places too. His arms, his sides, his hips and thighs... the slick that seemed to endlessly dribble from his slit. That seemed to have gushed like a waterfall earlier, in their heat of passion.

He wants to taste. To touch. To hold.

He's never wanted those things before. Ever. For anyone. Much less his twin brother. But the thoughts of his tastes and sounds and smells, they crushed any of his lingering doubt before it could bother festering.

No guilt or shame or self-doubt could survive between them.

They never went to dinner that night.

The insistent knocks on Donnie's lab door went blissfully unheard until their brothers gave up.

It's not like they wanted to see what was happening inside anyway.

Probably...

Most likely...

Leo hopes so, Donnie is too good to share.