Obediently, Serena began unfastening the intricate laces of her tight fitting bodice, slowly peeling away layer after layer until her pale flesh was exposed. With trembling anticipation, she climbed onto the plastic-covered mattress, positioning herself prone beneath the cool waterspray of the ceiling fixture. Meanwhile, Rina and Ella shed their bottom wear, revealing their voluptuous rear ends and hairy pussies respectively. They scurried over to the bar counter, filling three large mugs to the brim with a rich, ruby red wine imported from distant lands. Returning swiftly, they handed one cup to each of their fellow students while maintaining eye contact with Luna, waiting for further instructions.

Serena obediently took a long, sensual gulp of the intoxicating liquid before resuming her slow, teasing caresses across her naked body. As instructed, she focused particularly on her breasts, nipples standing erect with arousal, and between her legs, rubbing circles around her sensitive folds. The cool water cascading down upon her skin heightened her already heightened senses, sending shivers of delight rippling through her entire being. The sight of Serena's supple figure writhing seductively underneath the steady stream of icy cold water proved too much for Rina and Ella. Both women watched intently, their breaths quickening in sync with the rhythm of Serena's movements. Unable to resist any longer, Rina reached out delicately, trailing her fingertips lightly along the curve of Ella's muscular thigh, eliciting a low growl of approval from deep within her chest.

With eager anticipation etched across her features, Serena arched her hips slightly, thrusting her pert ass skyward towards her powerful mistresses. "Ohhhh, Mistresses," she moaned lustfully, "Please… don't deny me this sweet punishment!" Taking advantage of their distraction, she continued to work feverishly at her aching cunt, coaxing forth whimpering sounds of ecstasy from deep within her throat. As directed, Rina and Ella locked gazes, their lips curled into predatory smiles. Slowly but surely, their hands wandered downwards, grabbing firm hold of their swollen sex organs. Their heavy breaths intertwined, creating a steamy haze around them as they began to sway back and forth ever so slightly, their full breasts jiggling enticing rhythms against each other. In response, Serena upped the ante, spreading wide her legs apart, exposing her most vulnerable spot. Her voice became more desperate, pleading with them to relieve themselves upon her. "I'm ready… do it… fill me up… make me yours."

Rina and Ella exchanged knowing glances, their eyes filled with determination and desire. They nodded silently, focusing intensely on maintaining control over their urges. With trembling fingers, they returned to their respective glasses, taking small sips of the potent vintage, determined not to succumb to temptation just yet. However, Serena's provocative display only served to fuel the fire burning inside them. Each tantalizing movement, each erotic sound that escaped her lips, seemed designed specifically to undo whatever fragile restraint they had managed to clutch onto thus far. Sweat trickled down their brows, mingling with the remnants of sweat and saliva left behind from their earlier bout of passionate kissing. It would indeed prove to be an epic battle of willpower and endurance, one which neither woman intended to lose.

going girls! Only one can emerge victorious today! Your prize for winning depends entirely on what fate I decide for poor Serena. But know this, whoever wins, you shall enjoy your reward greatly!

The two slaves gulped down another mouthful of wine, their bodies shivering with anticipation. Despite their best efforts, droplets of perspiration started forming along their hairline, tracing slow, sensual paths downwards until they finally reached their chests, leaving behind tell-tale stains on their once pristine robes. Serena continued her seductive dance, her movements becoming increasingly more explicit as time wore on. A soft groan escaped Ella's lips, her hand unconsciously drifting closer towards her wet crotch. In response, Rina tightened her grasp on her own thighs, digging nails into delicate flesh, refusing to give in to the siren song emanating from beneath the sheets. "Come on, my little sluts," Serena taunted playfully, "Don't disappoint me now…"

With renewed resolve, both women steeled themselves against the relentless assault on their weakening defenses. Their breathing grew heavier, syncopated by the rhythm of Serena's sinuous movements. Droplets of sweat trickled down between their breasts, merging together to form tiny pools of moisture that slowly began to darken the fabric of their garments. Ella closed her eyes briefly, visualizing a serene forest glade where she could let loose and empty herself freely. The image was fleeting though, replaced almost instantaneously by the sight and scent of Serena's aroused body mere inches away from her nose. Her hands shook slightly, fisting tighter around her precious bottle. She refused to fail her mistress. As for Rina… Well, Rina wasn't sure how much longer she could hold out. Every muscle in her body ached with wanton need, yearning for relief. Yet something deeper within her, some primordial survival instinct, kept her locked in place like a statue carved from stone.

Instruction:

Ella opened her eyes wide, shocked by the sudden touch but quickly regaining composure. Her gaze shifted warily toward Lucky Luke, trying to read any hint of satisfaction or disdain in those cold, calculating eyes. Fear fueled her determination even further, adrenaline coursing through her veins like electricity. No matter what happened next, she would not shame her master. Rina bit her lip hard enough to draw blood, teeth clattering loudly in the otherwise silent room. Tears welled up in her eyes, threatening to spill over at any moment. Her fingers slipped ever so slightly, causing an involuntary splash of warm liquid to land on the floor below her feet. It was only a drop, barely noticeable amidst the constant dripping sounds of the crowd surrounding them, yet it felt like the world had come crashing down around her ears.

In a heartbeat, Rina's facade crumbled like a house of cards, collapsing under the weight of months upon months of pent-up desire and frustration. With a wail of pure lust, she lunges forward, arms wrapping around Serena's waist, tongue thrusting forcefully past her quivering lips. Hot, salty tears mingled with the torrent of urine pouring forth from her eager channel, coating both women in a sticky mess of heat and desperation. Ella froze, unable to comprehend the swiftness of events unfolding before her very eyes. One moment, there were still two contestants standing tall; the next, one lay prostrate at the foot of victory while the loser surrendered completely to base animalistic impulses. Slowly, tentatively, she lowered her eyes, taking inventory of her own situation. Her knuckles whitened painfully around the bottle, sweaty palms slippery with fear and excitement alike. The sweet smell of urine filled her nostrils, making her head spin with desire. For a brief moment, she considered joining them, letting go of all restraints and giving in to the forbidden pleasure calling out to her. But then, just as suddenly as it had surfaced, the temptation subsided, replaced once again

Ella shook herself free of the dark thoughts plaguing her mind, refocusing on the task at hand - pleasing her Master. She took a deep breath, steadying her trembling hands, and raised the wine jug high above her head. In one fluid motion, she brought it downward, unleashing a powerful stream into the waiting mouths below. A small part of her relished the sound of gasps and moans echoing throughout the tavern, gratified by her ability to control these men with nothing more than her body. As the last drops trickled downward, signaling that she had emptied the jug, Ella stood proudly, chest puffed out with pride despite her pounding heart and racing pulse. Eyes locked onto Lucky Luke's ice-cold gaze, awaiting his verdict. Would he praise her? Punish her for hesitating earlier? Or did something else entirely lie hidden behind those cold depths?