The princess of the night slowly crawled back to the headboard of the bed as Celestia glared daggers at her from across the room. Luna was smaller than Celestia, but the gaze made her feel even smaller. The room fell silent as Celestia slowly walked into the room. Luna wished that she could just teleport out, but she knew that Celestia would just follow her.

“Sister, what do I owe the honor of your visit?” Luna’s eyes darted around the room trying her best not to look right at her older sister. She could feel new sweat dripping down her coat, as she felt Celestia’s glare burning its way into her.

“I’ve seen Twilight in here before you teleported her back to her room in Ponyville. Now will you tell me why she was here, or will you lie to me?” Celestia’s voice was calm, and it kinda chilled Luna to her core. Celestia took a seat at the foot of the bed and looked away from her.

“I had Twilight was here for some special lessons. She is a very fast learner just as you have told me before.” Luna could feel her cheeks turning bright red as the memory was so very fresh in her mind. Luna looked back to Celestia, and the blood went from rushing to her cheeks to gushing out of her nose as Celestia was still in a sitting position, but was turned and leaning on one elbow. This gave Luna a wonderful view of Celestia’s breast that was visible from the top of her dress.

“I see. May I ask what lesson you were teaching my dear little student Twilight?” Celestia’s voice was low, and if Luna wasn’t mistaken, lustful. Her eyes had a hunger in them.

“J-just a few new spells that is all. And why are you looking at me like that, sister?” Luna tried backing up more, but she remembered that the headboard was still blocking her path. So she tried moving up the headboard, but it was too late.

Celestia had moved up the bed and was now sitting in Luna’s lap with a warm smile on her lips. “I think it might have been more than just spells Twilight was learning from you, my dear little sister. I thought you remembered to put up a silence spell before doing any of those kind of activities.”

“W-why would a silence spell be needed?” She didn’t think that she and Twilight were that loud. Celestia just sighed and placed her head on Luna’s chest.

“I so wanted to be her first, but my little sister had to be the one who took that away from me. What a shame. I guess I’m going to have punish you for doing that. But what can I do to punish my dear sister?” Luna look down at Celestia with a scared look. What was her sister going to do to her? This wasn’t good, Celestia was like this with anyone she had sex with. She would act so cool and calm as she would think aloud.

Luna eyes grew wide as it dawned on her. She had a rough idea what punishment was laying in wait for her. “Please sister. Reconsider this course of action. I didn’t mean to let you miss out on your fun with Twilight. I’m sure she wouldn’t mind taking my place.” Celestia looked up and grinned.

“That is not a bad idea my sweet sister. I think she would enjoy being here as well.” Celestia closed her eyes and her horn started to glow. So there was a large flash of light and a loud thud as somepony hit the floor. “Welcome back, Twilight.”

“Princess, what am I doing here. I was sound asleep.” Twilight looked away from Celestia and started to sweat more.

“You are just as bad of a liar as your friend Applejack. I’ve seen you in here before miss thief took what I was looking forward to do with you.” Twilight blinked as she finally looked up and saw Celestia sitting in a way that caused her wings to pop open. Celestia giggled and motioned for her to join them on the bed.

Twilight’s body slowly started to shake as she moved to the bed. Luna looked at Twilight and felt like her heart was about to give out from her sister acting all sexy and Twilight looking sexy and cute. She let out a meep as Celestia gave a little wiggle in her lap.

“Sister what is she doing here?” Her cheeks were no longer the shade of midnight blue but a bright red. Twilight was now sitting at the foot of the bed, looking at them with a worried look. Celestia smiled and slowly got off Luna’s lap and then off the bed to give them a look over.

“Why not? I have a lesson I think she might like to learn.” Celestia’s horn flashed and Twilight meeped as she was now in her bra and panties. “Now that is a much better look for you.” Twilight folded her arms to tried and hide her breast.

Luna looked over to Twilight and felt like she was about to faint. Never had she thought something like this would happen in her very long life. Having the very sexy Twilight Sparkle back in her room and now have her older sister planning something that might be good in the end.

“Princess, what kind of lesson?” Twilight had jumped to her knees and reached her hands toward Celestia. Her tail, to amusement of the two princesses, started to waggle a bit. Celestia giggled, while Luna smiled at Twilight’s excitement. “Please tell me Princess.”

“I don’t know, Twilight. You don’t seem like a faithful student anymore. And that kind of breaks my heart.” Celestia gave Twilight sad look, her lower lip puffed out, and she made a little whimpering sounds.

“I’m sorry! I’m sorry! Please forgive me, Princess!” Twilight looked like she was in tears over making her mentor sad for any reason. “I will do whatever you want.” Celestia’s face did a one-eighty as she grinned.

“Are you sure about that, Twilight?” Twilight nodded her head feverly. Celestia placed a hand under Twilight’s snout as she leant in and gave Twilight a gentle kiss on the lips. “I’m glad to hear that.” Celestia slowly backed away as her horn started to glow and her clothes slowly faded away and left her standing nude in front of them.

Luna could feel her body heating up, and it was really building up in one area of her body. Her hand slowly slid down her body into her panties and she could feel a wet spot. Was she really getting turned on by her sister and Twilight?

As a little moan escaped from Luna, there was a flash of light and Luna found herself now laying in the middle of the bed with both her hands and feet tied to all four corners of bed. Twilight’s wings twisted from seeing Celestia’s flawlessly shaped body. Her breast were the perfect size, not too big and not too small. They formed beautiful tear drop shapes. Celestia’s body had the curves in all the right places.

Feel something wet touching one of her feet, she looked back and saw Luna tied to the bed, and her wet pussy rubbing up next to her feet. Twilight could feel herself getting turned on and something wet formed in her panties. Celestia looked over what is before her and smiled. “I like this setup, but I will need to do a few more things before the real fun can begin.”

Celestia sighed as both Twilight and Luna felt a cool night air of the room touch parts of their bodies that once was covered by their bra and panties. Twilight eyes started to look down Celestia’s body as the princess pointed down. Her eyes grew wide when she had found something that you normally don’t find on a mare.

Twilight found herself face to face with a stallion’s cock. She looked back up at Celestia to see her grinning from ear to ear. “I hope you like it, Twilight. It’s a nice little spell I found.” Twilight didn’t know what to do. She had seen pictures of these things and seen a few videos. Celestia give a little spin of her finger.

“I would like to see that horn bit Luna did with you, but I think you should do it to her.” Twilight looked back to Luna as one of her hands wandered up to her horn and gave it a light rub. A few thoughts ran through her head. Would Luna like to have her horn inside her? And would her horn be enough to pleasure her?

Not wishing to make the Princess sad or upset, she did what she was told and slowly lowered her head so that her horn was in line with Luna’s pussy. She was hesitating putting her horn in, that was till she pushed into her and caused her to push her horn into Luna. Celestia, Luna, and Twilight let out a loud moan.

Luna looked down to see Twilight had her head deep into her crotch, and she could feel that all of her horn was inside of her. Celestia smiled as she slowly pulled out of Twilight and Luna could feel Twilight’s horn slide out. Twilight was gasping for air as Celestia’s cock was slowly being pulled out of her pussy.

Celestia gave a shudder and lightly rubbed Twilight’s ass. She pulled out till only the tip still remained in. It felt so firm, and yet so soft. She let out a grunt as she pushed in hard into Twilight, grinning hearing Luna let out another loud moan. Celestia slowly picked up speed and heard Twilight’s moans growing louder and faster. Luna was moving her hips on Twilight’s horn and moaned as she felt herself getting ready to come.

Twilight cried out as her horn shot an unknown spell into Luna. Luna cried out as she couldn’t hold it in anymore. She moaned as her hips started to buck on hard on Twilight’s horn as she came on it. Celestia wasn’t that far behind Luna. She pushed as far as she could into Twilight and moaned as she shot load after load of hot cum into her.

Celestia still tried to catch her breath as the room filled with a bright flash of white light and Luna and Twilight found themselves laying on either side of Celestia. Twilight and Luna cuddled into Celestia’s side still breathing heavily. “I think my lesson was a little better, don’t you two agree?” The other two ponies nodded and slowly fell asleep after all the fun that happened in one night. Celestia didn’t last long after them.

Five Months Later

Celestia sighed as the ringing of a bell hit her ears yet again. She came rushing into a private chamber that was setup for two new mothers to be. Opening the door showed Twilight rubbing her new grown belly. Luna was next to her, one hand rubbing her also growing belly and while the other hand was ringing a bell.

“Did my sweet little sister ring?” Luna nodded and smiled. Twilight just giggled and slowly got up and waddled over to Celestia and gave her a hug to the best of her ability.

“She did my love. We ran out of juice, and I was getting very lonely without you.” Twilight nuzzled Celestia and smiled happily. Celestia smiled and gently kissed Twilight on the forehead.

“I know my sweet, Twilight. I still can’t believe that little lesson has lead to this,” She gave Twilight a light kiss on the lips. “But I think I couldn’t be any happier with the outcome.” Luna was on the other side of Twilight and smiled happily.

“I agree with you dear sister. I love the outcome, so much fun.”

Author's Note

I would like to thank Fantasia Archsage and TheShadow for taking time out of their day to help me get this little gift ready before Hearts Warming Eve. I hope everypony enjoys this little extra lesson from sun butt herself.