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The front door to their house slammed shut, making Kaori jump a little as she stopped sauteing the vegetables in front of her, setting the spatula down on the kitchen island.
Her eldest tumbled in, his little brother clinging to the hem of his shorts.
“Sukuna, welcome back.” She greeted, wiping her hands on her apron. All she got was a grunt in return as he tossed his backpack onto the sofa, hand clasped around his brother’s soft, pudgy wrist.
“You picked up Yuuji, too? Thank you.”
“We’re going to wash up.” He declared, not giving so much as a look back at her before tugging the small boy into the bathroom, leaving her to clutch her cheek and sigh.
He was at that age where he was rough, mean, in his second year of high school yet still as cold as he was when he had first hit puberty.
It was times like this when she liked to think back often, think about her glowing, carefree baby, before he became the contempt-ridden teenager he was now. The way he would smile up at her, ruddy cheeks and tiny teeth that could barely lisp out the word ‘Mama!’.
One thing hadn’t changed, though. He was always attached to his little brother, from the moment he laid eyes on him. A ten year difference between them, yet they acted like they were twins. Their hands fit into each others like puzzle pieces, and Sukuna was reluctant to let that go.
She shrugged. Ultimately, it worked in her favor. The two of them looked out for each other, and who was she to try and stop that? Humming, she went back to the food, sizzling on the stovetop. Her boys would surely be hungry.
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“Yuu.” Sukuna sighed, breathing heavily as he tugged at his little brother’s clothes. “Strip for me, Yuuji.”
Yuuji let out a small groan, grimacing before pulling at his pants urgently, his elder brother’s hands all over him not helping his situation at all. Sukuna helped him with his shirt, letting his lithe arms slip through the holes with ease.
“Were you good for me, baby?”
Yuuji nodded, legs pressed together and eyes squeezed shut.
He had drank at least two full bottles of water at school, and made sure not to go to the bathroom the entire day, just as Sukuna had told him to.
It was painful, his tiny bladder screaming for relief non-stop towards the very end of the day. He even let a few tears slip loose when Sukuna had come to pick him up, discreetly clutching at his crotch the entire bus ride home.
It was all worth it when he looked up to see a warm grin on Sukuna’s face, eyebrows turned up sympathetically and a hand rubbing at the corner of his mouth.
“Oh, I knew it.” He pressed a kiss to his baby brother’s forehead, ignoring the way he fidgeted constantly, unable to keep still nor stop his shaking. “Yuu-kun’s so good for me, always listening to his older brother properly.” His hand slinked forward, caresessing Yuuji’s small, slightly pudgy stomach, making sure not to press in case he couldn’t manage the pressure.
“You know what to do, right Yuuji?” Sukuna continued affectionately, fingers itching to reach up and tweak at his baby’s chest, but unwilling to risk having to clean up an unwanted mess.
They had only done this once before, and Yuuji hesitated, biting his lip and looking down.
“Can I do it another way?” His voice was tiny, wobbly. Scared of upsetting the older boy, and rightfully so. Sukuna’s face twisted at the arrogance.
“No, Yuuji. You’ve made big brother very, very happy so far. Don’t screw it up now.”
Yuuji’s eyes grew wet, shiny with unshed tears, large brown eyes peering up at him.
“Please, Nii-chan. It makes me feel like a girl.”
Sukuna tamped down the urge to roll his eyes, forcing himself to be gentle just this once.
“Yuuji, baby, that doesn’t matter.” He soothed. “If I say I want you to do it, you do it. OK?”
Yuuji shook his head ever so slightly, tiny hands clutching at his side like he didn’t know what to do with them.
“Get in the tub, Yuuji.” Sukuna gave his voice an edge to it, a small threat that his brother was sure to pick up on. Fear colored Yuuji’s face. Combined with the desperation he was already facing, he gave in. Climbing over into the cold ceramic, shuddering ever so slightly as his little dick brushed against the edge, he sat. Knees pressed together, facing his brother who crouched beside him, eyes taking in the sight.
“Yuuji.”
Yuuji flinched. Sukuna’s voice was cold, a reprimand. His patience was slipping, and should it leave him completely only Yuuji would suffer for it.
Slowly, he spread his legs, parting them and settling his feet on either side of his hips, canting his groin up ever so slightly. A pleasant sigh finally left Sukuna, a small chuckle as he propped himself up, hovering over his little brother almost protectively. He had a clear view of it all, not even a hint of his little brother could hide from him.
“Let it out, Yuu.”
Sukuna drank in his Yuuji’s whimpers, the way his abdomen tightened before he let go. His small cock twitched as a dribble slipped out, followed by a steady stream, landing on the side of the tub’s walls and slipping down, forming a puddle around the boy. Sukuna almost pulled away when some landed on him, only to inch closer, unable to look away.
Yuuji’s eyes rolled back from the sheer relief, finally able to relax himself. His tongue slipped out, mind completely lost to the world. He couldn’t even register the way his body was soaked in his own piss. Where normally he’d try and move out of the way, he let himself lay there, hands settled at his side, doused.
After a couple of moments, he was finally done, ass flush against the bottom of the tub and eyes closed, wishing to be ignorant to his situation just a little longer. To bask in how empty his head was for once, floating like he was finally free from it all.
Sukuna groaned as his baby finished up, gush of fluid petering out, leaving him tired and gone. Palming himself through his uniform, Sukuna panted, drool slipping out from the corner of his mouth and landing on Yuuji’s chest, rising and falling with shallow breaths.
He nearly came the moment he saw those pebbled, puffy nipples, bright red and practically begging to be bullied. A sheen of sweat covered him, Sukuna’s sick mind going crazy with the fact that his sibling was covered in fluids, so wet and warm and just for him. Yuuji was made for him.
With a gentle touch, he grabbed Yuuji's limp, wet hand into his own, using his other hand to pull down his boxers and the front of his pants in one go. The combined warmth of their fists around his cock, the way Yuuji’s fingertips didn’t even meet when wrapped around him. It all pushed him over the edge, cum spurting out and coating Yuuji in yet another one of Sukuna’s claims, a leer covering Sukuna’s face from ear to ear at the very thought.
It took a moment for both of them to come down from their respective highs, Yuuji’s nose wrinkling at the state he had managed to get himself in. With precarious legs, he got up, reaching over to turn on the shower while Sukuna lay, resting his head on the cool white edge.
He could finally be at ease as water washed away any evidence of what they had done, fatigue seeping into his arms and legs. Sukuna himself began stripping, grabbing all their clothes and haphazardly tossing them into the nearby laundry basket.
Yuuji blushed as his older brother joined him, the air fragile and quiet as he was dwarfed by Sukuna’s height, his broad shoulders and muscular arms. He loved his brother so much.
Shyly, he stood stock still as Sukuna began scrubbing, stopping only once to pepper kisses on Yuuji’s bony shoulders, ignoring the ensuing giggle when his little brother felt ticklish.
As soon as they were clean, Yuuji was whisked away to their shared bedroom, Sukuna carefully picking out a pair of shorts and his favorite T-shirt, dressing him like his very own doll, clasping his arms like they were made of porcelain. Only then did the two go downstairs, sitting next to each other at their dinner table.
Kaori smiled at the two of them, setting down a large pot and plates for the three of them.
“Look at you, Yuuji, all clean.”
The boy shifted from side to side, trying not to look at Sukuna, knowing the look on his face would raise unwanted questions.
“Yeah, thanks Mom.” He mumbled, ignoring the hand that had started crawling up his thighs, sizable fingers covering almost the entire thing. A heat settled into his gut.
“Big brother helped me out a lot.”