Step 3: Buttfucking the Zlutta

Set withdrew from Bexi's passionate liplocked embrace, and sat up. She promptly got on all fours on the bed, her arms down on the duvet and her head resting on her arms. Her back was arched up to her round miniskirted butt, which, blossoming out from her slim waist, was held up high in the air, eagerly presenting itself to Set for inspection.
Gladly he kneeled behind her, placing a hand on each of her soft, large asscheeks, drinking in the sight of her dripping little shaved pussy, already closed despite its recent accomodation of his monster cock.
Bexi shivered a little in slightly nervous excitement, looking behind her. "Part my big bumcheeks." She commanded.
Set used his hands to do just what she said, and found himself staring in disbelief. Her exposed ring was not the tight pink hole he had been expecting. Instead he was faced with a small but already sexily gaping hole, a dark circular opening the size of one of his fingers. The sort of obscene look one might expect after a long, hard fucking by a regular sized cock. The lewd hole, bulbous and thick rimmed around the edges, winked at him as Bexi twitched her ass muscles.

"Mmm... do you like my fat slutty butthole?" Bexi purred at him, looking into his eyes lustfully, smiling as Set nodded dumbly. "People are always surprised when they first see it, they think it's gonna be a little innocent thing, but they just haven't taken into account that no-one, absolutely no-one gets sodomised as much as I do! I get my bottom stretched every hour of the day. I even sleep with a huge dildo buried in it. Over time I've needed bigger and bigger penetrations and it's looked more and more abused. I don't mind though, in fact I like it. I look at it in the mirror all the time. I think it looks cute."
Set gawped at how such a wantonly lascivious asshole could ever be described as 'cute'. Nevertheless, there was a strong urge indeed to sink his fleshy rod deep into this teen anal addict's promiscuous rear end.
"What's the biggest you've taken?" Set enquired.
"Don't worry," Bexi reassured him, "you're still the biggest... by a little bit."
"Hmm." Set hmm-ed. He mentally suggested to himself to test her limits a bit further still when the opportunity presented itself, and he moved to position his huge cockhead at Bexi's willing backdoor.

Bexi shuddered in her sexual anticipation, her engorged butthole opening and closing a little as it tried to clasp onto Set's meat, attempting to suck it inside.
Set prodded into the schoolgirl's bubblicious bottom, watching with near-scholary interest in how her cinammon ring immediately dilated and expanded even further to the pressure in its expert efforts to take in another most welcome intruder.
Bexi let out a long, blissed out groan as she felt the familiar but never remotely disappointing feeling of her well-used bumhole expand to one of its largest sizes yet, Set's thick helmet popping through into her clutching ass.

Set suddenly found himself not being the one to **** his monster tool deeper into a tight ass. Instead, Bexi, with a deeply satisfied cry, pushed her greedy miniskirted apple bottom back into Set's groin, causing his fat cockmeat to have nowhere to go but slide deep into her hot buttery anal depths.
Despite the amazing sight of the act, Set couldn't help but tossing his head back and gritting his teeth as he experienced the **** arousal of his veined, throbbing shaft gripped by a deliriously warm eighteen year old ass.

As he controlled himself, he looked down to see a panting, softly moaning Bexi with eleven inches of quality dickmeat buried to the hilt inside her bottom. Her big, wide asscheeks were wrapped around his cock and her full, sexy boobies were swinging beneath her.
"I ain't never seen someone take it so fast on a first go." Set remarked, very impressed but breathing hard, as her burning hot teenage rectum, despite its original state, gripped him like a vice.
"I take it hard and rough on a first go too." Bexi flicked her eyelashes at him. "I think you know what I want you to do now."
Set grinned. "Remind me?"
Bexi's face was flushed as she replied. "Fuck my warm teen bottom and teach me what it means to be your silly fuckdoll. Punish my horny ring for wanting nothing less than to be sodomised every second of every day non-fucking-stop like the pretty little buttslut I am."

Set flexed his hands.