Chapter 1
It had been two days since the train stopped, and things were getting tense. Night Light hadn't really understood the engineers' explanation of the problem, but it was obvious that it was a bad one. They had sounded confident that they could fix it, but that was a long time ago.
It was technically spring, but they were far enough north that everything was covered in snow as far as they could see. There was no question of going outside for more than a few minutes.
Night Light was just thankful to be traveling with Flurry Heart. Having a private car was the only reason either of them were still sane. Though that was getting close.
He tried to read his book. Even with nothing else to do, it was hard to stay focused. He hadn't planned to be away from Velvet this long, and he couldn't get more than a few pages at a time without missing her. She must be worried sick about them. At least he had the luxury of knowing Flurry was safe, but nopony else did.
His granddaughter stared listlessly out the window, an open book lying forgotten on the seat next to her. She was a Sparkle without question, he could see hints of Velvet's features in her face. She was a pretty, young mare. A long, long time ago when Shining was born, he had worried that he was too young to be a father, not even thirty. Not only had he been proven wrong, but now he was being rewarded for it with the chance to watch his granddaughter grow up. And he would get to see her get well into her own life. He would get to share times like this with her. It was boring and frustrating now, but he hoped she would at least be able to look back on it. He knew it was a story he would be putting into the rotation. It helped to think of it like that, that he was just waiting to find out the ending.
"Fuck my ass!" Flurry said suddenly. She didn't move from her place at the window.
"What?" Night Light asked, once he had realized what she said.
"Fuck. Me. In. The. Ass." Flurry slumped down on the seat. "I'm so bored."
He didn't have the heart to chastise her for the language. Given the circumstances, he'd let it go. Also, he could tell when somepony was trying to get a rise out of him; raising two foals did that to you.
"I know, Flurry. But they're fixing the train as fast as they can. Until then..." He looked out his own window.
Flurry grunted.
Night Light let her. He hadn't really expected to cheer her up. Everything he had said was obvious, but it was worth a try.
Truth be told, the boredom was getting to him too. Sure he already spent plenty of days doing nothing but reading, but it wasn't the same. This time he didn't have a choice in what to do. Back home he could read, he could get up and go read somewhere else, or go for a walk, or rut Velvet.
He smiled at his memories, but he didn't show Flurry. He was getting older, but his libido hadn't slowed down much. His body could still keep up too, he was proud say. He couldn't wait to get home to Velvet. He refocused his thoughts on Flurry. They really had been stuck for too long.
"I should just fly myself. I'm a fucking alicorn, I can make it," Flurry muttered.
"No." Night Light got up and went to her side of the car. He sat down next to her and put a leg over her back. "It's still dangerous. What if you get lost? If you lose sight of the tracks who knows how long it would take to find you? What if there's a snowstorm?"
"Relax, gramps," Flurry said, leaning into his hug. "I'm not actually going to do it. It's way too fucking cold out there. It'd just be nice to do something."
"You're keeping this old stallion company, that's something."
"Sure."
It wasn't an enthusiastic agreement, but it was a genuine one. She was a good mare, Shiny and Cadance were doing a good job. He was proud of all three of them.
Darkness finally started to fall, though the snow remained bright. They watched the glow of the train dim as the cars around them drew their curtains one by one.
They tried to sleep. It was cozy, if not quite comfortable, in their little space. Even so, sleep was a matter of waiting. That was alright with Night Light, rest was still rest. He closed his eyes.
But with no other distractions, the slightest noise from Flurry rang out to him. He could hear her wriggling on the seat, the subtle shuffle of her hoof moving back and forth, rubbing, her tensed breaths. In short, he could hear that she was a healthy young mare.
He wasn't sure if she knew how obvious it was. He wondered if she cared. He'd faced her same choice a few times, and chosen to risk it some of them.
But she had done the same thing the night before. Risking it twice was too much. It spoke of desperation. And he did hear some frustration in her breath, like her teeth were gritted.
He couldn't ignore it a second time. He lifted his head suddenly, pretending to wake up. "Flurry? Are you alright?"
"UHNG!" she started. She looked at him, panting, her hoof frozen between her legs.
A long, tense silence passed.
"Fuck it. I have needs, okay?" She resumed masturbating. "Watch me or not. I don't care."
"Or I could help? I know what frustration sounds like," Night Light said.
Flurry stopped. "Did you just—?"
He nodded.
She stared at her flank. "I, uh... Won't Grandma mind?"
Night Light grinned. "She didn't mind when I helped Twilight out with the same thing."
"Wow, I didn't know you were such a pervert." Her voice was teasing, not disapproving. She bit her lip, hesitating for a moment. "Well, I haven't tried a guy like you before. C'mon over." She raised her tail.
Night Light got up and went to her bench. He could see her take notice of his erection swaying under his barrel. Her sexual bravado faded as he approached. He lay down next to a nervous, uncertain mare.
"This is my first time."
"Don't worry, I'll be gentle."
He hugged her, and used his magic to position the tip of his penis between her legs. Night Light penetrated his granddaughter. True to his word, he pushed himself in slowly, listening carefully to her whimpers and gasps. She was tight, despite clearly being aroused. He hoped he wasn't too big for her, it seemed close. But every time he paused she urged him on.
It may have been her first time, but it was evident that she was ready for this moment. He held her close, watching her mind race as she acclimated herself to the new feeling of having a stallion inside her.
For his part, Night Light remembered the first time he had fucked his daughter. Twily had been a little older than Flurry, but not much. The young mare had come to him and asked him to teach her about sex, and he was always ready to teach her. Especially since there wasn't a lot that he could teach her anymore. Flurry clenched experimentally, squeezing this and that part of his cock, exploring all the things it could make her feel. He saw the same curiosity in her that he had in Twilight.
He stroked her mane. "How does it feel?"
She needed a long moment before she could answer. That was alright. "I-I don't know. But I think I like it. Ah, your dick is so warm."
"You feel fantastic," Night Light told her. "I'm going to start thrusting now. Let me know if it's too much." He began to buck his hips, fucking her with short, slow strokes. Her pussy was tighter than her aunt's. There was a youthfulness to her that was refreshing. It had been a long time since he fucked a mare her age, and he enjoyed the change of pace.
But he was focusing on himself too much—this was her first time for Celestia's sake! He nuzzled her, "Really, you're doing great." She was still a little tense and uncertain, but she had relaxed since they started. She was even starting to push back into his thrusts.
"Nngh, Grampa." She looked into his eyes.
He lit his horn and started rubbing her clit with his magic. She gasped and arched her back. Her wings twitched in the space between their bodies. Gradually he sped up, suddenly getting squeaks out of her. He settled into a good pace, slow and gentle, but stimulating enough to get him off, hopefully her as well. Precum began to leak from his tip, getting churned up along with Flurry's wetness. That was one of his favorite things, he and a mare mixing together.
It meant so much to him that she would share this with him. Even with Velvet, he tried not to take for granted how gladly she shared her love with him, despite the many thousands of times they had been joined like this. And this was Flurry's first time; she was not only trusting him with her body, but her virginity too. He only hoped he could repay that trust and satisfy her fully. She was truly a special mare. She was beautiful, and kind, and intelligent—and more than that, she was his granddaughter.
She squirmed and pushed herself deeper into his embrace. He responded by hugging her tighter and kissing her on the cheek.
The sex was slow and steady, but it could not last forever. All to soon Night Light felt that familiar pressure growing inside him. But there was no way he was going to finish without making Flurry cum too. He wouldn't dream of disappointing any mare like that. It was doubly important for Flurry. He needed to set as high a standard as he could of what to expect from a stallion; she deserved no less. He slowed down as much as he could—which wasn't much—to buy himself some time. His magic massaged Flurry's teats, lips, and clit. The tricky thing was that he didn't know her body yet. He was a quick learner though, and experienced in reading mares' bodies.
As far as he could tell, Flurry had inherited her grandmother's straightforwardness. A simple rubbing, side to side, across her clit had her groaning. He held steady with his magic. The first rule of pleasuring a mare was that when you had found your rhythm, you stuck to it.
"G-grandpa!" Flurry moaned as she crashed over the edge. There were few sounds as beautiful as a mare calling his name as she came. She had always been so darling, so to hear 'grandpa' in the throes of pleasure nearly made him swoon. He had the most intimate view possible of her orgasm. He felt her pussy contracting and squeezing him, felt her heart race, and her body shudder. He could hear her arousal and pleasure too, in the wet squelching of every thrust, and her strained, panting breaths and whimpers of his name.
But as she relaxed again and gave herself up to the afterglow it was his turn. He quickened his pace again. It wasn't even entirely voluntary. Seeing her cum heightened his own arousal even further, and while his cock couldn't get any harder, he could fuck harder. He was careful not to be too rough, but he still sped up quite a bit, enough to start working up a sweat.
With such increased efforts, he did not last much longer. Soon it was his turn to growl her name as he thrust himself deep inside, parking his cock just outside her womb as he came.
Flurry yelped as his flare swelled inside her. Hot cum came rushing out, flooding her tight snatch. He held her close, breathing heavily as his cock pumped away. Even as his orgasm subsided and his penis went limp, he clung to her. That was the advantage of fucking mares you loved: even after the sex was over, simply lying together was heavenly. It was heavenly when sex wasn't part of it too, that was the beauty of love.
Night Light stroked his granddaughter's mane. She was so very pretty. "Congratulations, honey. Now you know what it's like."
Night Light fell asleep quickly. He was disappointed in himself. It wasn't right to do that to Flurry, to take her virginity and just nod off. She deserved time to talk about it, to process her feelings. Alas, his body was not what it once was. Drowsiness seized him and dragged him down into guilty dreams.
Flurry was still nestled in his arms when he woke up. She was still asleep, breathing softly. He hoped she felt as peaceful as she looked. He didn't dare move and wake her, not that there was any temptation to. Quiet mornings passed cuddling a pretty mare were one of his great pleasures in life.
Eventually there was a knock on the door of breakfast being brought to them. That roused Flurry from her sleep. He watched carefully as she opened her eyes and looked at him. He knew she would never look at him in quite the same way ever again—that was how it had been with Twilight: the thing they had done was always present, whether they talked about it or not. She looked at him and she still loved him.
Even so, she positively scurried away from him and back to her side of the car. They ate their food in silence. He was used to dealing with teenagers, so he let her have her silence, especially now. They needed to talk, but that could come later.
It was a little after noon when the train started moving again. There was no announcement, only a sudden lurch beneath them and the groaning of metal. Cheers rang out from the rest of the train.
Neither of them were in the mood to join the cheering, but it did jar them from their thoughts.
"Finally," Flurry said.
The train rumbled beneath them as it built up speed.
Flurry sat in the pose that had become so familiar over their imprisonment, her chin resting on the back of the seat as she stared out the window. She talked without looking back. "I can't believe it took so long to lose my virginity. I was starting to think it would never happen.
Nightlight raised an eyebrow. "You're barely twenty. That's hardly old."
"Easy for you to say," she snorted. "You're not me. You're not a princess, you're not a mare. This should have happened a long time ago, there's tons of stallions who want to fuck me. I'm too picky for my own good, I guess."
Night Light knew his granddaughter as a social, bubbly mare, taking after her mother and grandmother. She had kept feelings like this quite hidden. "Flurry... there's nothing wrong with being picky about sex. If you want it to only be a special thing with ponies you care about, there is nopony in the world who can tell you you're wrong. If last night happened because you trust me enough to share that, then I'm honored."
"It feels like we're both just degenerates." Night Light did wish she would let him see her face during all this. Nevertheless, her tone was more of resignation than judgment.
"Maybe, maybe. All I know is that I've only ever slept with mares I really cared about. Now what can be so wrong about that?"
Flurry grunted as acknowledgment that she had heard him. It was a slow paced conversation. Minutes passed between each remark. "It sounds like you're just making excuses for yourself. You have a wife, remember? How in Equestria is grandma okay with this?"
He smiled, then broke out into a chuckle. "Flurry, your grandma is a slut. When I finally talked myself into fucking another mare she was thrilled. We're not normal ponies, our family."
"Fuck you," Flurry said. "You're trying to make all this sound okay. It's not, it's incest, it's—"
"Do you regret it?" Night Light interjected. "Please, I need to know: do you regret it?" He didn't quite know what he was going to do if the answer was yes, just that he would not make Flurry see him again.
She sighed, loudly and deeply, and was silent for a long time after. "No," she said at last. "I don't regret it. I regret not doing it sooner. I just... I don't know what to think."
"You've got your whole life to figure it out. Trust me, when you've been married as long as I have, you learn a thing or two about how ponies, and relationships work."
Many miles passed before Flurry replied. "Can you teach me how to suck dick?"
"I would be happy to teach you. I taught your aunt Twilight."
He did teach her, as they made their way to the Crystal Empire.
There was a huge crowd waiting to greet them. News of whatever accident had happened had made it's way ahead of them. Night Light wasn't a train pony, he didn't understand what had happened. Yet he was proud to present himself before his children(-in-law). He had watched her, he was glad to say, he would have given himself up for her, he said truthfully.
Cadance and his Shiny took those words to heart.
"Thanks," his son said. "I was pretty worried. But at least she had some company. I hope she wasn't too much."
"Oh no. Not at all. You've done a fantastic job raising her. I couldn't ask for better company to be stranded with." Night Light gave Flurry a knowing look, which she returned. "Though I hope you won't mind if I spend the night. I've had enough of trains for a while."