Son of the Sun

...Princess Celestia, I'm scared.

What scares you, my brave pony?

...Myself.

Princess Celestia held up Nick in her hooves, cooing at him as she smirked, "Aww, how adorable you are. Why, I could just eat you up! You are small enough to do so, littler little pony."

Nick was currently trying to keep his thoughts going...for once.

Why is the princess acting like this?

From the time I've known her, she's always been kind. Never once...hit me. What happened? Did I do something wrong?

Princess Celestia detailed for him how he'd be able to get one year older by tomorrow, "Okay, Nicky. You must do several things to get a 'birthday', which means one extra year added to your age. Firstly, call me mommy."

She then sat him in her lap as she instructed a maid to bring her a drink, which was quickly poured, brought, then placed before the princess.

Celestia took a swig of wine, then told him to do so whenever he felt ready.

Nick decided to get this over with, otherwise he'd be stuck in this diaper for longer than tolerable.

Saddened by the feeling of disowning his one and only parent, Nick babbled out with a tear, "Mama Cewwy?"

Celestia grinned with the same expression as a thief pocketing a golden watch undetected, "Heh. That's my colt. I'd suggest you get used to calling me that. I must hear a variation of that when you speak of your mother from now on. Because that's what I am. Correct?"

Nick didn't think he'd survive a backhoof at this age, so he just laid down on her tucked backlegs, whimpering.

Celestia wiped some wine off her muzzle before exclaiming, "Hello?! I've yet to hear any confirmation! Or, are you being a bad colt? You can imagine what happens to bad little colts who disrespect their elders, can't you?"

He nodded meekly, breathing in a heavy sigh.

She drank more alcohol, delivering a toast at his submission, "Right! Had better!"

She requested to be topped off with more of her beverage, soon replenishing the hearty amount she'd downed within minutes.

Then, returned to her demands, "You, dear child, will also accept a name change. I hereby decree your new name as...Kin. It's short for Kindle. For you will be that of a great flame. A passionate burn."

Nick's eyes shot open at this injustice.

My name?

N-no. No, it is my name!

...She can't take it from me.

...

Can she?

Nick sat up, openly crying as he stared into the eyes of his ruler.

Luna could be seen sitting cozily on a pillow, basking in the pleasure of a nightmare realized, "How interesting."

She demanded a butler fetch her some pop-it-corn.

Celestia smooched at the child in the air, asking as if unsure why he wept, "Aww, poor baby. What's the matter? Kindle? Kin? What's got my baby upset, huh? Mommy would love to know."

Nick couldn't take it, shrieking out in a toddler's voice, "Na Kin! Num Nicky! N-nicky...Mama Cewwy."

His hope she'd be lenient on him since he called her his mother was dashed, seeing as she placed a hoof above his head, the shadow it cast menacing. It completely enveloped his shaking form.

...

She brought it down...to softly pet his mane, which the child did not see as he cowered in terror.

"Mommy Cewwy," were his only rambles as he choked back saliva and sweat that pooled on his face uncontrollably.

She awaited the colt's return to his senses, making her voice soft and sweet, "What's wrong, sweetheart? Are you okay? Did somepony scare you?"

Bringing him onto her shoulder, she pat his back as he shuddered, diaper rustling as he was lightly bounced as well.

Celestia told him with motherly authority, "Better? Good, my sweet baby. Now, you and I need to come to an agreement. You are now Kindle. Or, Kin. Whichever suits your fancy. In exchange..."

The solar princess positioned him in her hooves that he may gaze up at her brilliantly glowing eyes, filled with love in this moment.

Her words were a whisper, yet read loud and clear by the foal she carried, "...Your long-lost twin will be restored."

Luna heard what was said, smiling at the scene before her.

Nick didn't say anything. He stared.

Stared into the eyes of the mare who promised him such a desire he thought impossible to achieve.

Celestia's lips drew to the sides of her cheeks as she let tumble from her mouth, "Now, tell Mother your name."

Nick thought on this proposal.

To deny his mother by accepting this one? To disown his very name? To place his trust in somepony who he was now...unsure of?

All for him.

Nick splattered drool on himself as he dribbled out, "Kwindle. Num Kwin. You Mama Cewwy. Bot mine."

Celestia's eyes twinkled, laughing slightly as she held up a...momentarily obedient foal of her own, "Hahahaha! Yes you are! You most certainly are. All mine."