Without waiting for a response, Bob took matters into his hands—literally—and slid his member smoothly into Derpy's tight entrance. A soft cry escaped her lips as she felt the initial penetration break through the barrier of uncertainty and fear surrounding them. It wasn't painful; rather, it was an explosion of sensations crashing down upon her like thunderbolts striking across a clear sky. Their combined scents filled the room, intertwining in an erotic dance of passion and desire.

Bob began thrusting steadily, each powerful motion driving deeper into her core. The rhythmic movement caused waves of ecstasy to ripple throughout her body, sending electric shockwaves coursing through every nerve ending. In turn, Derpy wrapped her legs around him tightly, anchoring themselves together as one entity lost in lustful bliss. Sweat trickles down her flushed face, mixing with tears of pure euphoria streaming down her cheeks.

The pace picked up rapidly, leaving neither of them breathless. Each forceful thrust brought them closer to the edge, pushing them further than either had ever dared imagine. With each passing moment, the sounds of their labored breathing grew louder, punctuated by moans and gasps of delight that echoed through the empty house. As the intensity reached unprecedented heights, Derpy's vision started to tunnel, stars exploding behind her eyelids while her marehood throbbed in sync with each powerful thrust.

In what seemed like an eternity of mind-numbing pleasure, Bob suddenly pulled out, releasing a torrent of thick, white fluid onto Derpy's head and open mouth. The warm liquid cascaded down her features, painting a messy yet beautiful picture of raw desire and unbridled passion. Before either could catch their breath, he positioned himself once again and drove his rigid member deep inside her wetness, this time adding another layer of intimacy to their already intense union. As he resumed thrusting, something else happened – instead of spurting more semen, a steady stream of golden urine gently poured forth from his member, filling Derpy's insatiable depths to capacity. His strong arms wrapped around her waist, holding her close as he continued to pump his hot seed into her fertile soil. Meanwhile, the relentless flow of warm piss swelled her stomach, causing her normally curvy figure to grow even rounder and fuller underneath his touch.

Derpy arched her back, meeting each powerful thrust with equal fervor. Every muscle in her lithe frame was stretched taught, vibrating with each powerful stroke. Her hooves dug into the soft mattress beneath them, leaving shallow indentions as she rode out wave after wave of orgasmic bliss. Never before had she felt so alive, so connected to another living creature. This…this was heaven itself, trapped within the confines of a simple bedroom. With a cry that reverberated through the room, Derpy's own climax crashed over her like a tidal wave, engulfing her entire being in an explosion of sensation unlike anything she had ever experienced before. Wave upon wave of orgasmic ecstasy rolled through her body, shaking her limbs loose and weakened by the sheer intensity of the experience. For long moments, they remained entangled, bodies intertwined, hearts racing against each other's rhythm.

Finally regaining enough composure to speak, Derpy managed a raspy whisper. "B-Bob…" she began, her voice trembling slightly with emotion. "T-Thank you," she stammered, unable to find words adequate enough to express how incredible those few short minutes had been. As reality slowly started creeping back in, she couldn't help but notice the stickiness covering every exposed surface of her body – a mix of sweat, love juices, and, most prominently, warm piss. Despite the mess they were now in, there was no trace of shame or embarrassment in her sparkling eyes; rather, there lingered only contentment and a hint of yearning for more. "W-Well," she hesitantly ventured, mustering up courage she didn't know she still possessed. "Um, I uhh, wanted to ask… do you think we could maybe… ummm… be together?" Her question hung in the air, suspended between them like a delicate balloon waiting to burst apart at any moment. Inwardly, she prayed that he would say yes, that perhaps, just maybe, there might finally be hope for her broken little heart.

A joyous squeak escaped Derpy's lips as Bob wrapped his strong arms around her, pulling her close. The contact sent waves of pure euphoria coursing through her system, making her feel lightheaded and giddy with happiness. It was real! He said yes! With renewed vigor, she returned the hug, savoring this precious moment where everything seemed right in the world once again. "R-Really?!" she repeated, unable to believe her luck. "O-Oh, thank you, thank you, thank you!" Unable to contain her excitement anymore, tears welled up in her golden eyes, threatening to spill forth at any second. But before they could fall, she pulled away just far enough to gaze up at him adoringly. "So, uhm, what about you? Do you… do you want to be my special somepon mare?" She asked nervously, biting her lip anxiously awaiting his answer.

Derpy's entire world exploded into a brilliant rainbow explosion of colors and emotions, drowning her senses in a sea of bliss. A radiant smile spread across her face, illuminating the room with its brilliance. "Y-You mean it?!" she choked out, barely able to comprehend the miracle unfolding before her eyes. This day had turned out to be the best one yet, and nothing – absolutely nothing – could ever ruin this perfect moment. With renewed confidence, she boldly leaned forward, her soft lips mere inches away from his own. Taking a deep breath, she closed the distance between them, their bodies melting together in harmony. Their first kiss was tentative at first, hesitant touches of two souls cautiously dipping their hooves into uncharted waters. But soon, fueled by mutual desire and growing trust, it grew deeper, hotter, more passionate than either of them had ever imagined possible.

As their tongues tangled and danced, their hearts beat wildly in syncop rhythm, echoing the frantic thumping of their eager hearts. Time itself ceased to exist; there were no worries, no responsibilities, no past failures haunting them. There was only now, this fleeting moment shared solely between them. They didn't even notice how lost they were in each other's embrace, oblivious to anything else around them. Finally, panting heavily, they reluctantly broke apart, their faces flushed red with lust and satisfaction. Gazing down shyly, Derpy couldn't bring herself to meet Bob's piercing blue eyes, afraid he might change his mind after seeing the mess she had made of herself. But when she finally mustered up the courage to look up at him, she found him staring back at her with undeniable love and affection written plainly in those mesmerizing pools of sapphire.

"B-Bob… I…" stammered Derpy, unable to find words adequate enough to express just how much his words meant to her. The warmth spreading through her body intensified as his member pressed against her sensitive folds, teasing her aching core. Unable to resist any longer, she arched her hips involuntarily, inviting him closer, begging for more. And oh, how she got what she asked for! With practiced ease, Bob positioned himself perfectly, aligning his rigid length with her dripping wet entrance. Inch by excruciatingly slow inch, he slowly began to penetrate her tight virginity, eliciting moans of pure ecstasy that reverberated throughout the empty library. As he breached her barrier, both of them gasped in surprise and pleasure, their bodies instantly melding into one seamless entity.

Derpy wrapped her slender limbs around Bob like vines entwining themselves around a tree trunk, anchoring them together as they embarked on this passionate journey filled with unbridled desire and raw animalistic lust. His powerful thrusts drove her crazy, every hard impact sending waves of bliss coursing through her entire being. He growls, groan, grunts, and moans fill the otherwise silent library, punctuated periodically by the slaps of flesh against skin and the squeals of delight escaping from Derpy's lips. Her once pristine uniform lay in tatters around them, discarded carelessly as their primal instincts took control. Sweat trickles down their furred bodies, creating sticky trails that further bonded them together. Their breaths become ragged gasps for air interspersed with heavy pants and labored whimpers as orgasm approached ever so tantalizingly close. And then, suddenly, like two trains colliding headlong into each other, they exploded together in a climactic crescendo of earthshattering intensity that shook the very foundation of the old building they were in.

As their bodies finally subsided from their mind-numbing peak, reality crept back into focus bit by painfully aware bit. A throbbing headache started to form behind Derpy's eyeballs while her exhausted muscles protested loudly at having been used so mercilessly. Breathing heavily, she tried to gather up whatever shreds remained of her dignity before attempting to answer her concerned supervisor's query about her current location. "Uh, um," stuttered Derpy, trying futilely to come up with something plausible. But before she could muster anything coherent, Bob spoke up smoothly, his voice still thickened by arousal but nonetheless confident and reassuring. "She had a family emergency earlier today, sir/ma'am," he lied effortlessly. "We managed to take care of everything already, though we decided to stay here a little longer to catch our breath." There was silence on the other end of the line before the irritated mare finally relented. "F fine, just don't let it happen again, mailmare!" she snapped before disconnecting abruptly. Flushing crimson from embarrassment, shame, and an odd mix of relief and disappointment, Derpy turned towards Bob sheepishly, her big golden eyes pleading silently for understanding and accept