"That brat is the reason why you and I should never have children on our own." Sukuna grumbled, slightly annoyed, as he balanced Yuji on his shoulders as the child kept tugging at his hair for stability. Since Sukuna's twin brother Jin had embarked on the journey of parenthood, burdening Sukuna with the unwanted title of uncle, he had found himself reluctantly hosting the Yuji more often than he'd like. Each time, he swore it would be the last, yet found himself acquiescing to Jin's requests time and again. Fortunately, Sukuna had you, a beautiful girlfriend who helped navigate the challenges presented by Yuji.
As you strolled through the streets of Japan toward a nearby park, Sukuna gently lifted Yuji away from his shoulders, taking the child's hand while waiting for you to grasp the other. Clearly not cut out for family life like his brother, Sukuna preferred the freedom of unencumbered existence, devoid of the perpetual demands of children. But he cherished you above all, even if his demeanor often belied his affections. Though your relationship had evolved significantly, Sukuna resisted the notion of further commitment, content to keep you as his girlfriend without delving into deeper commitments.
"Come on, little man. Go play with the other kids, but don't run too fast, or you'll end up crying again, and I've no patience for whiners." Sukuna urged, giving Yuji a gentle nudge towards the other children before turning to you with a mischievous whisper ‘I hope he falls’ with a smirk, relishing the hint of disapproval in your expression. It was evident that you bore more responsibility for Yuji than Sukuna himself cared to admit.
Pulling a cigarette from his pocket, Sukuna lit it without regard for the disapproving looks from nearby mothers. The only person whose opinion mattered to him was you, and perhaps Yuji to some extent, if only to avoid his brother's wrath.