The ball is a cheery sky blue, because apparently the temptation of seeing Leo in his colors was overwhelmed by Raph’s desire to mock him like this. The rubber surface is more resistant to his teeth than Leo expected, and there’s enough of it that he feels the faintest trickle of drool. 
Straps dig into the sides of his cheeks–less uncomfortable than he’d feared, but not exactly uncomfortable. He reaches up to adjust it, only for Raph to slap his hand away. Leo rolls his eyes but doesn’t try again. 
“Well, now.” Raph lifts his chin, turning his head from side to side. The feeling of being inspected like this makes Leo’s stomach twist in odd ways and he resists the urge to lower his gaze demurely. “You look as pretty as a picture, big brother.” He pats his lap. “C’mere.” 
Leo does as he’s told, carefully settling his weight across Raph’s broad thighs. His brother had a growth spirit at the tail end of their adolescence, unfortunately, and now he looms over Leo, peering down like the world’s horniest Santa Claus. 
Speaking of…Leo shifts slightly, feeling something big bulge beneath him, and swallows around the gag. Yeah. That part of the growth spurt, he doesn’t mind so much. 
“Why dontcha say something, Fearless?” Raph asks. Leo glances back up at him, eyes narrowed in confusion, and his brother smiles that fucking smile of his. “Go on,” he teases. “Give me an order.” 
Oh, for the love of… Leo lets out a muffled sigh. “Go fuck yourself,” he orders crisply, or tries to, but it’s kind of hard with a mouthful of rubber. 
“Huh?” Raph cups a hand to his earslit because he’s a drama queen at heart. “What’s that you say? You want me to bend you over and fuck you till you cry?” 
It’s painfully hot, of course, but Leo’s still kind of ticked. He considers a middle finger, but that’s not really feasible at the best of times for them and right now he doesn’t want Raph to get a good look at how badly his hands are shaking. 
So, he tries a different option. Leo shifts slightly, flipping his tail aside and maneuvering himself into the perfect position to jam his already-slick hole down on Raph’s half-stiffened cock, letting warmth slide into him like the reverse of a hot bath. 
The effect is instantaneous. Raph jolts in surprise, gripping Leo’s shoulders, his mouth flying open with a surprised churr. Leo bats his eyes demurely and circles his hips, tail fluttering down to wrap tightly against Raph’s. 
He recovers quickly, though, narrowing his eyes and seizing Leo by the shoulders as he jabs upward with a short, sharp thrust. Leo lets out a squeak before he can stop himself; the sound is muffled somewhat by the ball, but still unmistakable. 
Raph blinks, shrugs. “Hmm. Not as good as the full-on thing, but what the hell.” He tucks his hands under Leo’s ass and hoists them both upright, driving himself even deeper. Leo squeals around the gag and grabs on for dear life, dignity scattered to the winds as Raph carries him over to the bed. “I could get used to it.”