Twilight Sparkle landed back in her room and threw the notes onto her desk, before rushing into her covers. The alicorn mare felt the combined forces of intense cold and the warmth of her embarrassment and shame wash over her. The images and sensations had been too intense for her to handle. Just why did she agree to this horrible idea?! She couldn't stop thinking about her former lover's body. It was beautiful, breathtaking, and incredibly enticing.

"It was all for... Spike... All for Spike." Twilight muttered to herself, trying to calm her pounding heart. "I just need a bit of fresh air and some food and everything will be alright." She repeated that mantra over and over, unable to get up at all. Her mind continued to replay the scene again and again, the images flooding her senses. The curve of her back, the softness of her breasts, and the way her ass swayed when she turned.

Twilight's arms had a mind of their own, reaching over her plump nipples under her shirt. She pinched them hard, the pleasure shooting through her, causing a gasp to escape her lips. "No... I can't have these thoughts again..." she pleaded with herself. "This is not the same as before."

Her horn lit up and drop book after book over her face. She could only hope these tomes would be solace enough. However, each page was filled with lewd choices in stark contrast to what she wanted. As if her spells wanted to help her in the worst ways possible. The alicorn tried her best to keep the images from invading her mind. She attempted to block out the memory of Rarity's supple flesh pounding against her.

As she rolled back and forth on her bed, the familiar surroundings of her room felt suffocating. The walls were adorned with various pictures and artifacts that had served as constant reminders of her accomplishments in life, but none of them compared to the lustful thirst with Rarity. Her eyes were drawn to the photos depicting her and Spike, his bright smile and cheerful demeanor always lifting her spirits. His crush for Rarity felt so genuine and real, so cruel for her to keep the mare all to herself. "This is why I'm doing this..." she whispered, tears forming in her eyes. "To help him."

She tried to push those feelings away. With each passing second, her restlessness grew. Soon enough it was an almost unbearable sensation that tugged at her pussy. It was a deep ache that needed to be scratched. Such a throbbing desire coursing through her veins, screaming for freedom.

“What can I do to distract myself?” she thought. A casual spell to organize her books? No, that felt too mundane. A trip to Sugarcube Corner for a cupcake? While sweet, it wouldn’t quench the deeper need stirring within her. Maybe watching a race between Rainbow Dash and Applejack, the adrenaline pumping through her as she cheered on her favorite. Staring deep into the sweat glistening off their... sexy bodies.

"Nope, not going to work!!" She screamed at herself, slamming her feet into her covers, feeling her hands slip past her skirt. The cool touch against her slit made her body tingle. "No... I need to begin... Designing it..." Her voice was a whisper, her mind swirling with fantasies of the gorgeous white mare.

The truth was she needed this release. A way to express the overwhelming lust swirling inside her. Her body ached, and the only thing that would soothe it was a long, hard, and intimate session with the royal dildo. "Damn, my horny cunt!! Flash get in here!!"

With that word, her closet opened up, and smoke bellowed out. When the magic settled, a pair of blue eyes shined out of the blackness. Stepped out was a very rough robot stallion. It was a poorly designed replica of that human from beyond the mirror mixed with some details of that one guard from the Crystal Empire that he shared a striking similarity to. Twilight lifted her head and admired the figure's design and state. It constantly puffed smoke and cranked with loud gears, but its cock was absolutely perfect. While it was enough for her, she feared the version for Spike would need to be far more accurate.

"How may I serve you, Princess?" the robotic figure asked, his voice sounding slightly distorted.

"I need your cock!!" She demanded, locking her room up tight with a powerful soundproof spell. After this, she leaned back and pulled down her panties.

The machine tilted its head and gave a loud popping sound. Carefully it walked forward to the edge and the bed. Twilight lifted her legs and wrapped a spell around his metal hips. They opened up to reveal the royal dildo, ready and willing for her. With a grunt, the fake Flash pushed his rod deep into the mare's waiting pussy.

She moaned loudly, her body arching at the sudden intrusion. It was a familiar feeling, but still a shock nonetheless. The machine thrust into her, its rhythm slow and methodical. Each stroke sent waves of pleasure through her. She could feel her walls stretching, accommodating the thickness of his length.

The pleasure built within her, the tension coiling tighter and tighter. "Yes, yes, more!!" She moaned, her eyes rolling back as her body shuddered. The alicorn pinched and twisted her breasts out of her shirt, making sure she had plenty of room to enjoy her body.

The Flash Bot responded, increasing his speed. His movements were precise and calculated, the dildo hitting her g-spot just right. The machine knew exactly how to satisfy her, his thrusts hitting her deep. Yes, this experience helped a whole lot. Now she could make sure Spike's present could satisfy him in the same way her own machine did for her.

"I am... getting... close!!" She cried out, her walls clenching around the robot's length.

The machine increased its speed even further, its hips moving like a piston. The pressure inside her was becoming unbearable, her body writhing under his mechanical ministrations. She shivered and shutter, rolling onto her belly, pressing her hips back and forth onto it.

Her legs parted wide, giving the machine full access to her tight pussy. The machine adjusted itself, penetrating her deeper and deeper, its length filling her completely. She felt the wave of her orgasm approaching, her muscles tightening. Her body shuddered, the sensation overwhelming her. Her mind went blank, the world disappearing around her as she rode the ecstasy. The image of this facade of another former lover was replaced by the other one in her mind. The thought of her and her naked body and her moans were the final trigger, pushing her over the edge.

"No... No... Rarity!!" Her body jerked and trembled, her orgasm hitting her with force. Her juices flowed, coating the Flash bot's dildo. Her muscles contracted and her toes curled, the pleasure spreading through her. Her mind was a haze of lust and euphoria, and her body was overwhelmed by the sensations. The machine kept pumping into her, making her spasm even harder. Sensing her climax, it opened a special compartment above the metal penis. This revealed a small hose that blasted fake semen all over her back. The warm sensation sent her into another wave of pleasure. She collapsed onto her bed, spent and satisfied.

After a few moments, the robot retracted its dildo and walked back into the closet. "That was so good," she gasped out loud. "But my little brother deserves so much better than this..." she smirked to herself. "Yes... his Rarity Bot needs to feel so real..."

******

Author's Note

Yes, this was planned to be longer, but brain frying right now. Just wanted to clean this up and post it. So sorry if this one feel a little rough compared to chapter one.