"Fuck, Fearless," Raph groans in his ear, words a strangled rasp as his hips snap in and out. "You're so good at this." 
Leo stiffens, caught off guard--he can't remember the last time Raph praised him like this, the last time anyone did, really. The words buzz along his skin, scraping at his insides not unlike Raph's cock is, and he whimpers, louder than he has before. 
Raph notices, of fucking course. "Mmm?" He slows his pace--Leo's on his stomach, but he can imagine the bastard cocking his head. "What was that?" 
Leo bites his lip, trying to pull his thoughts together enough to deny it. "Everything okay, angel? Do you need something?" Leo squeezes his eyes shut, turning his face into the coolness of the pillow. 
"Need me to tell you how wonderful you are, maybe." Raph's pace picks up, his voice twisting into a groan. "How obedient, how accommodating." Shit, Leo's so hard it hurts, his breaths coming painfully fast. "How well you take care of me, just by lifting this pretty little tail." 
He caresses said tail, just pets it, really, barely anything compared to what Leo's done to himself, but for the pleasure still makes Leo lightheaded. He squirms on Raph's cock, not sure if he's trying to get away or press closer. 
"You wriggle for me so well," Raph purrs. "And the sounds you make..." Raph brushes a hand up Leo's throat, over his voice box. "We outta sell them, sweetheart, we'd make millions." His cock gives a particularly aggressive thrust, like he's forcing the words a bit deeper inside. 
Leo closes his eyes, tries to rally. "Go..." He swallows, licks his lips--fuck, is he drooling? "Go fuck....yourself." 
"Fuck myself?" Raph asks, undoubtedly raising an eyeridge because he's a bitch. "Why, why would I fuck myself when I've got this tight," thrust, "hot," thrust, "perfect," thrust, "little ass?" thrust. He slumps over Leo with a groan. "Specially not one attached to the best, cutest little turtle in the world." 
Leo closes his eyes, breathing hard. It's hot, it's so hot, but it's hard not to feel foolish listening to it. He's not cute; Mikey's cute, maybe, with his round freckled cheeks, Donnie with his long pretty legs, and Raph himself is drop-dead gorgeous. But Leo's got scars all over, he's got a bad leg, he's not cute and he's not good and Raph wouldn't be here if Leo wasn't up for anything-- 
"Hey." Raph places a firm hand on the back of his head, like he knows about the thoughts that are sneaking up on Leo right now and he can just push them away. "You think I'm a liar? Is that it? You think your brother's a no-good liar, spewin' shit he don't mean?" 
Leo bites his lip. "i..." 
"No, I ain't a liar. You got that?" Raph smacks him on the ass and Leo jerks, nods. "I don't want you thinking any of that garbage, okay? In fact..." He gives another long, steady push, rubbing against Leo's spot in that horrible/perfect way. "I don't want you thinkin' bout anything at all. You got that?" 
It shouldn't be so easy, but at this moment, with Raph's fire inside and around him to keep him warm, it is. "I got it," Leo whispers, and his voice is shaking, but he's not lying. 
"Good boy," Raph whispers. His hips slide in and out, in and out, in time with the words he dribbles down like honey. "Good boy, Leo, so good for me, so sweet, so fucking tight, aaah..."  
And he doesn't stop, and he doesn't hesitate, and he doesn't make it into a joke. Even after they push towards the breaking point he doesn't stop, just holds Leo and whispers "Good, good, you're perfect, you're a dream, darling," as they both shudder into oblivion.