"Donnie?"
"'One minute." He stares fixedly at the computer, hoping he'll be left in peace.
He is not. "Doooonie." A hand spider-walks up his arm, another up his shell.
"One minute, guys, ok--gaah!" Someone grabs hold of Donnie’s chair and abruptly swings him around, forcing him to confront April's Do Not Fuck Around face and Casey's I'd Love For You To Fuck Around face. "Seriously?"
"As a heart attack," April says sweetly. "Do you know how long you've been shut up in here?"
Donnie turns the question over in his mind, and doesn't like the answer. "Can I get a lawyer first?"
"Nope." Casey plants a soft kiss on his forehead. "You're going straight to prison, baby. Cell block taaaango..." He wriggles his hips.
Donnie rolls his eyes. "Is that so?" He settles his weight more firmly in his chair, giving them both a skeptical look. "I'd like to see you try."
April and Casey exchange a glance, and Donnie's lightning-quick mind recognizes the oncoming danger exactly too late to do anything about it. They each grab one of his mask tails and yank.
"Gah!" He falls forward, caught off guard, and that’s all they need to haul him out of the chair and out of the lab, into the main room. Mikey watches idly as Donnie's dragged past the pit, stumbling and cursing.
"Mikey!" Donnie calls, raising appealing hands to his little brother. "Help me!"
"Nah, dude, I'm good," Mikey says, before turning to put on his headphones, the jumped-up little shit. He gives Donnie a wink and a thumbs-up, and Donnie fires back with a middle finger (or rather, he points his index finger at the ceiling, but hey, a turtle works with what he has).
They don’t let go of his mask tails until they’re inside his room, April pausing to lock the door while Casey neatly topples him onto the bed. "That was fun," he says, pulling off his shirt to expose his binder. "We should do it more often."
Donnie sits up with a hiss. “Seriously? I have so much to do, you could at least--”
And then he stops talking, because April and Casey are staring at him with devilish grins, each hefting a brightly colored, very distinctly shaped object.
"Okay." Donnie swallows hard, mouth suddenly very dry. "Okay, um..."
Casey chuckles. "What'd I say? Like magic." He taps Donnie's snout with his hot pink strap-on. "Bibbity bobbity boo! And the grumpy turtle becomes a needy little princess."
"Fuck you," Donnie says distantly, unable to take his eyes off the toys. He's had Casey's a few times before, but never April's never both at once. And in Lovelace's name, he has never wanted 
"Actually, I think we're--"
"Can we not resort to cliches, please?" April cuts in, already busy getting out of her clothes. "And Donnie, relax. You know as well as we do that you can't stay chained to your desk forever." She gives him the warm smile that's been making his knees week and utterly fucking up his self-control since he was fifteen. "This is for your own good."
She's right, to be honest. But more importantly, she's got a butter yellow strap-on that seems to be calling his name, and the willingness of Donnie's mind is rapidly crumbling before the weakness of his flesh.
Still, he makes a point of grumbling as he strips out of his gear, flicking his arm wrappings at their heads. Casey responds with a pair of flung boxers, and April with a slingshotted bra. Then they're all flinging clothes at each other, giggling like idiots, until Casey grabs a tin of lube from the dresser and sends it sailing neatly into Donnie's hand.
"Come on, baby," he croons, reaching to buckle on his cock. "Open yourself up for Mommy and Daddy." And God, there's probably a whole psychology textbook's worth of reasons for why that makes him even more ridiculously hard in his shell than before, but Donnie doesn't care about any of them right now. 
His lovers gather around the bed, eyes shining and strap-ons bobbing between their legs. Donnie squirms under their scrutiny as he pours a glob of lube into his hand, instinctively pressing his thighs together.
"Nuh-uh," April says, reaching down to gently tug his legs apart. "We want to see you, sweetheart."
Him. They want to see him. These two beautiful, wonderful people, who could have anyone they wanted, have jammed themselves into this room with too many books and too many pictures of Einstein (oh, the things that man has seen) to watch the gigantic turtle freak finger himself up the ass.
Sometimes Donnie feels like his life is a dream, in that he's not sure it's real. But even a mind like his would have trouble finding the capacity to dream this up.
He carefully slips a finger inside himself, feeling his already red cheeks flare even hotter as he starts to stretch himself. One of them, he can't tell who, lets out a soft sigh. Their hands are rubbing over his legs, petting at his thighs. Casey pauses to tug his ankles farther apart, and Donnie sucks in a breath at the sensation.
He's letting out breathy little churrs by the time he's halfway through, and he can literally smell how much that turns them on. April rubs her cock against his thigh with a groan, fingers drumming lightly over his skin.
He's so hard but he can't--won't--drop. Not until Casey rolls his eyes and reaches up to pat Donnie's straining bulge with a little huff. Just like that he's spilling free, dropping into their eager hands.
"So pretty," they whisper, and he wants to laugh at how ridiculous it is for them to call his big, lumpy purple cock pretty--only it doesn't seem that ridiculous in their voices. Nothing does.
By the time he's decided he's opened himself up enough, Donnie's trembling with arousal, and they've barely even started. He pulls his hand free and gives a shorty, shaky nod.
"Hands and knees, Donnie-boy," Casey says. A stupid name, but Donnie likes it way too much for his own good. He scrambles into the proper position, letting them arrange him so that he's facing the headboard. It takes a herculean effort of will, but he manages to keep his tail from wagging (okay, maybe it wags a little, but he's under duress).
Casey settles in front of him, cock lightly brushing his face, April behind. "Ready, babydoll?" she asks. Her hands brush over his skin, buzzing ever so slightly as she reads his emotions.
"Ready," Donnie whispers, wrapping his lips around the head of Casey's cock. It tastes way too good for plastic.
She sinks inside him, slow and torturous, and Donnie churrs, letting the vibrations travel up Casey's length. Casey groans, legs flexing as his hands scratch across Donnie's scalp. The toys are curved to rest inside them, moving when Donnie moves, picking up on the aftereffects of his pleasure.
At first they move so slow, and it's torturous, especially on April's end. Donnie grinds back on her, letting out pathetic little whines around the cock in his mouth.
"So eager," she whispers, with an unmistakably sense of wonder in her voice as she rubs his haunches.
"Come on, Donnie," Casey whispers, digging his shoulders into Donnie's shoulders. "Show us how much you want this."
And he does, rocking back and forth between their cocks, sucking and wriggling his hips and doing all the things he's supposed to be too dignified for. He's the warrior, the doctor, the scientist....only he's not, not right now. He's just their needy, submissive body.
They love him. He can hear it in their soft groans, in the sweat dripping off their bodies onto his. And he knows because they tell him, breathing it in his ears over and over again. "Love you, Donnie. Love ya, egghead." The words seem to melt together, swallowing him in a safe, warm blanket.
He can't speak with Casey's cock in his mouth, but he answers with his body. He can look up at them with eyes open and vulnerable, he can let them use him until they come, one after another. They rest for a few seconds, panting, and then they start all over again.
Their hands pet down his sides and cock, scratch his shell, and he can practically feel the thoughts falling out of his head. The world shrinks down to the touch of their hands, the heat of their bodies slapping against his, their voices blending with his own.
Occasionally he can hear them kissing him over his head, the sound squishy and comforting. Their interlocked fingers drag across his body, scratching at his scales.
Eventually, April's pace picks up, sending them all rocking farther and farther forward. The bed is creaking like mad, although it's more a case of Donnie feeling the vibrations rather than actually hearing it over the wonderful noises they're all making. He's suddenly very glad Mikey decided to wear the headphones.
Faster, faster, and their hands are rubbing over his own length. Donnie grits his teeth, doing his best to stay focused, to concentrate on their pleasure. It's harder than he expected, but the fresh swirl of their pleasure in his sensitive nose as they both climax all over again.
After that, he can't help himself anymore. April and Casey's fingers intertwine as they both wrap a hand around his cock and Donnie's coming, drenching their fingers in white. He lets out a wail, slumping forward, and Casey quickly withdraws his cock so he doesn't choke.
April waits until Donnie's back on his knees before she does the same, planting soft kisses on the back of his neck. He stays hunched over in the afterglow, staring at his slack hands as he listens to them put the strap-ons away.
"Good time?" Casey asks, gently lifting Donnie's chin.
"Good," Donnie says. And then, as he slowly starts to collect his thoughts, "But I do need to go back to work--"
But that's all he can say before they're both tackling him to the mattress again. He might have been able to shrug off April's or Casey's weight, easy, but it's quite a bit harder than they're both piling on him at once, and pulling blankets over themselves at that.
"Should I have expected that?" he mutters from where he's got his face half-shoved into the pillow.
"Probably," April says cheerfully, patting him on the ass. She and Casey exchange high-fives over his head.
"Jerks," Donnie groans, but he's smiling when he finally drifts off to sleep.