Gianna grinned widely at her sister from a across the dance floor as she squatted down to shake her ample and jiggling tits against the crotch of her latest dance partner. While she and Lucia shared a similarly generous endowment in the chest region, Lucia maintained her hourglass figure with daily workouts, while Gianna's was a more classically voluptuous physique. Despite that, Gianna's outgoing personality, easy laugh, and outrageous behaviour never failed to put her at center stage whenever the two sisters went out dancing. Lucia sighed as she watched her sister grind her ass into the guy behind her, while she pawed at the abs on one in front of her. She knew that the display was entirely for her benefit; for as long as she could remember, her sister had insisted on maintaining and promoting rivalry between them, and it was not in Lucia's nature to allow that rivalry to go unchallenged. Never-the-less, Lucia was more subtle in her competitiveness, whereas her sister most assuredly was not.
Lucia turned around to buy another drink, and found her sister sidling up to her almost immediately, as she abandoned her dance partners to harass Lucia at the bar.
"Having fun sis?" Lucia asked dryly.
"Oh. My. Gawd. Lucia, you should have felt the size of the lump in that guy's jeans!" Gianna said, gesturing to one of the guys on the dance floor. "Either he's smuggling beer cans into the bar or he's got the fattest dick I've ever seen!"
Lucia merely sighed in response. While both sisters were sexually liberated, and open about many of their conquests and experiences, she sometimes regretted admitting her love of big dicks to her sister. Ever since that day, Gianna had turned the relative size of their boyfriends units into a part of their rivalry, once embarrassing a boyfriend of Lucia's so badly that he dumped her the next day. Even worse was that while Lucia did indeed lust after large cock, it was far from the biggest factor in her attraction to a man. So while Lucia certainly had her fair share of well hung lovers over the years, her sister's single-minded competitiveness had resulted in her dating a veritable army of horse-hung men.
"Come on slut! You know you want to get out there and grind up on some hogs!" Gianna joked.
Since their teens, Gianna's nickname for Lucia had been slut, while Lucia, when she took the bait, usually responded with bitch. Tonight though, Lucia was tired from a long work week, and had hoped for a low key evening. Despite her wild streak, Gianna was good company, but this night in particular, she seemed to have the devil inside her and was out to cause trouble.
"You're going to dance! Come on!" Gianna implored again, this time grabbing Lucia by her hand, and dragging her away from her drink at the bar onto the dance floor. In seconds, Gianna was grinding against her sister, creating yet another scene that drew dirty looks from the other women in the bar, and instantly resulted in a crowd of single guys gathering around the two women like circling sharks. Lucia rolled her eyes and danced in time to the music while trying to ignore Gianna. Never-the-less, she soon found herself with a guy grinding a pointy hard on into her lower back, while another kept trying to cop a feel of her butt. Lucia slapped his hand away half heartedly, and then turned as her sister tugged on her arm.
"Lucia," Gianna said as she ran a hand up and down the stomach and chest of a tall and slender guy, "This is Ian."
"Nice to meet you..." Lucia started to say, before her sister suddenly continued.
Lucia watched appalled as Gianna's wandering hand drifted down his stomach and grasped a think lump in the front of his pants. "And this," she said lustily, "is Ian's cock."
"Oh my god." Lucia muttered, blushing bright red in embarrassment at her sister's behaviour. For his part, Ian seemed rather worse for wear with booze, and simply blissfully went along for the ride.
"Nice to meet you two too..." he slurred, his eyes drifting up and down Lucia's body, taking in her curves as he groped her sister's backside. Lucia could practically hear the gears in his head turning as he contemplated the three-way of every guy's dreams.
"I need a drink." Lucia said tiredly.
"Don't be jealous, slut!" Gianna laughed as her sister went back to the bar to get a fresh drink.
* * * * *
A few hours and few drinks later, Lucia and Gianna stumbled out of the bar, with Ian still in tow. Lucia was exhausted, with a strong buzz from the drinks, and there was little on her mind other than a nice warm bed, and annoyance with Gianna's increasingly wild and sexual behaviour of the course of the evening. It had eventually been some bouncers that had suggested they leave, after Ian had been caught licking Gianna's bare tits in a booth at the back of the bar. Gianna had merely laughed it off, but Lucia was mortified at being kicked out of their regular dance bar.
While Lucia worked to flag down a passing cab, Ian had Gianna pressed up against the front wall of the club as their hands roamed and their lips locked. When Lucia finally succeeded in getting a cab, she had to physically walk over and grab Gianna's hand to pry them apart and move them towards the idling vehicle. Gianna merely laughed mockingly at her annoyance.
Gianna and Ian were all over one another as they clambered into the back seat of the taxi. Lucia, sitting on the passenger side of the back seat, turned her head away, not wanting to give her sister the opportunity and satisfaction of showing off with her public display which was clearly designed to make Lucia jealous.
After turning her head away however, Lucia realized that the window beside her was reflecting Gianna's antics, and with the knowledge that her sister wouldn't realize she was watching, Lucia surreptitiously observed as Ian began to grope Gianna's heavy breasts as they made out. Lucia felt her cheeks flush with arousal as she saw Gianna's hand grasp at the generous bulge in Ian's jeans yet again, an glanced in the rear view mirror to see if the Cab driver was aware of what was happening. She smiled to herself as she saw him glancing up constantly; watching the show with attention as rapt as her own.
Turning her head back to the reflection in the window again, Lucia watched as Gianna squeezed and stroked the growing lump in Ian's pants. She closed her eyes, happy that Ian's soft moans of pleasure helped to disguise her own quickening breath as she felt a familiar warmth growing between her thighs. Though Lucia got off on this kind of voyeurism, and knew she could take matters into her own hands before she went to sleep at home, she began to feel a pang of jealousy just as her sister had intended. Lucia knew from talking to her sister that Gianna was in reality a selfish lover, far more interested in her own pleasure that that of her partner. Her single-minded focus throughout the evening on fondling Ian's manhood were solely designed to make Lucia green with envy, using the Gianna's knowledge of Lucias secret lust for big dicks against her.
Lucia kept her eyes closed as she heard Ian's zipper being lowered, hoping to arrive at her apartment soon so that she could rush upstairs to her bedroom and press her hand against her swollen clit, rubbing and fingering it until she came to glorious climax. Despite her efforts to ignore the sounds of Ian's package being unveiled, she couldn't resist turning to look at the sound of her sister's voice.
"Lucia... look at this!" Gianna said with genuine awe in her voice.
Lucia turned to face her sister, catching the driver look up into his mirror from the corner of her eye as she did. She immediately forgot all about the driver however; and had to suppress a gasp of delight as she saw her sister leaning low over Ian's lap, her left hand holding aloft one of the largest cocks Lucia had ever seen. Ian was truly huge like a porn star; not just in length, but in immense girth as well. Gianna's finger tips, gripping him at the base of his member, were over an inch away from touching her thumb. Even more amazingly, Ian's shaft maintained this thickness along the entire length, the perfectly straight cylinder of flesh topped with a broad, purple, uncircumcised head.
Lucia thought it was one of the most gorgeous dicks she had ever seen. Unable to speak, she merely sat mute, eyes and mouth wide open as she stared.
