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“Nezuko…”
Tanjiro lightly shook his sister by the shoulder, hoping she was still awake. She rolled over immediately in the cramped space of their tent, pink eyes gazing up at him sleepily. Nezuko didn’t keep her muzzle on when it was just the two of them, and she chirped in question, nuzzling her face against his chest.
Tanjiro swallowed, thighs clamping together in need, “Can you help me?”
Nezuko blinked, taking a moment to register what he was referring to. He squirmed while she considered, feeling guilty for getting his little sister to help him with such a thing. But her eyes lit up with excitement when she caught on, and she hummed in affirmation.
Tanjiro felt her body stretching in size against his, filling him with anticipation as she crowded around him in the limited space. She pushed his shoulder gently, implying he turn over. Following her direction, he turned around, shuffling until they were pressed with his back against her soft chest. Nezuko let him use one of her arms as a cushion while she trailed the other down his body slowly, over his chest, across his hip, hooking a finger under the waistband of his pants. He held his breath as she wasted no time in pulling them down, exposing him to the cold night air.
Her nose was buried in his short hair, nuzzling around his ear comfortingly. He trembled as warm air from her parted lips tickled the back of his neck, and she placed a kiss there to soothe him.
Tanjiro found it difficult to pleasure himself, having never had the time to learn what he liked between raising his siblings and fighting demons. And he didn’t have anyone else to turn to, nobody but Nezuko knowing the sort of body he had. So when she had woken up one night to him with his hand between his legs, achieving no results, she had done what she thought any sister would. Despite Tanjiro being unsure with this development, he soon warmed up to it, seeking her out on the nights when it couldn’t be ignored.
A hand pulled at Tanjiro’s hips, arching his back so his cunt was on display from behind, and he pulsed again around nothing. Fingers trailed up the back of his thighs, almost tickling him as goosebumps raised on the flesh there. He wriggled his hips impatiently, trying to entice his sister into giving him what he wanted.
Nezuko giggled, licking the shell of his ear as she finally brought two cold digits to where he wanted them. As her fingers swiped through wetness, her breath hitched, and Tanjiro whimpered, burying his face into her arm to keep his voice down.
Inosuke and Zenitsu were only sleeping a couple of feet away in their own tents. Tanjiro didn’t want to be caught in such an inexcusable situation by their friends.
Nezuko continued to pet him between the legs, spreading the wet he’d produced over his folds and clit. Not applying enough pressure for anything to build, only providing some relief to the ache. She pecked kisses along his neck, humming happily as she served her big brother in the way only she knew how.
Eventually, he grew restless, grinding against her hand a little harder. She took the hint, pressing against him with more force. He muffled a whine as she moved to cup him, heel of her palm rubbing against his leaking opening while her fingers circled his clit. The arm under his head curled around his neck, as though to pull him in a headlock.
Nezuko altered the movement against the bundle of nerves, faster, slower, back and forth, taking it between two digits and tugging on it lightly. Feeling him jerk in her hold as he sought out his peak. When it seemed like he might be reaching the end, she’d slow down, easing the pressure so he’d growl in frustration.
Something about seeing her brother wound up in such a lewd way had Nezuko clenching her own thighs.
“Nezuko, please,” Tanjiro panted, tears in his eyes as he looked back at her.
She smiled innocently, cocking her head in question. Her fingers moved from his clit to his opening, the tips dipping in slightly. He sucked in a breath, angling his hips to allow better access.
Slowly, almost painfully so, she pushed into him a little before pulling out and repeating the process, a few centimetres more each time until she was knuckle deep. Tanjiro was shivering, his thighs tensing with the beginning of a cramp. He tried to relax his legs as she pumped her fingers a few times, drawing out and flicking her damp fingers against his clit before plunging in again.
Although pleasurable, Tanjiro was once again trapped in a limbo of being unable to cum. Aggravated by the teasing, he suddenly flipped around, pushing a shocked Nezuko onto her back and mounting one of her muscular thighs.
“Wanna cum,” He grit out, rutting his wet cunt against her leg.
Nezuko pursed her lips, feeling her clothes growing damp both between her legs and his. While she thoroughly enjoyed taking care of her brother and prolonging his pleasure, she couldn’t deny it was also nice when he took charge.
She placed her hands on his hips, guiding him back and forth as he humped against her. Tanjiro’s face was flushed, lips parted and eyes closed as he focused on chasing his release. His hands fisted in Nezuko’s kimono, short pants spilling from his mouth as he shook his hips eagerly. In this position, his leg rocked against her just enough for her to seek out her own end, and her head fell back, quiet moans leaving her.
It didn’t take long for them both to fall over the edge, thighs clamping around each other. Tanjiro bit into his lip to muffle his cry, Nezuko throwing a hand over her mouth. Still, small whines could be heard from them both as they shook with satisfaction.
After stilling for a moment, Tanjiro collapsed in a heap on top of his sister. She wrapped her arms around him, rubbing his back and chirping as if to praise him. He let her comfort him, a feeling of contentment and love bubbling in his chest. Tucking his head into her neck, he planted a kiss there in thanks.
Now exhausted, the Kamado siblings finally fell asleep, appeased after providing for one another.