Babysat - Part Three (Commission)

Originally commissioned for Contentfromtheshadowrealm.

"Aww, you look so cute with that pretty pink dummy of yours!" came the condescending voice Chelsea knew only too well. "What a good little girl you're being, hmm? Now then, you haven't made a silly little accident in your pull-ups, have you? If you have, Mommy might have to find something more suited to a stupid baby girl like you! You know, I bet you'd look super sweet wearing Pampers just like a real baby. Just like the stupid baby you are..."

It was afternoon, ten whole hellish days since Sharon's arrival. Chelsea, sprawled on the living room carpet and conscious every second of the pull-up beneath her skirt and the pacifier between her lips, hid her grin and hastily slid closed the browser on her iPad. Out for delivery, the latest email had said – exactly what she needed. It was time to make her move at last, the move that would show once and for all whether those hypnotic files actually worked as advertised. After five whole nights, that shit better have done the job! she growled internally. All she needed now was to speak the master trigger: the magical word that, if those online reviews were to be believed, would turn this whole crazy power dynamic on its stupid head...

Out came the loathsome pacifier, her liberated lips curling into a vindictive sneer, forming the three little syllables that spelled her freedom. "Canteloupe."

She glanced up expectantly from the carpet, only to find the expression on Sharon's face... indescribable. Twisting from supercilious amusement to puzzled, slack-jawed, witless wonderment. "Uh-huh," Sharon slowly breathed, her entire body sagging into limp obedience. "Okay... Mommy..."

Holy shit. It was actually working!

Chelsea scrabbled up from the floor, an impish grin on her face as she held out the pacifier so recently between her own lips. "Ooh, look, Sharon! I found your dummy, you stupid little- little dummy! Now open up for Mommy, okay?" Lips parted – the young woman's mouth drooped open – and within seconds, Sharon was mutely suckling on the very pacifier she'd only yesterday been maliciously forcing between Chelsea's protesting lips.

And then, as if right on cue, the doorbell rang, announcing the arrival of three rather large but unassuming parcels.

By the time Chelsea's very busy next hour had concluded, a sea change had been wrought in the household. Gone was the self-assured, condescending bully of the past week. In her place sat an empty-eyed, obedient, over-sized baby girl, stripped of her adult trappings and attired now in her strawberry-covered pink onesie, frilly socks, and most importantly, the thick bulk of her first-ever diaper... since the age of three, at least.

As Chelsea led her erstwhile babysitter down the hall toward the bedroom that was now to be hers, she chortled in smug satisfaction. That dresser was now completely redone: filled to the brim with Sharon's massive new diapers, rather than mere pull-ups. Her new baby outfits hung ready and waiting. And there were even two new pairs of plastic pants, fresh and crinkling, that offered the wearer protection against – well, against that most inevitable of babyish accidents...

"Oh, Sharon, you're such a sweet little thing!" Chelsea teased now, looking superciliously down into the dull eyes of her hapless former babysitter as she pushed her down onto the carpet. "I bet you're getting pretty thirsty, though, huh? Good thing Mommy Chelsea just made up this lovely big ba-ba for you! Now, open up, honey. Time for num-nums..." And sure enough, the slack-jawed mouth drooped open once more, and within seconds Sharon – the very babysitter who'd only two hours before been forcing Chelsea to drink from a toddler's sippy cup – was obediently gulping and sucking down the baby bottle full of juice being forced down her throat.

Gotta love how obedient this hypnosis makes her, Chelsea reflected in malignant satisfaction as, not five minutes later, the final drops of juice drained into Sharon's still suckling mouth. Though I really wonder if she's actually willing to, you know... Only one way to find out, I guess! Hope that diaper's on nice and tight...

"Good baby!" she beamed now, pulling Sharon upright and giggling as a most unladylike burp escaped her. "Ooh, somebody was thirsty, huh! Now, why don't you show Mommy Chelsea what such a good little baby has to do in her pretty diapie? Don't forget, baby: good little girls obey Mommy, and bad girls get spankings. Okay, then... pineapple!"

As Sharon's eyes wavered, then glazed into triggered obedience, and as the hot hiss of urine flooding into cottony padding sounded in the room, Chelsea broke out laughing. "Aww, you're actually doing it! You're such a good little baby, peeing your diaper for Mommy right on command! Bet they never taught you that in your stupid college, now, did they?" She giggled at the puzzlement suddenly clouding Sharon's face: the look of a toddler utterly mystified by the warm, swelling sensations of their own soggy diaper.

"Oh, but that's not all a good little diaper baby does, is it, honey?" Chelsea tittered, beside herself with glee at how the tables had turned. "Now then, baby. Listen very hard to Mommy, okay?" She bent closer and thrust the nipple of the pacifier back between Sharon's drooling lips. "Papaya, baby. Pa-pa-ya."

Sure enough, within seconds Sharon had dropped forward onto all fours, her brow furrowed in concentration. A muted gurgle and grunt escaped from behind her pacifier as her entire body arched and stiffened, straining into the unmistakable pose of a toddler hard at work filling her pants. "Uhh... Uuuhhh..."

Holy fucking shit. She's actually, well, shitting herself! Just like that-

And so it was that, scarcely two minutes later, the red-faced Sharon gazed mutely up at her former charge, a fresh load of her own poop held securely within the soggy padding of her diaper. "Oh, my – such a stinky little baby!" Chelsea giggled, firmly pushing her friend backward onto the floor – right onto her dirty bottom. "I bet you love how that dirty diaper feels, huh? Now then, who's the real baby here, huh? The girl who outsmarted you – who got all this stuff on the sly – who took control without you even knowing? Or you: a stupid, dumb-ass little bully, sitting there in your pissy and shitty diaper like the dumb baby you wanted to turn me into?"

Chelsea was laughing hysterically now, shaking her head with mirth as she mentally compared what she had just accomplished – this utter, complete masterpiece of revenge – with the silly little pull-ups and petty teasing Sharon had attempted on her. Hell, yeah. She was firmly in control now. All she needed to do was keep treating Sharon like this... keep up the hypnotic training every night... maybe take some photos for blackmail just in case... Oh, my god, yes...

As the regressed Sharon, completely unable to comprehend what was so funny, wonderingly joined in the laughter, Chelsea smirked and patted her former babysitter on the head. "I know, you're such a funny, pathetic little mess now, aren't you? Now that we've set things straight, I think you and I are going to have a lot of fun before this is over. After all, we've still got six more weeks before my parents get home!"

"Huh – I wonder if you'll even remember what it's like to be a big girl by the time I'm done with you..."