Pinkie Pie had told the Cakes babies many stories. She told them about that time she and her friends were chased by an angry hydra, about the time they prevented a war between buffaloes and ponies and about that time she spilled hot sauce over Rarity's mane, forcing her to cut it and wear a wig for a few days and she totally shouldnt have told them that since Pinkie Promise never tell anypony; but their favourite story was the one when she met her best friends and they defeated Nightmare Moon. They loved that story and she told it to them dozens of times.

So when a tall, black alicorn with a flowing blue mane entered their bedroom, their reaction of jumping over her, biting on her legs and face was pretty understandable.

“My stars!”

“No children, no! Don't bite other ponies! Why did you do that?” Pinkie asked them.

Since they couldn't talk yet, Pound and Pumpkin went for a visual medium. She jumped atop her brother to draw the illusion of a winged unicorn and they made scary noises. Luna didn't quite understood what they meant but charades was one of the many talents of Pinkie.

“Oh no no no, she isn´t Nightmare Moon! She is Princess Luna! And she is a very special somepony for me,” she explained.

Pound and Pumpkin looked confused.

“You know, special like “Mommy-and-Daddy-doing-smoochy-woopy-in-the-kitchen” special?”

Pumpkin giggled while Pound made a “gag” face.

“So no more biting or punching or making faces at her back, understood?”

Both babies nodded.

“Pinkamena, perhaps it will be better if I stay at the kitchen...”

“Don't be a silly-filly, my loony-woony! I´m sure the babies will love you! Just keep them entertained while I take care of the store for about an hour, oki doki?” Pinkie Pie said.

“Understood,” Luna replied but then noticed Pinkie´s look. “Umh oki doki loki?”

Pinkie smiled and gave her a quick kiss on the nose, causing the babies to repeat their previous reaction. Once Pinkie was gone, Luna realized the babies were staring at her.

“Younglings, would you like to participate in some games?” she asked, pulling a deck of cards with her magic.

The babies crossed their arms.

“How about singing? Oh the mounts of Equestria stand tall!!”

The babies covered their ears, begging for her to stop.

“Very well then.” Luna took a moment to ponder. remembering her previous experience in town she invoked her magic, making herself taller and scarier. “Perhaps you will prefer me like...THIS!”

Predictable, the babies reaction was to cry.

“Oh no no, younglings! That wasn't my intention!”

“Is everything okay up there, moonpie?” a voice asked from downstairs.

“Everything is perfect. No need to climb upstairs. Please, stop crying. Look look, who am I?” Luna said, pulling a flour sack out of nowhere and dumping the content on her, turning her whole coat white. “Dearest Twilight!”

This made the babies but not because they found it funny but because they were utterly confused.

“I suppose imitation isn't one of my talents...”

*****

A few minutes later while Luna cleaned the mess she had made, the babies plotted how to defeat the evil Nightmare Moon. Even with each other they needed to retort to charades so Pumpkin was making all sort of gestures to explain her plan to her brother while Pound simply suggested punching the Princess. Pumpkin made a series of elaborates sings, that basically told that she would distract Luna, Pound will blind her, they would both throw her over their crib and then Pound suggested punching the Princess in the face. Pumpkin´s reaction was to slap her own face.

Despite the communication problems, they carried over with the plan. Pound flied over a drawer while Pumpkin approached Luna, a squeaky toy on her mouth.

“Oh, what a lovely toy. Is it a...chicken?”

With Luna distracted, Pumpkin made the sign and the young pegasus jumped over the Princess. He covered her eyes, trying to bring her down.

“I do not understand the purpose of this game...”

Pumpkin came to help her brother, magically throwing all her toys while Pound pulled Luna´s mane.

“Please children...this is getting a little...please stop...I said...ENOUGH!”

The Royal Canterlot Voice did the trick, causing both twins to stop and freeze. Luna took them back to their crib and looked at them with a sad and disappointed eyes.

“I´m sorry,” she suddenly said.

Pound and Pumpkin were confused by this reaction.

“I know why you act like this. Since you were born you have been told stories about the evil Nightmare Moon, about how she sneaks at night to gobble little ponies. I know you're afraid of me and I know you're afraid I might hurt your beloved caretaker. But my heart belongs to Pinkamena and I assure you I will never do anything to hurt her. She is the only pony that looks at me without fear on her eyes. Even my own sister has the memory of my betrayal. But Pinkamena, Pinkie...she simply smiles when she looks at me. She smiles and tells me she loves me very much. And I love her as well. I love her.”

Luna went silent after that confession. The twins looked at each other and smiling, they jumped over to Luna, only this time they just gave her a tender hug. Luna smiled and returned the gesture.

****

“Well, that was the last customer of the day. How are things here?”

Pinkie looked inside and found the babies asleep under Luna´s wings, who was also softly snoring. Smiling, she put a blanket over the three.

“Sleep well, my sweeties.”

Pinkie turned the lights off and let the three ponies alone, playing in their dreams.

(Daw, I think this is sappy even for me ^^ )