The shrill whistle of the Friendship Express signals their impending departure, a few extra blasts added at the end. Steamer, like everypony stuffed into the engorged train, wants to leave as soon as possible. Nopony wants to be late for Princess Twilight Sparkle’s coronation ceremony, especially with the mare in question on the train in question.

Way at the back, Doug waves to Applejack as he shuts the door on the second to last car, turning back to the other two ponies in the room. The cramped cargo car doesn’t leave a lot of room for maneuvering, but he is able to get to his mat without stumbling over them. The cotton sheet underneath is light against his skin, the spring breeze picking up as the train gets moving.

Next to him, Starlight Glimmer is laying on her side, her two gray bars of a cutie mark (for real, courtesy of Twilight Sparkle) occasionally covered by her swishing tail. Like everypony else she is exhausted from the late night, and the party thrown by Pinkie Pie afterwards celebrating Princess Twilight’s ascension.

Speaking of, Twilight settling down next to him, but her breathing is not of a mare tuckered out from the day’s and night’s activities. Putting everypony’s cutie marks back the way they belonged (besides Starlight’s, but that’s the way she wanted it) couldn’t have been easy. And yet, there the lavender unicorn alicorn is, awake and alert as if the day was just beginning.

Doug stares at the ceiling, hands clasped behind his head. Not much to look at up there, and out of the corner of his eye he can see Twilight unfolding her wings, then returning them to her sides. Probably just getting used to the new appendages, and a little anxious after crash landing in front of a tipsy Rainbow Dash.

“So,” Doug remarks to nopony in particular. Starlight Glimmer stirs slightly, uncomfortably shifting. “Two foals, huh? Shouldn’t be too bad.”

“Two?” Twilight asks from his side, confusion plain in her voice.

“Applejack and Rarity,” Doug explains, turning his head slightly to regard Starlight. He gently rubs a hand along her neck, eliciting a low coo. “I guess I don’t really count you, since you’ll be going back to Our Town.”

Starlight grunts as she shifts her mat, then plops down next to Doug. He turns to his side, graciously allowing her back, warm in the cool night, to rub against his naked chest. Her mouth reaches for his own. Doug accepts the kiss, slightly curious at the normally indifferent mare’s actions. She smacks her lips as she pulls back, her tail flicking wildly between his thighs.

“Who knows,” the pink unicorn sultrily says, “if your fillies succeed, I might be out of a home.” She nuzzles Doug’s neck, her tail occasionally flicking a little higher on his body. “If they do it fast enough, she’ll be born here.”

“Okay, so three, maybe.” Doug can’t help but hope; if the Cutie Mark Crusaders are able to help out the villagers in Starlight’s Village? Maybe he will be able to see more of the unicorn. He raises an eyebrow as Twilight shifts her own mat, snuggling next to him as well. “Don’t tell me. Four?”

“Mm,” Twilight purrs, a light nip to his ear before she finds the same spot under his chin, opposite of Starlight. She lightly tugs with one hoof, eager to access more of her stallion. “Definitely four.” One hoof strokes along his side, then slips lower, playing against his hip. “Plus, Cadance keeps pushing me.” The slight whine in her voice has nothing on Rarity. “And she gets Shiny to help! Anything to get my brother off my back.”

Starlight snorts, and Doug can’t help but smirk.

“Not like that!” Twilight swats at both of them with her wings, her hoof forgotten. “Eww!”

“Speaking of Princesses, if Celestia and Luna join?” Doug shudders, one hand leaving Starlight’s side to caress Twilight’s hoof. It mostly works, the mare now back to stroking his stomach. “Hopefully they can find some nannies in Canterlot.”

“Actually,” Twilight says, pausing in her ministrations to go into lecture mode, “it’s traditional for the sire to take the foal. Since the dam is assumed to be busy with, you know, her job.”

“And I’m not busy with my job?” Doug retorts. Starlight presses against him, demanding more of his attention. His hand leaves Twilight to join the other kneading into Starlight’s back. Her breaths come hot and heavy, light moans as her tail reaches high enough to tickle his groin.

Twilight stares at Doug for a few seconds, mouth gaping open. “You realize you’re comparing crafting weather schedules, an admittedly difficult job not many ponies want, with running the entire country?”

Doug rolls his eyes, the action made harder by the mare doing an excellent job of getting him excited. “Fine. Five and Six.” He can feel his own hips shift, eagerly anticipating driving himself into her willing depths. Too bad he has to wait. “They’ll probably want to visit all the time. I hope.”

“I should hope so, too.” Twilight drops down, resting her head against Doug’s side and sniffing loudly. “Plus, you’ll have all of us around to help.” Her muzzle curls to a smirk. “I just hope they don’t get super hungry or something when their dam isn’t there.” Twilight’s nose scrunches as she watches Starlight, the pink mare’s squirming getting more and more intense. “Your heat start already?”

“Oh, yeah,” Starlight groans out. She firmly presses her back against Doug again, moaning. His hands stroke down her back, drawing out louder and louder moans the closer he gets to her dock.

“Hmm,” Twilight says, pulling out a few pieces of paper from her luggage. “I recorded Rarity’s various hormone levels. And Rainbow’s, too.” She glances at Doug. “She’s gone into heat already, so be careful if you don’t want to make it seven.”

“They outnumber me already, what’s one more,” Doug says blithely. Not that he doesn’t enjoy this, but the mares are generally a tad insufferable when they are in heat. Their bodies demanding things of them, heedless of whether they may or may not be in a position to want another foal.

“So, let’s just compare this.” Twilight’s horn shines bright enough to make him wince, Starlight angrily yelping. Twilight’s eyes turn white as she inspects Starlight, focusing mostly on her belly. “Okay. Okay. Okay. Hmm.” Twilight rests a hoof on Starlight’s side, rotating the mare so that she is fully exposed to the alicorn. “Okay.”

“That supposed to mean anything?” Starlight huffs, glaring up at Twilight and obviously frustrated at not having her heat quenched yet. And Doug is starting to feel the same way.

Twilight taps a hoof against her chin. “So, you are definitely in estrus.”

Starlight groans, a hoof coming up to rub her foreleg. “Tell me about it.”

“But, from what I can tell, you haven’t released any eggs. And none seem to be mature.” Twilight frowns. “Now, when Doug went away back in December, I spent a couple days in the Royal Archives researching some fertility spells. I think this one should do the trick!”

Twilight maneuvers herself between Starlight’s hind legs, laying her horn on Starlight’s exposed belly, just above her teats. The air around them seems to still, despite the poorly insulated train rolling along at full speed. Twilight’s horn glows softly, and for long seconds she does not but sit there, eyes half closed as she focuses.

Starlight winks, and not with her eyes. Twilight is too busy concentrating to notice, but Doug slips a hand between the two mares, teasing the light red nub. He grins as Starlight moans, almost loud enough to disrupt Twilight’s casting. A second stroke nearly gets her hind legs to buck, though fortunately Twilight wouldn’t get kicked. Much.

After nearly a minute a ball of light pulls away, absorbing into the left side of Starlight’s belly. Twilight grins at a job well done, not noticing (or pretending not to notice) the panting of the mare underneath her.

Starlight taps the spot on her belly with a hoof as Doug pauses. “Did it work?”

“Let’s see.” Twilight’s eyes shine white, returning to staring at Starlight’s belly. “Yep! Wait. Huh.”

“Huh?” Starlight mimics. “I don’t like the sound of ‘huh’.”

“It’s… probably nothing.” Twilight meekly smiles, then glances down as Starlight winks again. She sits there for a few long seconds, just staring at the marehood. “Just, um, I may have put a little too much into the spell. Don’t know my own strength and all.”

“Twilight…” Starlight growls out, her legs inches away from locking the alicorn in a headlock.

“It’s fine! Probably!” Twilight backs up slightly, though there is not a lot of room to maneuver in the train car. “The egg is just maturing a little faster than normal. It should wear off as soon as it’s released, and then it'll be just like a normal egg!”

“This better work,” Starlight says, trying to relax and lay back down. “How long is it supposed to take?”

“Normally? About two days. Your egg, though… let me just say, it’s already on its way.” Twilight’s horn pulls out a sheet of paper. “You can cast it on a mare before she’s in heat, and as long as she goes into heat by then it’ll be fine. Otherwise, the egg will be released, and without estrus preparing a mare’s body for implantation it’ll get, well, lost.”

“And if they’re already in heat?” Starlight asks, taking the sheet of paper by hoof and reading through the spell.

“You’ll need to wait at least two days. It’s not an exact thaumic, since every mare is different and all. So multiple attempts with a stallion, spread out over a few days, is highly recommended. Unless you've got a way to detect it, and I do and I can give you the spell, but let's assume you're not there. Or only there for the start."

Twilight coughs nervously as she stares at Starlight’s marehood. "Also, you’re not supposed to cast the spell on a mare who will ovulate normally. Nothing bad will happen, but it's kind of like giving hormone treatments to a mare who will conceive normally.” Twilight pulls out another page. “I’m assuming that the stallions will need a similar spell cast on them, but I’m not sure. After all, if half the equation doesn’t work, there’s not a lot of indication about the other side.” Yet another page comes out, longer and filled with writing. “This is the scanning spell I used-” she circles a few sections “-and these are the spots you should focus on when using it on a stallion.”

“None of this looks too bad,” Starlight says, a hint of a smile despite her discomfort. “Mind if I test it on you?”

“Well, you probably shouldn’t, but my cycles are generally pretty regular.” Twilight rolls over, laying on her back and splaying her legs. It’s hard to make out anything through the light fur. “I’ve got another four days, at least, so you should be safe.”

Starlight double checks the spell, then extricates herself from laying against Doug without too much trouble. She gets up, resting her horn on Twilight’s belly. Starlight’s tail flicks to the side, as does her head, winking at Doug. After a few seconds she frowns. “I’m not really sensing much.”

“Hmm, I was afraid of that.” Twilight depresses her taut stomach with a hoof. “I had to power through a bit, and without your cutie mark you might not have enough to break through.” Twilight shifts slightly, a hoof spreading the hairs that cover her marehood. “You’ll have to get closer.”

Starlight gapes at Twilight’s marehood, pink tunnel clearly on display.

“Maybe use your tongue a little,” Twilight prompts, her wings spreading out to push herself up. “I’ll help out here. Simple dulling spell, so you don’t poke me.” Twilight winks. “Too hard.”

Starlight grins as she lowers her head. A few quick licks to the outer lips gets a delightful quiver from the alicorn, and only serves to drive her deeper. Bigger than most mares she’s been with, but not my much. Her tongue laps, searching for what she knows is the alicorn’s weak spot.

Starlight gasps as Twilight’s mouth envelops her horn, though she is a little amazed at how practiced Twilight seems to be at it. A few quick bobs is all she gets, though, before the alicorn pulls away, leaving a long string of saliva trailing from her spire. And then Twilight casts the spell to make her prick not so pointy. Too bad none of this is helping with her own heat!

“Ready when you are,” Twilight says, laying back and rotating her hips to give Starlight better access. “Need me to help guide it?”

“No,” intones Starlight, inwardly grimacing at not getting more of a reaction from the alicorn. Maybe she practices with her herdmates? Her horn lowers, slipping up and down against the slick lips before finding that perfect little hole. Score!

Starlight pushes in, half of her horn disappearing into Twilight’s love tunnel. She pulls out, leaving the barest fraction remaining, before plunging in again, this time three quarters of the way inside. She pulls back again, grinning at Twilight’s grunt of pleasure, then driving her horn in until her mane rests against Twilight's marehood.

For Doug, the final action is too much, especially with Twilight basically telling him Starlight is ready. He gets up, hand gripping the pink unicorn's flank, squeezing her cutie mark. The other strokes himself, lining up with the pink pony plot perfectly positioned for penetration. "So, I've been told I need to work on my assertiveness." He slaps Starlight's flank hard, trying to turn the gray bars the same pink as the rest of her.

Starlight gasps at the contact, her head trying to jerk up except that she is firmly embedded in Twilight’s loins. The alicorn moans loudly, her hooves trapping Starlight’s head in place. Panic begins to spread through the unicorn, her writhing getting her nowhere except another seductive groan from Twilight.

“It’s okay,” comes the steady voice of her stallion. No, Starlight tells herself, her stud. The stud. Just doing what they need to do. She had asked them for this, it just came a little sooner than she thought. Another slap rings out, on the other side this time. "Ready?"

“Remember,” Twilight’s husky voice comes at the same time that Doug penetrates her eagerly waiting folds. Starlight would scream if she thought it would do any good; her body, though, seems to have other ideas, slowly getting into the rhythm of things. Traitorous legs, standing still! “You’re supposed to be casting a certain spell?”

“Ughh,” Starlight moans, doing her best to keep her cool. She tries to focus as Doug pushes further inside her. Her heat surges, her body already trying to clench around the stallion and force him to give up his precious seed.

And then he pulls out, leaving her wanting even more. She grits her teeth as she runs through the spell, his constant motion messing with her worse than he's going to mess up her insides. She’s Starlight Glimmer, and she does not mess up magic! She’s just as good as Twilight! Better, even, because she can do this while being rutted! Doug’s slow thrusts distract her, of course, but she powers through. She has to!

“Ooh, tingly,” Twilight remarks after a few minutes, hooves finally releasing their hold on Starlight’s head. After the first ten seconds they weren't necessary, but the look of that mare impaling her was just too much to want to let go. Twilight pulls herself off the unicorn’s horn, slipping backwards. A bit of her own juices seeps out, but other mares had never turned Twilight on like the show in front of her is. She licks her lips; soon enough, that cock would be ramming inside her. But not today; no, she wants her 'first' time - as an alicorn, of course - with Doug to be extra special.

Starlight’s horn relaxes, losing the turquoise glow. She made it! Casting the spell won't be too bad, if a little awkward. But Our Town was and is a open, understanding community, and they'll be overjoyed when she returns with the good news! Now, she just needs to wait for this human to finish. It isn't too bad; he’s going pretty slowly. She smirks. Probably all that-

Starlight’s smirk is wiped from her face as Doug redoubles his efforts, pounding her into the mat. She groans, louder and louder as her heat sears into her stomach. What she wishes was pleasure burns through her, her body’s pitiful and painful reminder that she needs him inside her! Her inner muscles clench, doing their best to coax out, to trick the stallion servicing her into giving up everything he has!

Doug groans as he grips onto Starlight’s flanks; the pony standard position is one of his least favorites. But the mare had been too enticing to not take like that! With her legs standing straight in the air, fully displaying herself? And her horn buried inside his mare? Especially now that she is begging him with every inch of her body. He sees no reason to prolong her agony. Not like he could stop himself, anyway. Never had, never would.

With a final primal roar, Doug empties himself into the mare, filling her with that life giving seed. He grins as he pulls out, slumping over. All the adrenaline and exhaustion of the day threatens to catch up with him, and he can barely see that Twilight has her eyes shining white, focusing on Starlight’s belly. The worn out mare lays next to him, her eyes shut and breathing peacefully.

One down.