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"mom says we shouldn't do this anymore."
"Moms a fucking creep."
"Suku-nii! Don't call Mom a creep!"
"What yuu? It's true. She's the one that started this shit."
It was true and he couldn't deny it. He was laid under his brother, on his brother's bed with his legs spread open wide to accommodate his brother kneeling between them and holding a long thick dildo that they had taken from their mom.
She had started grooming the twins years ago to be closer than average, encouraging their co depenance to worrying degrees and it all culminates in the relationship they had now.
She said they were only supposed to do this when she was in the house, so she could make sure they were safe.
But Sukuna was insatiable with the early onset of puberty and Yuuji was dragged along with it.
Sukunas favorite activity was to stretch his brother out on things, and then fuck his loose hole while Yuuji writhed and whined and searched for stimulation.
He never got much stimulation when his brother and him were alone, without his mother there to push it Sukuna was happy to just use his brother.
They had started wrestling and that's how they ended up on the bed, it always ended on the bed.
"Suku-nii should kiss me at least." He was pouty, he knew he wasn't going to get to cum today if Sukunas usual habits showed up.
"Suku-nii," his voice was mocking as he repeated his title. "Wants to see if you can finally take all of Mom's toy."
There was a blunt pressure on his hole, pushing in slowly, only aided by a small amount of spit to act as lube and his own control over his muscles as he made himself relax around the intrusion.
It was big, stealing his breath with every motion of it being fucked further and further into his guts.
He felt like something churning in the ocean, flipped and filled without any care for how he felt, pulled apart and fucked back together without a care given to his tender body.
It got him off more than he'd tell his brother, to be treated like an object to be played with like this.
His mother probably knew, that's why she'd treat him like that, only giving him enough to get him addicted to it while his brother only took from him, using him like a toy just to pull him apart with fascination.
The toy dragged over that spot inside him, lighting his body up with an icy hot fire that had him coming undone with a loud cry, cum shooting up over his stomach and bare legs, messing up his shirt and probably getting some on the mattress as well.
He felt his brothers gaze, opening his eyes to see him looking down at him in awe, base of the dildo flush with his rim. He was full in ways he hasn't been before, and it was absoutly addicting to feel.
That's when they heard the door opening, their mother back early to catch them in the devious act currently happening in her son's bedroom.
Sukuna didn't even move, just staring down at the toy and back at the door, his mother's footsteps approaching and opening the shut door without knocking.
A truly unsettling grin set over her face as she took in the sight of her misbehaving boys.
"Aww suku you couldn't wait for me?"
"Mm sorry mommy he just looked so pretty and he took it all!" His voice was so different when he talked to their mom, sweet and soft in ways he never got directed at him.
"I see that baby."
There was a second hand on the base between his legs, rocking it into him in ways that had him shaking through another release even with the minute movements.
"Oh Yuuji-kun is so cute all full! Look at his tummy suku-baby."
He looked down to see the bulge and it nearly had him cumming for a third painful time as he did.
"It's going to be a long night, hm?"
The question was open ended, he knew he'd be passed out well before it was over.