"Good for you, then," Makoto murmured, his voice a low, contented rumble against her sweaty skin.
He patted her head, his fingers getting lost in the tangled mess of her real, gray hair, and kissed her cheek, rubbing his own cheek against hers in a gesture of pure, unadulterated affection.
He paused, a slow, wicked grin spreading across his face.
"Now it's time for you to do the moving." He flipped her over with a surprising, fluid strength, maneuvering her so that she was on top of him.
Yuna's exhausted whimper turned into a sharp, startled yelp as he positioned her, her shaky arms barely able to hold her up.
"Y-You're… insatiable," she gasped, but her hips, as if with a mind of their own, rolled instinctively, taking him deeper inside her with a shuddering, involuntary motion.
Her ruined Ganyu outfit clung to her sweat-slick skin, the delicate fabric a testament to their earlier, violent passion.
Her wig, a forgotten casualty of their war, lay in a sad, blue heap on the floor now.
She glared down at him, a familiar, bratty scowl on her face, but the effect was ruined by the way her lips trembled, by the way her thighs quivered around him.
"…J-Just… one more round," she muttered, her voice breaking as she began to move, her hips rolling in a slow, unsteady rhythm. "A-And then… we're done…!"
But the way she ground down on him, her walls fluttering around his cock in a desperate, greedy pulse, told a very different story.
Her breath came in shallow, ragged pants, her nails digging into his chest as she rode him with what little strength she had left.
"…S-Stupid… lazy... big-bro…" she whined, her forehead dropping to rest against his, a gesture of pure, unadulterated exhaustion. "…You're making me… do all the work…"
"Stupid?" he giggled, the sound a low, lewd rumble in his chest. "You think that little insult is enough to satisfy my kink?"
He pinched her nipples through the thin, torn fabric of her costume, his fingers rolling the hard, pebble-like buds as he groped her breasts. "You'll have to try harder than that, little sis. You know I love it."
Yuna's entire body jerked, a broken, guttural moan tearing from her throat as his fingers tormented her oversensitive, swollen nipples. "Y-You... !!"
Her voice cracked, her hips stuttering as she tried and failed to keep up the rhythm. "D-Degenerate! P-Pervert! I-Incest pig!!"
Each insult, each delicious, degrading word, was punctuated by a desperate, frantic roll of her hips, her walls clenching around him as if she was trying to milk him dry.
Her nails raked down his chest, her breath coming in ragged, desperate gasps as she glared down at him, her eyes hazy with a potent, intoxicating mixture of pleasure and pain.
"H-Happy now, you fucking... ah!... freak?!" she sobbed, her body trembling as she ground down on him harder, her thighs shaking from exertion.
"O-Or do I need to... nngh!...call you something worse?!"
The way she arched her back, her body a taut, quivering bowstring as she chased her own climax, told him everything he needed to know: she was just as into this as he was.
"The beautiful, perfect, little hypocrite." He grinned and thought.
"Do your best," he grinned, his cock throbbing with a fierce, insistent life inside her. "Or your worst. I don't really care."
He loved it all.
"There's nothing that beats having my little sis riding me while she's treating me like a lowly, worthless pig, hehe."
Yuna's entire face twisted in a mask of furious, all-consuming pleasure, her thighs clamping around his hips like a vise.
"Y-You ARE REALLY a lowly pig!" she snarled, slamming down on him with what little strength she had left, her body a conduit for a raw, primal, and deeply transgressive desire.
"A fat, pathetic, disgusting..." Her voice hitched as his cock brushed against that one, perfect spot deep inside her, her body convulsing with a pleasure so intense it was almost painful. "...incestuous animal who can't even fuck properly unless his little stepsister insults him!"
Her nails dug into his chest, hard enough to draw blood, her breath coming in ragged, uneven gasps.
"A-And do you know what the worst part is?!" She leaned down, her sweat-damp hair sticking to her flushed face as her teeth grazed his ear, her voice a low, thrilling whisper of shared depravity.
"I'm just as sick and twisted as you are."
With that final, broken, and utterly honest confession, her body gave out.
She collapsed against him, her walls pulsing violently around his cock as she sobbed through her climax. Her insults dissolving into a series of mindless, shuddering, ecstatic whimpers.
And yet, even as she trembled in the throes of her own oversensitivity, her hips still rolled weakly against his, her body a traitor to her own exhaustion as it chased every last, lingering bit of pleasure, even as she cursed him for it.
"Well, well," he grunted, his own control shattering as he kept grinding against her, pushing her through her climax and beyond.
"Now find a way to make your big bro cum inside you, little sis. I'm almost there."
Yuna's entire body seized up, her back arching violently as she let out a strangled, desperate scream.
"W-Wait...! I c-can't... not anymore...!" Her words dissolved into a series of incoherent, pleasure-filled sobs as his cock dragged against her oversensitive, swollen walls, her thighs shaking like leaves in a hurricane.
But despite her protests, her hands clawed at his shoulders, her fingers digging in as she pulled him deeper, as if she couldn't stop herself.
"F-Fine...! Do it, then!" she gasped, her voice raw and shredded. "B-Breed your disgusting little stepsister like the... ah!...the fucking pig that you are!"
Her nails raked down his back, leaving angry, red trails in their wake as she forced herself to meet his relentless, punishing thrusts, her body a beautiful, perfect traitor to her own exhaustion.
And when he finally spilled inside her, filling her to the absolute brim, she let out a broken, keening whimper, her own climax wringing every last, precious drop from him.
She collapsed onto his chest, a trembling, sated, beautiful mess, her breath a hot, unsteady puff against his skin.
"H-Happy now?" she mumbled, her voice hoarse and raw.
But the way she clenched around him, a silent, possessive pulse, keeping every last bit of him inside her, told him everything he needed to know.
"Hmm, you'll need to up your… insulting game for next time," he giggled, his voice a low, contented rumble in his chest as he hugged her tight, his hand caressing her back in a slow, soothing motion.
"Maybe we can try the lovey-dovey couple stuff every weekend, and the incest-pig-trash-or-whatever-you-want-to-call-it stuff every Friday from now on?"
Yuna's head snapped up, her eyes wide with a mixture of pure, unadulterated outrage and a deep, undeniable disbelief. "You!! You're putting our fucking on a schedule?!"
Her voice cracked, her flushed face twisting in a mask of theatrical indignation. But the way her fingers dug into his shoulders betrayed her, she wasn't pulling away.
She leaned in, her breath a hot, unsteady, and thrillingly promising thing against his lips. "Fine," she hissed, a slow, wicked grin spreading across her face.
"But on Fridays?" Her teeth grazed his bottom lip, a sharp, possessive bite that drew a tiny bead of blood. "I'm going to call you something much, much worse than trash."
Her nails traced the soft, fleshy curve of his belly. "Like a bloated, worthless pig." Her knee nudged his spent, softening cock. "Or… a floppy, useless dick."
Then, just as suddenly, she collapsed against his chest with a shuddering, contented sigh. "The weekends are mine, though," she mumbled into his skin, her voice a soft, almost shy, murmur.
"No insults. No games. Just…" Her voice dropped to a whisper, a raw, vulnerable, and utterly sincere plea. "…just hold me like you mean it, you idiot."