"Yup. I've had it with 'higher education.' Besides, all I need to know, I learned in primary school." She began to casually toy with the buttons on my blouse(I suppose this is as good a time as any to describe my school uniform: it consisted of a white short-sleeved blouse, black necktie, pleated black skirt, white knee-high stockings, and black patent leather shoes).
"Mum is going to be well cross."
"She'll get over it." Rocky unbuttoned my blouse and freed my breasts from their confinement in my bra. She then took the nipple of the boob nearest her into her mouth, sucking and biting it simultaneously.
"W-what are we watching?" I purred, desperately trying to maintain my composure. As usual, I was playing the role of the naive ingenue while my sister played the part of the seductress (this had been true once, but now it was merely role-play).
"A Japanese cartoon about sailor suited schoolgirls fighting aliens with their transforming animal robots," she muttered before quickly returning her mouth to my tits. At the same time, her hand went down the top of my skirt and into my moist knickers. I moaned softly, my head leaning over the back of the couch. As Rocky's questing fingers brought me closer to climax, a deep rumbling in my tummy reminded me of the massive payload my bowels had to deliver.
"T-their uniform s kinda look like the ones we wear at Westchester...Right!" I exclaimed in a tremulous voice. "This show is shit. I'm changin' it." I reached for the remote on the edge of the coffee table, "accidentally" knocking it to the floor. I bent over and scooped it up, but I didn't move. Rocky caught on at once and lifted my skirt up over my huge ass, exposing my granny pantys to her hungry gaze. I unclenched my sphincter and squeezed as hard as I could. I heard Rocky's breath catch as a monstrous poo turd erupted from my bumhole. It pushed my knickers at least eight inches from my bum! "Bloody hell, I dropped a right big panty sausage in my knickers," I sighed after my movement came to an end. A geyser of cum mingled piss gushed unbidden from my throbbing pussy, drenching the front of my skirt and Rocky's hot little hand(which was still in my pantys at that point).
"I can see that, you naughty, naughty thing," Rocky sibilated. "A big girl like you shitting yourself...you ought to be ashamed." She squeezed the massive bulge in my pantys. "You have to be punished." She pulled my knickers to one side one side, exposing my right bum cheek whilst leaving my poo intact. Her palm came down on my fleshy ass cheek with full force; she didn't hold back(I did not want her to: I rather like it rough). "You wicked, wicked girl!" she growled, each new blow harder than the last.
"Yesssss," I hissed through gritted teeth. "Spank my ass! Fucking do it harder! Yeah...I'm sooo bad! Fuck! Oh shit!Punish me. PUNISH ME! Ohhhh..."
"Jesus, Liz, keep it down!" Rocky clamped her hand over my mouth. "The neighbours are gonna think we're murdering a fucking cat or something over here."
I was beyond words at that point. My orgasm hit me like a ton of bricks and I fell on the floor, thrashing about like mad before lapsing into blissful numbness. I was aroused from my post-orgasmic stupor by a noisome hiss that sounded rather like the air being let out of a tyre. I knew at once that Rocky was loading up her knickers with poo. She bit her bottom lip and bore down with all her might, her hands gripping the couch so tightly that her knuckles turned white. There was another gaseous release followed by a wet squirting sound and a softer hiss that announced her urination. The entire affair made me randy once again, so I crawled over to her and lapped her swollen cunt lips through the sheer material of her knickers.
"Oh god, Lizzie, you're driving me mad! Shit...oh shit, I'm going to fucking explode!" Her entire body rose off the couch and she wailed like a bloody banshee.
"Shush, Rocky," I chided playfully and slapped my hand over her mouth. "Whatever will the neighbours think?"
