[NBpF4A] Putting your girlfailure big sister back where she belongs--in diapers.

NSFWRoleplay request

Growing up, you were always the mature, responsible sibling.

It didn't matter that, technically, I was older by a couple years. You were the outgoing, independent one, while I was shy and wilting. You thrived academically, while I struggled and got held back or shunted to "remedial" classes. And, most obviously, there was the fact that I was always, well...

Accidentprone. In diapers straight into my school years, barely getting by in "protective underwear" well after that, and a chronic bedwetter even later. Mom was still buying me GoodNites when you moved out for your first year at college, while I stayed back at home, ours parents' embarrassing, little failure to launch.

Everyone has to grow up eventually, though, right?

Still, you're surprised when our mother calls you to ask if I can move in with you next year for *my* first year at university. Probably she'd talked up how I was doing well in community college courses and getting out more during your last couple trips home, but you didn't really take it seriously. She insists, though, that I've been doing so much better lately, really gaining some confidence. Actually going on dates!

When you eventually agree, I even show up without my special bedtime underwear.

You decide you don't care for that at *all.* Maybe that's out of well-intentioned concern: You're sure I'm bound to revert to form soon enough, and that all the false hope and expectations will just make it worse in the end when I inevitably, humiliatingly fail. Or maybe it's simpler than that. You liked being the smart, dependable, *mature* one compared to your pathetic, baby sister.

Whatever the case, you're going to make sure to fix things, and to make sure I don't forget that I'm your *little* sister ever, ever again.

((OOC: Shorter version: Your late-blooming, leaky older sister is finally blooming! You decide to nip that in the bud. That could mean overtly pushing her to incontinence and helplessness, or more gently coaxing her to slip back into old, dependent routines. Either way, looking to focus more on kink and character dynamics than sex.

Other fun kinks to incorporate could include: Chastity/orgasm denial, cuckqueaning, dumbification, uglification/dorkification, public humiliation/exposure, spanking, gaslighting/mindfucking, autism fetishization / sexualized stimming, and bad ends.

Hard limits include serious physical harm, nonconsensual sex, pregnancy, scat/filth beyond messy diapers, raceplay, and the obvious illegal sex acts/subjects.))

Posted Sep 17, 2026, 3:32 AM UTC

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