Casey wakes up and immediately knows that no, his calendar was not wrong and the testerone has only been able to do so much. He shifts with a groan, rubbing his aching stomach and doing his level best to ignore the warm, damp feeling between his thighs.
"Stupid uterus," he mutters at the ceiling. "Go 'way." It doesn't, sadly. Wriggling into a binder helps a little, but not much.
Luckily he doesn't have work today, so at least he doesn't have to be a cranky, leaky mess in front of his boss. Of course, the little sucker isn't going away by the time he does have to get back to his job, but that's a problem for Future Casey.
Present Casey is more concerned with dragging himself out of bed and shambling to the bathroom, doing his best not to look down at himself as he washes up. Going to the bathroom is a particularly nasty process, what with dealing with the tampon he made himself insert last night and the smell of fresh blood in the air.
But he grits his teeth and suffers through it nonetheless. It's fine, really. He'll finish off the ice cream and watch some lame TV and tick down the seconds until this shit is over, and he'll be fine.
He's making his way out of the bathroom when he hears the soft murmur of voices from the living room. Did he leave the TV on? He doesn't think so....
"Guys?" He blinks at the sight of two turtles gathered around his coffee table, carefully setting out a smorgasbord of different goodies. It's the guys, it's his guys, his Raph and Donnie.
They turn to him as one, nostrils flaring ever so slightly. Shit; can they smell the blood? Casey blushes, caught off guard by a rare flash of self-consciousness.
He's not alone in that, at least. Donnie shuffles his feet, hands behind his back. "We, uh, knew you were under the weather, and we didn't want you to be alone--"
"So we thought we'd help ya eat your feelings," Raph finishes, gesturing to the table. Casey can see a fresh tin of ice cream, cookies frosted with smiley faces, and a pack of chocolates. He stares. "This is for me?"
"No, it's for the other dumbass with shitty biology." Raph rolls his eyes and tugs Casey onto the couch. "Now shuddup and get ta work on those cavities."
"We brought Airplane!" Donnie chimes in, turning towards the TV. "And I've got Advil and Tylenol if you need any, just say the word."
Before Casey knows it, he's on the couch with his turtles snuggled up on each side of him, wolfing down sweets like there's no tomorrow. "You got Mikey to make these?" he wonders, licking frosting from the cookies off his fingers. The ice cream and chocolates are clearly store bought, but the cookies have Mikey's flair.
"It was nothing," Raph says. "Donnie just had ta get him another dildo, that's all."
Donnie huffs. "Which he wouldn't need if he and Leatherhead didn't keep breaking the goddamn things..."
They'd planned this. That's what Casey keeps coming back to as he digs into the ice cream, watching the soothingly familiar gimmicks of Airplane! roll across the screen. They'd planned this in advance enough for Mikey to make the cookies, they'd calculated the exact time his cycles were supposed to start, and they aren't even making a big deal of it
A warm surge of affection curls through him at the idea, at the sense of two solid, loving bodies resting against his, holding him up, and demanding nothing in return. And with that feeling comes a very naughty idea
Before he has a chance to second-guess himself, Casey turns and licks Donnie on the neck.
"Gah!" He just, flushing in that adorable way the turtles have. "Case--"
Casey gives him an impish grin. "You guys wanted to distract me, didn't you?" Before either can answer, he twists around to give Raph a big, sloppy kiss.
Raph leans into his touch, only to pull away, eyes worried. "You sure about this, Case?"
Casey rolls his eyes. "I've got two adorable hunks in my living room and you're asking if I'm sure?" He grabs a chocolate from the box and pops it into his mouth. "'Ome an' 'et it, 'oys," he croons.
They're on him in an instant, the greedy bastards, just as he knew they would be. Casey leans back, lets them plant hungry, sugar-filled kisses all over his face and neck. Their already sweet-tasting tongues are even sweeter, now, and he swallows them down hungrily.
Raph bends down, lifting Casey's shirt to nip and suck along his stomach and the curve of his abs. Casey moans softly, reaching down to gently scratch the back of Raph's shell the way he knows the turtles love. Raph churrs, his nose fluttering as it rubs along Casey's skin.
His hands slip into Casey's pants, cupping and rubbing his ass. Casey squirms at the touch, grinding desperately into Raph's big calloused hands. Raph takes care not to go too far down, to not do anything that would remind Casey of blood between his legs.
Not to be outdone, Donnie lightly drags his teeth along the curve of Casey's jawline, until he can oh so carefully tug at Casey's lip. "Open wide," he whispers, and Casey does, only for Donnie to turn around, pop another chocolate into his mouth, and turn back to Casey with a shit-eating grin. This one is mintier than the last, and Casey gasps on the sharp, clean taste.
Donnie's free hand slips down to join Raph in playing with Casey's legs. Their fingers weave together as they rub back and forth, shifting Casey around on the couch. God, he could let them grope him like this all day.
The hairs on the back of his neck are standing up now, pleasure swirling in his gut. His body may not be perfect, but damn if Raph and Don don't know how to operate it like nobody's business.
Not that Casey's any slacker in that department, himself. While they're distracted with how he shudders at their greedy mouths, Casey lets his hands stealthily wander up their thighs, between their legs. And yep, they're both hard, twin bulges trembling under his hand. He squeezes, and is rewarded with two ringing churrs.
"Casey," Donnie moans, legs flexing as he drops down. Casey leans over with a smirk, planting a soft kiss on Donnie's cock. "Mmm," he purrs. "Tasty."
Raph's exposed now, too, and when Casey turns back around he pauses lick some up some frosting before rubbing a delicate little tongue across Raph's length. A drop of precome spurts into his mouth, salt mixing with sweetness.
"So good of you to bring me such nice, big snacks," Casey purrs. Raph rolls his eyes, but his face is flushed and his eyes are shining.
Don's hands touch Casey's hips from behind, carefully pushing him word. He understands what's being asked and slips onto his stomach, ass in the air, letting Donnie delicately at his exposed hole.
As for his other hole, it wraps around Raph's cock, sucking and puffing at the tender flesh. Raph's fingers gently rub along Casey's spine and belly, massaging the warm flush of pleasure building in his stomach. 
He knows exactly what gets Raph going and he isn't slow about it, wanting to have his next treat as quickly as possibly. When Raph comes Casey laps up the glistening white fluid hungrily, rolling it around in his tongue. Raph tastes so sharp and pure, so alive.
Then he's turning yet again, letting Raph tend to his ass instead so Casey can look after Donnie's poor, trembling cock. Again, he doesn't make him wait, running his tongue over the most sensitive spot with keen accuracy into he's bathing with cleansing cum.
By now Casey's own cunt is aching, but the feeling is far less uncomfortable than it was when they started. He could probably stop now if he wanted, but he can see in Raph and Donnie's shining eyes that they're more than ready to give him more, and Casey wants to receive it.
He lets them sit them back up, running gentle hands over his thighs. "This okay?" Raph asks, and Casey nods, trembling as they reach into his pants. They tease his outer folds, careful not to mess too much with the bloody central pass. The next time his body lights up. it's not with fear or self-loathing, but with pleasure.
Casey sinks into their arms with a groan, lets them kiss him and each other, pouring the last of the semen he's swallowed into their mouths. The salty-sweet taste of all the morning's goodies pass from mouth to mouth, sealing them into the same gentle haze.
Afterward, they just sit and hold each other, gently nuzzling as the movie continues to play. "Thanks, guys," Casey murmurs. He doesn't feel perfect, but this is definitely the best he's ever felt during one of his cycles.
"Anytime," Raph purrs.
"You're our treat," Donnie says, and it's cheesy as fuck, but he says it so earnestly (and it makes Casey feel so good) he just snuggles closer.
"Y'know," he mutters. "This shit's gonna stick around for a while. I'm going to need some serious long-term care." He gives them both a significant look; his eyes are merry, but his hands tighten on their shoulders, because he really doesn't want them to leave right now.
And they clutch him back just as tightly, laugh and smile, tell them they'll stay as long as he needs. He looks into their bright eyes, seeing the truth there, and it's the sweetest thing he's seen all day.