Twilight Sparkle was on a train sitting in the royal cart with the other two of her fellow princesses Celestia and Luna. Three princesses were on their way towards the Crystal Empire after receiving the invitation from Cadance to talk about the trade routes and other matters of the two states. While Celestia and Luna were talking and eating some cakes Twilight was looking outside lost in her thoughts. Twilight was pulled out from her thoughts when Celestia placed her hand on Twilight's shoulder.
"Twilight? Are you okay? You've been oddly quiet the whole trip. I know it's that time of the year." Celestia asked giving her warm smile to her student.
"It's nothing to do with that princess. I just have a lot in my mind no need to worry." Twilight answers and returns the smile.
"If you say so. Remember you can always talk to me about anything." Celestia says and leaves Twilight back to her thoughts. The rest of the trip went on and Twilight was just sitting there and looking outside of the window while Celestia and Luna kept talking. Finally arriving at the station Shining and Cadance were waiting for them at the station with a carriage for them. Seeing her BBBFF, Cadance, and little Flurry waiting for them Twilight was first to reach them and they did their trademark dance.
"Sunshine, sunshine ladybugs awake. Clap your hooves and do a little shake." Both of them sang in a union.
"It's good to see you again Cadance. I missed you to BBBFF and you, especially little Flurry." Twilight said looking towards her brother and her niece.
"As you too Twilight. Aunties, I hope the trip was smooth." Cadance asked from her aunts.
"It was smooth indeed our dear niece." Luna answered and walked next to Flurry and started to play with her.
"Cadance I think we should head towards the castle and start talking about business. After that, we would like to stay as your guests and have some vacation here if that's alright." Celestia asked her niece.
"You are all welcome to stay as long as you wish. I'll make sure you're rooms are made for a longer stay." Cadance answered and started to walk towards the carriage which took all the royals into the Crystal Castle.
Before the meeting had a chance to begin Twilight pulled her brother to the side while having a small blush on her face.
"Twily? Are you alright? Have you taken your potion? Your scent is so strong right now." Shining asked feeling the effects of Twilights heat on his own body.
"I have, but it must be really bad this year. But I have something else to show you. You know our family line is one of the strongest unicorns in the land. So I did little research but managed to find little about our history. That is until I found this in Celestia's personal library and took it." Twilight talked and handed a massive book to Shining with a star on the cover and letters written in artistic ways indicating the word "Sparkle".
"Are you mad!? Getting into Celestia's private library!" Shining tried to yell as silently as he could after hearing where his sister had found the book.
"You should open the book. I think Celestia has hidden this for a reason." Twilight said while having a smile on her face. Shining let out a sigh and opened the book coming to the latest page. All the color drained from Shining's face upon seeing his family tree. All the lines tie brothers and sisters together. Shining even noticed that Cadance was in their family tree first cousin to him and Twilight.
"This... This can't be real. This must be some sort of joke. I have been banging my cousin all this time?" Shining said never looking away from the book's pages.
"It is Shining. Mom and Dad are brother and sister like their parents and so on. I already talked with mom and dad and they confirmed it to be authentic." Twilight explained her face turning an even darker shade of red.
"Why are you showing this to me? I get it I too wanted to know more about our family and it's pureblood like mom and dad used to say." Suddenly it clicked in Shinings head.
"Twily... You can't possibly mean to..." Shining spoke but didn't get to finish his sentence Twilight pushed her lips to his giving him a long and loving kiss. After a short moment that felt like an eternity to Twilight, they released the kiss getting oxygen to their lungs.
"You once promised to take me as your wife. I have been saving myself just for you. I want to be your second wife. You're the only one I trust enough." Twilight said pouring her heart out to her brother.
"Twily... we were foals back then. I... I don't know. I'm so confused right now." Shining said looking like his world had just been shattered. They got interrupted by a guard asking them to attend the meeting in the council room. Both of the siblings gave a nod to the guard and followed him into the room.
The meeting was pretty simple. Talking about possible trade routes. The items of trade and protection between both of the kingdoms. During all of this meeting each time Twilight looked towards her BBBFF he looked away as if scared of her. This wasn't what she wanted. All she wanted was his brother he had after all promised her a long time ago that they would be together as husband and wife. The meeting was simple and painfully long after hours of talking it finally ended and Shining left in a hurry after whispering something to Cadance. Twilight didn't want to push him away so she decided to move to her visitor suite at the castle and hopefully talk all of this out tomorrow. Twilight was sure she could make him see her not as a sister, but as a mare.
Cadance was breastfeeding little Flurry while Shining was sitting silently on the couch in his and Cadance's bedroom. Seeing this Cadance sits next to her husband while Flurry is greedily sucking milk from her nipple.
"Is everything alright Shiny? You look like you have seen a ghost of Sombra." Cadance said jokingly.
Shining looked at his wife, his cousin, but he didn't feel any disgust although he and Cadance had kept it in the family so to speak without knowing.
"Caddy... It's complicated." Shining answered while rubbing his daughter's hair.
"Oh... feisty little sucker. Just like her dad. What did you talk about with Twilight to make you this sour? You were oddly silent during the meeting." Cadance asked while worry started to show on her face.
"How should I put this... It's family drama so to speak. I know we promised no secrets between us, but this is something I feel like I can't talk about. I feel ashamed of it." Shining said while looking towards the crystalline floor.
"I see... So that book was our family tree wasn't it cousin." Cadance said which in turn made Shining raise his head and face her with a dumbfounded look on his face.
"You knew? How long?" Shining asked.
"Shortly after we got engaged. You don't think Twilight is the only one who can break into aunties library. At first, I was thinking about breaking up with you explaining the situation, but then I realized it wouldn't matter. We love each other and that's all that matters. Perhaps the reason Flurry is Alicorn is the result of our family tradition my sweet and sexy cousin." Cadance answered and seductively finished the sentence.
"But... Aren't you disgusted with our situation?" Shining asked and was surprised by the answer Cadance gave.
"I love you Shining Sparkle Armor. I married you knowing we are blood-related. But the question is are you?" Cadance returned the question to Shining. Shining was deep in thought he loved Cadance there was no question about that. And he loved their daughter. The more he thought about their situation and their family all he could feel was love. Sure it was different and it wasn't unheard of cousins or siblings marrying.
"I love you Cadance and it doesn't matter if you're my cousin. You're my wife and mother of our child first." Shining answered getting a kiss as a reward from his wife.
"There is more isn't there? Something about Twilight and you getting married?" Cadance said again making Shining wonder if she really could read minds.
"I... Yes, it's about Twilight she wants me to take her as my second wife." Shining said deep in thought.
"If you want my blessing to form a harem you have it just like Twilight has it." Cadance said in a calm voice.
"Wait... You talked about this with Twilight?" Shining asked baffled once again.
"Of course I did. All I need to know do you love her as you do me?" Cadance asked having a stern look on her face.
Shining was thinking sure he loved Twilight he wanted to keep her safe from harm all the time and sometimes his friends at the guard joked about him being possessive over his sister. The more he thought about it the more he could see all his acts towards Twilight were more than just protective brother and Twilight as the smart mare she is had seen them before he had.
"Yes. Yes, I do love her as much as I love you." Shining finally answered and felt like a heavy burden had left from his shoulders.
"Then go to her. Show her you love her not as a brother, but as a stallion. She has the penthouse suite." Cadance said while rocking Flurry on her arms. Shining had a smile on his face and got up, but before he left their room he turned around to face his wife.
"You planned this all out didn't you?" Shining asked.
"Perhaps... Now go on and show her a good time." Cadance said and was taken aback by Shining giving her a kiss to her lips before leaving to see Twilight.
Twilight was laying on the double bed of the penthouse suite only wearing her bra and panties feeling her heat getting worse each second. She was currently texting her friends back in Ponyville that she should be heading back home soon. After that was done she laid down her phone on the table next to her bed. The heat was making her crazy so she slid her fingers under her pants and started to rub her clit hoping to lower some of the pain her heat was putting her through. She was almost there she could feel her release coming until she heard a knock on her door.
"What is it now! I'm busy! Come back later!" Twilight yelled clearly annoyed by the interruption.
"It's me. May I come in" Twilight heard a voice she instantly recognized as her brother. Quickly pulling sheets over her she used her magic to unlock the door.
"Come in BBBFF it's open." Twilight answered and Shining entered. Shining could smell her sister. The scent was so strong it was making it hard to think, but he did his best to resist it for now at least. Shining walked to Twilight and sits down on the bed.
"I'm sorry Twilight. Cadance helped me to see more clearly. I love you Twily I should have seen this earlier." Shining said while his face started to turn red. Twilight got up and sit next to her brother was this the moment she had been waiting for.
"I love you too BBBFF." Twilight said and placed her hand on Shinings cheek.
"No." Shining said taking a hold of Twilight's hand which made Twilight's world darken he was going to reject her, but she was surprised by the strong kiss he gave her. After he released their mouths he looked into her eyes.
"It's Shining and Twilight, a future husband and wife. This is what you wanted right?" Shining said slowly starting to move one of his hands down into Twilights pants.
"Yes... Yes, it is." Twilight answered her breath quickening while feeling Shinings hand playing with her clit and pussy.
"Lay down then. I want your first time to be special." Shining said and guided Twilight down onto the bed and helped her to remove her clothes while doing so to his own his cock already hardening.
"We need to get you ready first. Don't worry a think Twilight. Just spread your legs a little and I'll do all the work." Shining said his voice full of love towards her and Twilight did as he told her spreading her legs allowing Shining to have full access to her plot.
Without any warning, Shining dived in using his experience to please Twilight with his tongue licking her pussy and playing with her clit. It wasn't long until Twilight let out her biggest orgasm yet spraying her fluids on Shining's face. Licking his lips and cleaning his face a little Shining looked at Twilight who was panting heavily.
"Was it that good?" Shining asked having a naughty smile on his face.
"It never feels this good when I'm doing it myself." Twilight answered panting heavily after her orgasm. Shining gave a chuckle and moved towards Twilight aligning himself with her entrance.
"I'm going to do this slowly. Just say if you need me to slow down and I will." Shining said care clearly heard in his voice while Twilight took hold of the bed linens squeezing them in both anticipation and fear. Shining pushed himself into Twilight's love canal slowly pushing deeper while Twilight squirmed in pain and pleasure. Without hearing any protests Shining finally hilts his full length into her and stops there looking down to Twilight.
"Everything alright?" Shining asks. Twilight only gives a nod while a single tear rolls down her cheek.
"Alright I start to move now just say if you need me to stop." Shining says and starts to pull back which makes Twilight gasp for air the pleasure starting to strengthen slowly overcoming the pain of her lost virginity. Shining was starting to slowly increase his speed always checking if Twilight was okay with it. It wasn't long until Twilight's pain was completely gone and all he could feel was a pleasure when Shining moved inside her. Wet slaps and creaks of bed legs could be heard in the room where two siblings were making love the scent of Twilight's heat was driving Shining ever harder he was slowly losing himself to his primal side here was a mare that had given herself to him her womb fertile, waiting to be seeded and Shining was more than happy to oblige her. Twilight could feel Shining getting rougher on his thrusts she had lost her count on how many times she had orgasmed during their long lovemaking. It wasn't long until she felt Shining reach deeper into her core and being the academic mare she knew right away that he was trying to penetrate her womb increasing the chance even more that he was the one to breed her. It was inevitable as husband and wife that they would have foals so why not right now. Twilight pulled Shining's head down and started to kiss him while crossing her legs around his waist.
"Shiny, breed me. Give me your foals." Twilight pleaded during their kissing. Asking to be bred made Shining thrust harder than before while Twilight could feel his cock starting to pulsate in her and it wasn't long after that Shining pushed all the way into her womb with one final thrust and his flood gates opened making Twilight reach her biggest orgasm today and releasing his seed into her foal factory drowning it and making Twilights belly to bulge with the amount of fertile seed he but into her. They laid down on the bed not saying a word to each other only looking into each other's eyes while kissing each other one final time before falling asleep holding each other not wanting to let go.
