Celestia straddled Luna, her younger sister pinned under her hooves, which she didn't seem to mind. Her body pressed on their pillow. Nothing else mattered for the two royal sisters but the love they shared. Without warning, Celestia gave Luna a peck on the lips, like she had done many times before.
Luna returned the favor in kind. She closed her eyes and deepened the kiss, placing her hooves around the older alicorn's back. Celestia tilted her head as she melted into the embrace, and the two remained still, savoring each other's taste.
It was only a short kiss, but enough to excite the princesses. Celestia giggled, "Do you want me to continue, sister?"
"Yes." agreed Luna.
Celestia giggled and planted her mouth onto her sister's, kissing her again. What started off as a chaste kiss, became a deeper embrace as theit tongues touched and danced in their mouths. The two alicorns moaned, noticing the drool trail hanging from their tongues as they parted once more.
And it was then Celestia kissed her sister's collarbone, her lips pecking her chest, her body. The feeling of her older sister's lips around her body sent tingles down Luna's spine, never fighting back. She let out a quiet squeak, feeling her sister lick her fur a little in a teasing manner, which the Sun Princess sneaked in to get a reaction.
Finally, Celestia found herself between Luna's legs. The younger princess bit her lip, feeling her older sister's tongue pleasure her.
Moans were heard, the bed squeaked, and the scent of what they did lingered even as they finished. But this was a moment neither princess regretted throughout their lengthy lifetimes.
The Princess of the Sun sighed, the memory still fresh in her mind. As if it happened yesterday. But it wasn't. One thousand years have passed since her and Luna interacted like that. Here she was, wondering if they could continue. If they even should.
'I shouldn't even think of my sister like this. A thousand years alone has given me time to think about it... Yet, I love Luna too much to think otherwise.' thought Celestia.
Here she was, about to enter her sister's quarters, about to begin a discussion that she wondered was even worth it. 'Would she still feel the same way?' she closed her eyes and exhaled, 'Has she even thought about it like I did? Perhaps I shall find out now.'
Composing herself, the alicorn opened the door into her sister's room, noticing her younger sister sitting on her desk, engrossed in paperwork again. "Sister..."
Hearing Celestia, Luna raised her head and replied, "Celly! What are thou doing in my quarters?"
Celestia smiled upon hearing her sister's dialect, "May we speak with each other for a few moments? It's about something... important." she wondered.
"Of course." Luna agreed. The two sat on Luna's bed, and Celestia lowered her gaze, unable to speak for a few moments, "What do you wish to talk about, sister?"
The Princess of the Sun sighed again, "Lulu... I wish to talk about... us." she revealed, catching the Moon Princess' attention, judging by how her eyes widened, "About our bond all those centuries ago."
"...What of it?" Luna asked, "Does thou regret what we did together?"
Celestia shook her head, "N-No, and that's just it. I didn't, and my feelings for you haven't changed."
Luna put a hoof on her chin, "Even when I was banished?"
Nodding, the older sister continued, "Yes. I had thought of it. Suitors tried to pursuit me, I have even pursuited a few romances of my own, Lulu. But they meant nothing compared to what we had."
Luna tilted her head, wondering what she meant, "Is it because of thy lifespan?"
"Yes, Luna... It partially is." Celestia answered after some thinking, "But it is more than that. In the relationships I attempted during your banishment, I did not feel the same spark as I did with you. I could not recreate the bond that we shared."
The Princess of the Moon asked, "Why...? Why have thou come to me about this now?"
Celestia lightly chuckled and held her sister's hoof, "Why? Lulu, you are the sweetest mare I have ever laid eyes on... Even after you fell to the darkness of Nightmare Moon, I have never stopped loving you. When you returned to us, I only realized it grew. And lately, the thought of what we once had came into my head. I was wondering if you wished to deepen the bond we shared..."
Luna pursed her lips in response and finally asked one question lingering in her head, "If you had regretted it... Why have thou attempted to pursue other romances?"
"Because if our subjects were to find out what we had, what we could have again, there would be tabloids, papparazzi, political drama over it." Celestra finally revealed, "I am sorry, sister... But if the public were to discover our illicit love, our lives would be in turmoil." she explained in a calm tone. "I did it to protect your reputation, Lulu. Not mine." she added with a frown.
Luna blinked, "...Thy image?"
The Princess of the Sun paused then continued, "If I hadn't done so and ignored any suitors moreso than usual and dismissed any romance, our subjects would have probably connected the dots even if it were to just be a tabloid theory, and your reputation was already low because of your banishment as Nightmare Moon. I did all I could to assure my subjects that you were the best sister and co-ruler for all of Equestria. Even tempting to pursue some suitors if it meant protecting your image." she revealed.
Her younger sister looked to the ground, "Celly, I had no idea you cared so much for me during those years."
The older alicorn smiled, "Of course I did, Lulu. You are my sister, and perhaps something more... I do not care if it is taboo then or now, I love you too much to regret what we did. I never want to lose you again." she finished saying.
Hearing those words, Luna closed the distance she and her sister shared, much to Celestia's surprise. Not that she seemed to mind of course. The two hugged, remaining still sitting on the bed. For Celestia, she had felt as though years of thoughts, pressure, and confusion faded away right as Luna kissed her. Her eyes closed, melting into the kiss she had been waiting an eternity for from the mare she loves.
A soft smooch was heard as they separated, Luna still holding her sister's hoof, pressing it to chest, a faint blush evident on her muzzle. "I have never stopped loving you, Celly..." she finally revealed to the older alicorn, "Even when I was under the influence of Nightmare Moon. When I returned, my love for thou has only grown... And I may wish to pursue what we had as well."
Celestia's heart fluttered upon hearing Luna's acceptance. "Oh, Luna..." she cooed. It felt as thou as huge weight was lifted off her shoulders. The older alicorn embraced her younger sister for another moment of passion, licking Luna's lips in a teasing manner. She could hear a faint giggle from the Moon Princess as she opened her mouth, welcoming her sister's wet appendage. The two muscles fought for dominance, and for the two sisters it was like nothing changed.
The royal sisters pushed each other into lying down on the bed, never breaking their deep kiss in the meanwhile. Tongues danced an old dance, spit was swapped and the two alicorns couldn't be happier. More giggles could be heard from the two as their bodies lightly bounced on the plush surface.
Finally, the alicorns separated, Luna nuzzling her head on her older sister's chest. "I love you, sister."
Celestia smiled softly, pecking her sister's forehead, "I love you too, Lulu." she then leaned her head into Luna's ear, "Do you wish to do what we did all those years ago?" she purred, licking the blue alicorn's ear, earning a soft yelp from the younger sister, stroking a hoof through her astral-like mane.
Luna smirked, "Of course, Celly."
A few moments later, Celestia and Luna embraced each other again, legs spread out as they pushed their bodies against each other. More moans heard from the two of them, continuing to share the love they once thought to have lost.