Twilight peeked around the corner of the station and giggled like a school filly as she took in the site of the huge, handsome hunk that stood stoically beyond the fence. Truly, a more magnificent sire could not be had. He was tall, dark and handsome. So efficient—so orderly—only going where we was supposed to go and doing what he was supposed to do...
She'd never stood a chance, really. With big, powerful extremities and that huge, puffing stack, it was only a matter of time before she would have fallen for him—and boy had she fallen for him! Just the sight of those wheels alone was enough to give her goosebumps.
Of course, she had to keep her feelings a secret from everypony else, lest they lable her mad. Who else but a madmare, they would argue, would fall in love with a train?
She'd tell them who: Twilight Sparkle, that's who! And nopony had better have a problem with that!
But tonight was the night everything changed! Tonight, she would tell him how she felt and reward him for his years of selfless service to Equestria. Tonight, she would love her train like nopony ever could!
Checking to ensure the coast was clear, Twilight teleported beyond the fence and made her way closer to the luscious locomotive. "Hey there, big boy," she whispered, rubbing a hoof along his wide, black plow. "I know I haven't really introduced myself, but I just wanted to know if you were doing anything tonight..." Putting in the extra effort to seduce her long-time crush, Twilight coyly batted her eyelashes.
"I bet you must get really tired hauling around all those big, heavy carts," she rambled, strolling a hoof up the his large steam chest. He was so warm and hard... Twilight fought to maintain a proper facial temperature as her thoughts drifted to more provocative images. "Maybe I could... help you relive some of that stress?"
The whistle chirped.
Giggling as her face heated up against her will, Twilight slid her hooves down the bulky bullgine's main rod. "You like that?" she teased.
The whistle chirped once more.
With a grin, Twilight teleported to the top of her lover and laid upon his roof, taking in the gentile heat from his body. "You're so nice," she continued. "And organized and caring... You bring ponies all over Equestria and you never complain."
She rubbed a hoof against his wide smokestack and giggled when his whistle blew. "You're so sensitive..." Feeling all the more adventurous and encouraged by this new information, Twilight used a hoof to trace the rim of his hole and was rewarded with yet another whistle-blow.
Smoke was beginning to build, and Twilight could feel the heat coming from every direction—things were clearly getting serious. With a happy grin, Twilight licked the neck of the smokestack and took in it's warm, sooty, metallic taste before plunging a foreleg deep into his body.
Warmth immediately engulfed her hoof and the smoke grew thicker. "Oh, yeah, baby!" Twilight cried ecstatically, working her appendage back and forth. "You deserve every bit of this you gorgeous engine you!"
The whistle blew once more and bells began to buzz; Twilight knew without a doubt that her lover was close to firing. "I love you!" she cried as the sounds grew louder and the smoke grew thicker. "I love you so, so much!"
Hot, thick clouds of smoke were billowing out of the engine now. The whistles were near constant. Bells and whistles and charges and clamps and circuits were firing. Twilight cried as a loud bang sounded near the back. "Do you like that?" she asked with a grin. "I want you to know just how happy you make me every time I ride aboard you, you selfless, thoughtful, stolid beauty!"
"Uh, ma'am?"
Twilight's heart froze. With wide eyes, she turned her head to face the engineer's compartment, where a young stallion was standing, quite flushed, with his handkerchief in hoof.
"What are you doing?"