Leo’s on his back in his bed, since there’s no way they’re going to pull this shit off in Raph’s hammock, hands gripping the back of his thighs and knees almost against his chin. He’s looking at the ceiling, taking deep, slow breaths like he does in meditation, trying to quell the rising tide of nerves. 
“Easy, Fearless.” Raph’s voice is low and steady in his ear, pitched in that just right way to make Leo whimper. His brother’s fingers are warm and wet inside him, rippling and fluttering until they seem to match Leo’s beating heart. 
“Spread a little wider for me,” Raph whispers, and Leo does as he’s told, because he can do that here, turn off his brain and let his brother use him for whatever he pleases. He lightly braces his heels on the edge of Raph’s broad shoulders, the way he’s done so many times before–but this is different, because it’s not going to be Raph’s cock going inside him. 
Raph’s fingers are pushing together, tangling up, and Leo thinks of his brother flexing his hands before a match. He takes a moment with four fingers slotted together, petting along Leo’s inner walls and rubbing at all the places that make Leo’s breath hitch. Then the thumb starts to push inside, bit by bit, nudging Leo’s slick, aching hole open like a flower. 
“Deep breaths, baby,” Raph purrs. He’s got his face hanging over Leo’s, ragged red mask tail brushing over Leo’s cheek like a caress. “One, and two, and–” 
Leo gasps as Raph’s hand clenches, the shape of the intrusion turning from five bright points into a throbbing mass that sears his nerve endings. He’s full in a way he’s never been before, no matter what Raph’s put him through, and he squeaks before he can stop himself. 
“Like that, huh?” Raph pauses for a few seconds, letting Leo adjust, his free hand petting gently along Leo’s face and throat. His own cock is hard and leaking, but he seems more concerned with Leo right now, eyes flicking from Leo’s face to between his legs and back again like he can’t believe what he’s seeing. 
“Shit, you’re amazing,” he whispers, shifting his hand out ever so slightly before pushing it back in. The brief reprieve somehow manages to make Leo feel even more stuffed and he lets out a strangled churr, squeezing his eyes shut because he’ll go crazy if he has to look at all the want and love in Raph’s eyes while feeling this at the time. 
“Faster?” Raph breathes, and Leo barely manages a nod, heart flipping over as he feels the pace start to pick up. Raph punches in and out of his body, slow and careful in a way that Leo once thought his brother simply wasn’t capable of. 
Raph could kill people with his fists–Leo knows because he’s seen it, seen how bodies come apart under Raph’s blows, even when he isn’t using his sai. Raph is a weapon to the core…except he isn’t, not now, not here, not when the only thing his blows bring is ecstasy. Leo writhes and whimpers about him, babbling nonsense like a prayer while Raph murmurs gently in his ear. His head is hanging low again, close enough for Leo to kiss. 
And kiss they do, right before Raph pushes up against that stop for a heartbeat too long and Leo can’t stop from coming, twisting around his brother’s fist like he wants to keep it inside forever. Raph moans, grinding hard against Leo’s leg, pushing forward far enough that Leo swears he can feel that fist bumping against his own fucking heart.