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Twilight Hour by NotScribble
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>Inspired by derpibooru.org/1348832. Takes place on a timeline before Twilight became a princess and without Cadance.

>It started out innocently enough.
>Genuine platonic love between a brother and sister.
>Little jokes here and there.
>Harmless flirting to make the other uncomfortable.
>The occasional bump.
>As time went on, they grew used to each other's antics and had to step it up.
>Flirting became less of a joke and more of a sexual innuendo.
>Eventually it became too obvious to both of them that there may be some truth inside those jokes.
>Some truth neither of them were sure they wanted to explore.
>What would everyone else think?
>What would their parents think?
>What would they think of themselves?
>However, It quickly became clear that none of these questions mattered.
>All that mattered was how they felt about each other.
>All they needed was each other.
>Twilight was the one who initiated the conversation about the possibility of growing their relationship into something more.
>He had always protected his sister and didn't want to hurt her in any way.
>Shining Armor would never have asked if she didn't.
>But she did.
>His answer was a cautious yes.
>She wanted this, and so did he.
>They gazed into each other's eyes and simply nuzzled for the longest time.
>Nuzzling led to kissing.
>Kissing to something more.

>It had been over a year since this relationship started and they were now visiting their mother in Canterlot for the holidays.
>Their father unfortunately couldn't make it as he had business elsewhere.
>Spike was taking this opportunity to catch up with Princess Celestia.
>That just left Twilight, Shining and Velvet enjoying a nice meal together.
>They laughed and talked about days past.
>The topic of either of them finding a mate was awkwardly waved away.
>They hadn't told anyone yet.
>They never intended to, either.
>It would only complicate things.
>Shining idly poked at the remains of his meal with a fork.
>Velvet looked over at her son.
>"Shine, even after all these years you still won't finish your food?"
>He looks up at her and shrugs.
>"I just can't eat that much."
>She shakes her head.
>Twilight rolls her eyes.
>"Oh mom, leave poor Shining alone. He can't handle a real meal anymore after all the time he spent avoiding cooking for himself."
>Shining grunts and takes another bite.
>"It's not like you cook all that often either, Twily."
>Twilight pokes her tongue out at her brother and he responds by making a silly face of his own.
>"I have such mature children. It's a wonder either of you are still single."

>After their meal and the following clean-up, they all enjoyed some pleasant discussions before turning in for the night.
>Their old rooms were largely the same as they left it.
>Childhood interests decorating the walls and echoing fun from days long passed.
>Shining lays across his bed as he looks around the room to take in all of his old memories.
>The door creaks slightly as it slowly swings open.
>A dim purple glow from a unicorn horn reveals Twilight's face as she enters the room.
>She bites her tongue and she carefully closes the door behind her.
>Shining doesn't sit up, but he whispers across the room.
>"Twily, I hope you're not thinking of-"
>She cuts him off with a shush and approaches his bed with a happy trot.
>"Mom has been asleep for hours. I checked."
>He rolls over on his side to face her, his stern face a stark contrast to her happy grin.
>"Even so I don't want to risk getting caught. It's only a couple days. We can wait that long."
>She scoffs.
>"Maybe you can, but I can't."
>She nuzzles into his neck.
>"You know what season it is."
>He pushes her away gently with his hoof.
>"I'm aware, but that's just all the more reason we wait."
>Twilight props her forelegs on the bed and pulls herself above him.
>"You never read that book about estrus I sent you, did you?"
>Shining rolls his eyes.
>"Yes, I read the one about estrus, and mating habits, and emotional bonding, and even that weird one about the spiritual realm and its interaction with the prime material plane around us."
>"To be honest I just kind of wanted to get rid of that last one."
>"So you sent it to me? You're so thoughtful."
>She smiles once more.
>"You know I'm very generous."

>Twilight pulls herself up onto the bed and gives Shining a long kiss.
>Once she breaks away she positions herself over the top of him and turns around.
>Shining sighs.
>"You always have to get your way."
>She places her muzzle near her brother's sheath and briefly inhales his musk before replying.
>"Oh please. How many times have you begged me for attention when I was busy studying?"
>"At least a f- Oh..."
>Twilight delicately licks the tip of his sheath and slowly circles her moist tongue around the opening.
>He moans slightly and she pulls her head away from his engorging member.
>"Of course we can stop if you really, really want to."
>She looks back with a smirk.
>He props up and eyebrow and frowns but doesn't say anything.
>She nods to herself cheerfully.
>"Good!"
>With that she returns to her work.
>She leans down and carefully runs her tongue from the tip of his member all the way down to his scrotum.
>Once there she begins to gently suckle his generous orbs one at a time.
>Shining leans forward and stops just short of her moist marehood, already leaking in anticipation.
>He breathes in her scent and moans softly once more.
>Twilight pulls away and gives Shining another long lick from tip to scrotum.
>Both of them shudder and she lets out a gasp when he presses his muzzle against her wet opening and begins to clean up the entrance with his tongue.
>Slowly working around the edges, careful not to miss a drop before plunging his tongue as deep as he can manage.
>Her legs shake and nearly buckle for a moment, but she manages to keep herself standing.
>She moans deeply as she presses her muzzle tightly against the base of his shaft.
>The vibrations send ripples of pleasure through his entire body.

>Shining halts his effort on her marehood to focus on another area, much to her surprise.
>She feels his hot breath followed quickly by his warm tongue against her sensitive anus as he licks over the top of it up to the base of her dock.
>"Shining?"
>Twilight exclaims in a mixture of confusion and pleasure.
>"He doesn't pull away as he replies.
>"C'mon Twily, if you insist on doing something you want then it's only fair you return the favor."
>She looks back at him.
>"We discussed this before, it makes me feel, er, dirty."
>He props up and eyebrow as he looks into her eyes and continues.
>She cringes a bit but ultimately sighs and returns to his fully engorged member.
>It twitches as she wraps her lips around his tip and swirls her tongue around his urethral opening.
>This elicites a moan from him, one that she feels vibrate directly under her dock.
>Despite her objections and how it makes her feel emotionally, physically she admits it feels fantastic.
>She moves her maw further down his shaft and swaps between swirling her tongue around his glans and gently suckling, as if she were nursing.
>Shining decides to step up his game and plunges his tongue into her anal ring.
>Twilight's gasp is muffled by his member and he grins.
>Rather than object once again she decides to do the same.
>With great effort she pushes her maw down around his preputial ring and his glans reach the back of her throat.
>This time he's the one who gasps, much to her satisfaction.
>Her eyes water slightly as she pushes herself to the limit.
>By now Shining has thoroughly cleaned her entire hindquarters, inside and out.
>He plants a kiss on her marehood just as the room light flicks on.
>Shining's head jerks in the direction of the doorway, his eyes as wide as dinner plates and pupils like pin pricks.
>"Mother?!"
>Twilight pulls her maw off from around his member with a slight wet popping sound and ends up flopping over onto the floor.

>Neither of them are capable of forming a coherent thought, let alone a sentence.
>They both scramble to hide their genitals and begin babbling nonsense while glancing all over the room.
>It takes a moment before they each calm down enough to notice Velvet isn't looking down at them with disgust, but rather something else they find shocking.
>It almost looks like pride.
>She's grinning from ear to ear as she sits in the doorway and nods to herself.
>Finally Twilight manages to speak clearly.
>"Mom? Why are you..."
>She drifts off, a bit afraid to complete her sentence and still stunned by her own embarrassment.
>Velvet stands and approaches them both.
>"I was hoping this would happen on its own, truly. I just never imagined it would."
>They both glance at each other before returning a look of confusion to her.
>"You remember the stories I've told you both about how your father and I met, but I left out a small and very crucial detail."
>She presses her hoof over her muzzle as she stifles a giggle upon noticing Twilight's leaking marehood.
>"Your father and I are brother and sister as well. It's been a family tradition that began with our own grandparents."
>Twilight squints up at her.
>"You... You and dad? You're-"
>She nods.
>"It's not as strange as it sounds. Many of the higher class families keep to themselves. To keep their bloodline pure, so to say."
>She leans down and nuzzles her daughter.
>"You didn't think both of your natural abilities were an accident, did you?"
>Twilight stands up and backs away from her mother.
>"I, that's, it's a lot to... What?"

>Fully covered in blankets, Shining Armor moans to himself.
>"That can't be true. Why doesn't anyone talk about it if it's so common?"
>She shrugs.
>"It's best to keep family matters between families."
>She places a hoof on Twilight's cheek.
>"My dear sweet Sparkle, I'm so proud of you."
>Twilight gasps in confusion, but manages to smile as she looks into her mother's eyes.
>"Um, thanks mom, I guess?"
>She then turns her attention to Shining.
>"And my son, look how big you've grown."
>He attempts to keep himself covered, but she throws the blanket aside with magic.
>Velvet looks over him carefully.
>"You look magnificent, son."
>His face could not possibly be more flush, and he doesn't respond.
>Velvet looks over at Twilight once more and lowers her head slightly.
>"It's time to finish what you started."
>They both scoff at the thought.
>Shining is the first to voice his objection.
>"Mother?! I'm not about to, you know, especially in front of you!"
>Twilight joins in.
>"We've never even gone that far! It's too risky! What if I-"
>"Became pregnant?"
>Their mother finishes her thought.
>"My dear Sparkle, that's the point. Where did you imagine your relationship would lead? A childish fling for the remainder of your lives? You will both continue our family line. It falls to you now."

>They both look at each other and grimace.
>Twilight looks down.
>"I guess I never put much thought into the future. I just like where we are now. I'm fine with it staying this way."
>Her mother approaches her.
>As she gets close Twilight looks up and Velvet plants a deep kiss on her lips.
>Shining's jaw drops open and Twilight gasps in confusion, but doesn't pull away.
>When they break the kiss a string of saliva keeps their lips connected.
>"I understand how you feel. I was once in your place and my own mother in mine. However, it is something I'm sure you both desire deep within. It's in our blood."
>Twilight's heart speeds up and rather than speak again she leans in and plants her own kiss on her mother's lips.
>Velvet smiles and presses her warm tongue into Twilight's mouth to explore her teeth and wrestle with her tongue.
>Her mind races.
>It's wrong, isn't it?
>But.
>But...
>Twilight moans into her mother's mouth and her legs quiver.
>She needs this.
>Once she looks over at Shining she sees confusion in his eyes, but his member remains solid as ever.
>She smiles at him and nods an unspoken understanding.
>He smiles meekly and in turn she props herself on the edge of the bed once more to plant a deep kiss on his lips.
>Their tongues meet and they swap each other's flavors.
>She can taste herself on his tongue and he can vaguely taste what's left of himself on hers.
>Twilight lets out a heavy moan into Shining's mouth as her mother runs her tongue along her vulva.

>Twilight pulls away and pants as she speaks.
>"I can't wait anymore Shining. I need you. please."
>She climbs up onto the bed and straddles herself across his chest, quickly lining herself up with his throbbing, leaking member.
>He looks over as his mother and then back up at Twilight's pleading eyes.
>With a nod from him she presses down against him and rubs her marehood along his shaft from base to tip.
>Once she reaches his tip she presses herself down on him and it slips inside of her with a wet slick noise.
>"Ah!"
>Her tongue lolls from her maw as she looks up at the ceiling and shakes from the sensation.
>Shining gasps slightly as she slides down his shaft, feeling every inch of her as she goes.
>"Oh, Shining!"
>She squeals in ecstasy as she pulls back off of him and presses down once more, attempting to take in even more of her brother's length.
>Shining doesn't notice his mother climb onto the bed above his head.
>He's far too focused on Twilight.
>It's not until she leans down and plants a deep kiss from above him that he remembers she's still there.
>He's not as enthusiastic as she is, but she drives her tongue into his maw and explores thoroughly.
>After a few moments he becomes more interested and begins playing with her tongue using his own tongue.
>The pressure is building quickly.
>Too quickly.
>There's too much stimulation.
>Almost as if she senses his distress, his mother breaks their kiss and stands over the top of him.
>Her marehood drips onto his nose and she smiles down at him.
>He in turn stares up at her beautiful glistening vulva.
>"It's estrus for me as well, my son. I could use some help."
>She didn't need to ask.
>He leans up to run his tongue along her moist lips and take in her taste.
>It's so familiar.

>Velvet lets out a happy gasp and she falls forward slightly.
>Twilight looks down from the ceiling into her mother's eyes.
>Shining begins to say something, but Velvet presses herself down onto his face effectively cutting off his words.
>She then wraps her hooves around Twilight's waste and presses her down onto Shining's shaft until he hilts in her.
>His legs start bucking and Velvet presses her lips into Twilight.
>Their tongues meet Just as Twilight feels Shining's member flare up.
>It's time.
>Her entire body shakes harshly in extreme ecstasy as she reaches orgasm simultaneously with her brother.
>His seed pumps deep within her, pulse after pulse.
>Twilight moans long and loudly into her mother's mouth and Shining into her marehood.
>Once the convulsions stop Velvet breaks the kiss with a satisfied smile.
>She once again runs her hoof along Twilight's cheek who in turn smiles at her between pants.
>Without another word, she climbs off of Shining Armor and hops down to the floor.
>Twilight collapses forward onto Shining's chest, still quivering with his member still fully buried deep inside of her.
>Cum begins leaking out around the edges of her marehood.
>Once they catch their breath she and Shining share another long, passionate kiss.
>"I love you, Shining."
>He wraps his hooves around her and squeezes her tightly.
>"I love you too, Twily."
>With one final peck on her muzzle, they both lay there together until slumber takes them for the night.
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