Alice Plays Lacy's Bongos

Alice rounds on Lacy, who is still slowly ambling across the grass in short, restrained strides while trying to pull her panties back up, which she eventually succeeds at after several false starts, where they either hang lop-sidedly halfway up her thighs or rest unevenly on her hips. "Such a show-off," Alice calls out. "It's hardly fair, laughing at a little boy and his little dick. Seems only right to return the favour." She says, loudly while briefly glancing over at you. You wilt slightly under her gaze, brief though it is. In three quick steps she's close enough to grab Lacy and does just that, flipping her over and pinning her to the ground, her skirt now hopelessly trapped beneath her as Alice stands over her. "Alice, lemme go!" She squeaks, but Alice simply smiles, hauls her back to her feet and rips the skirt right off of her. Lacy screams and goes to cover the still-sheer front of her panties with her hands tightening her grip on her younger sister. "It's such a shame you turned out like this," she says, sadly. "I remember a time when you still had a little humility, like, say, the family barbeque at Aunt Jess' house?"
Lacy's eyes widen in fear at this, she pushes against her sister's shoulder with all her might, but gets nowhere. "No..." she says, shakily. "You're not going to..."
"Do you remember throwing that ridiculous tantrum over...what was it, me using that makeup kit mum got you for Christmas? You kept on and on about it, and I was just trying my best to ignore it because, hey, bratty little sister making a scene at a family get-together, what else is new?" She purses her lips sternly, looking down at Lacy's panty-clad arse. "But then...you shoved me, right into the patio furniture, and my tights tore wide open, and suddenly I'm lying there flashing my thong to the whole extended family..." she blushes slightly at the memory, lost in it for a moment. "And of course it was just my luck that I was wearing an old pair, so if you remember what happened next, the...?" She prompts Lacy by prodding her sharply between her ribs. Lacy gulps, looking at her over her shoulder. "Y-y-you...your thong snapped, and..."
"My legs were wide open," she hissed. "All of our cousins kept making meowing noises and calling it—me The Pink Panther whenever they saw me for years afterwards! I still can't look Lesbo Laura in the eye at family functions! Obviously I was angry, so what did I do once I'd gotten back up?"
Lacy shakes her head nervously, not daring to answer. "I grabbed hold of you," Alice continues. "Put you over my knee..." she prods Lacy again, who's rapidly turning crimson."Y-you...you pulled my panties down and..."
"And then we played the bongos, right there in front of everyone!" Alice grins.
Lacy's eyes went wide, in them equal parts fear and recognition. "The...no, you promised you'd never do that again! You promised, Alice!"
Alice smiles darkly and swiftly kicks Lacy's feet out from under her, she shrieks but Alice catches her and lays her unceremoniously across her lap, before leaning down to grab Lacy's little white panties by their soaked gusset. "Ah, c'mon, sis! We both know you liked it. You've always been a showoff, deep down."
"No!" Lacy looks down, her eyes filled with panic. "No I didn't! Alice, you know I hated it! Everyone was laughing at me, cousin Marty kept staring! Now let go!"
Alice's expression twists into a mocking sneer. "Aw, why? Afraid I'm gonna take away your widdle undie wundies?" She grasps the back of the panties.
"D-don't! Please!" Lacy pleads, wriggling uncomfortably in Alice's grip.
"Don't what?"
"D-don't pull my panties down!"
"Your what?"
"My...my panties?"
"Don't do what to your what?" She stretches out the back of Lacy's little white panties and releases them to let them snap back into place. Lacy gulps, then, trembling all over, tries one last time,"Pull down my undies?"
Alice laughs. "If you say so!"
"Wait, that's not what I—" Lacy cuts herself off with a squeal as Alice slides the undies in question down Lacy's slim legs, all the way down to her ankles, where they come to a rest hooked around her shoes. Your head swims, and your cock is fit to burst; the cutesy affect added to the words clearly only heightens Lacy's embarrassment and your arousal—they're not panties or knickers, they're undies, which means Lacy is the silly, immature little sister wearing them, wiggling her tight, juicy rear-end from side to side as she tries to break free, helpless to stop her sister from tearing away what's left of her dignity. "But—but—but..." she stammers, desperately searching for a way out.
"The only butt you need to be worried about is the one everyone saw that day in Jess' backyard, you know between you and me I heard her talking with Mum after it was all over; she asked her what exactly you were eating at home, she was worried about how fat your arse was getting; you were kicking and screaming and..well, it was like you were carrying a whole plateful of jelly back there!" She snickers loudly at her own joke, tapping Lacy's left cheek to make it wobble demonstratively.

"Alice!" She cries, as Alice pauses, poised with one hand pinning her in her lap and the other raised and ready to go. "What?" She replies, clearly impatient.
"I'm...I'm sorry...?"
"No you're not, the only thing you're sorry about is getting shown-up in front of Mr. Freeball over there." You flush at the mention of your situation, still trying to hide your erection with the flats of both palmsAlice starts...drumming, whapping her younger sister on her plump white buns over and over again. It's not spanking, Aluce's touch is too light for that; no, this is calculated to leave no marks and little to nothing in the way of pain, that much is obvious. The punishment isn't a firm series of slaps on the hind quarters, it's the dizzying exposure of having her cute little ass drummed on like...well, like a pair of bongos, you suppose. Lacy screams and whines, but Alice just keeps on going. Palm meets flesh and makes it jiggle, her rosy round cheeks quivering up a storm—creamy peaches fully exposed and reddening slightly in the blustery winter air. "Noooo! I'm—eek—not—owww—not a little girl anymore!" Her breath is fogging the air as she breathlessly spits out the words between squeaks of pain, the snatches you get of her face from this angle tell you all you need to know about how she's feeling—it's the colour of a traffic light on 'STOP'. To emphasise her displeasure, Lacy kicks her feet idly up in the air behind her, undies still hanging by her shoes, fringed with frills on the waistband and still dripping. Alice's grin widens "Oh no, you're definitely not!" To prove the point, she grabs a handful of soft young cheek on either side and pulled them apart, exposing the cute teenage pussy between them, its full, puffy lips sandwiched between the taut, slappable drums of her cheeks. Lacy squeals like the little girl she claims not to be and continues to fidget wildly in Alice's grip.

Your eyes are half-closed, lids fluttering as you struggle between two streams of thought, one of them tells you, I shouldn't be watching this, she's naked and embarrassed and the other, I can't stop watching this, she's naked and embarrassed! Quite accidentally (you're pretty sure) your fingertips slide a fraction of an inch downwards over the end of that 'willy' of yours, you flinch at the jolt of sensation as your foreskin rubs against its head. One step away from whacking off, you chide yourself. Can't do that, not here. It's true after all, you can't masturbate here in front of Lacy and her older sister...can you?

[Author's Note: I always enjoy and appreciate feedback in terms of what's working and what isn't, so please feel free to like and/or leave comments!]