Author's Note
To my brother, the most silliest, most awesome party pony there ever was. 
I meant this to be funny, but it turned out really heartfelt and sweet. I'm actually proud of this? Ah, well. Anyway, enjoy! (This was inspired by Maud's one line in "Make New Friends But Keep Discord")
Secretly Funnier
"Hiya!" Pinkie Pie greeted her sister, smiling her trademark over-the-top smiles and popping up out of nowhere at one of her parties.
Since Pinkie's first party that she threw that happened because of what Maud like to call "the Rainbow Connection", Pinkie had thrown more and more parties, each one more extravagant and amazing to Maud as the next. However, it wasn't like "the Rainbow Connection" changed only Pinkie Pie. Oh, no. It had turned Muad's life around also.
What used to be of Maud's simple life that consisted of eating, sleeping, and working on the farm changed in what seemed to be a blink of an eye. Now she was dancing, singing, laughing, and joking along with her sister, Pinkie. They spent hours and hours on end together, and suddenly even work on the rock farm turned into a game.
Maud's thoughts lingered for a moment on memories of the happiest times in her life that she had shared with her sister and smiled to herself silently, realizing that Pinkie had just said something, and shook her head to bring herself back to earth. "How's it going, Pinkie?" she said after she was fully awakened from her thoughts.
Pinkie frowned just the slightest bit and looked Maud up and down before saying softly, her face looking oddly confused, "I'm super-duper, but you don't seem to be having fun."
"I'm fine...really." Maud answered, quite truthfully, smiling to show that she really was fine.
Pinkie Pie's frown deepened thoughtfully before she perked back up and smiled bigger than ever, even jumping a little. "I know! A secret will make you feel better!"
Maud Pie was a generally truthful pony that didn't exactly like secrets. She knew that they eroded friendships until they eventually broke apart, even the ones that were as solid as rock, but that didn't stop her from wanting to listen for Pinkie. It also didn't change the fact that Maud was the best actress she knew, even if she technically didn't know any real actresses or actors personally. "Secret? What secret?!" Maud cried excitedly, perking up at Pinkie Pie's words.
Pinkie looked around at her other family members that were talking, smiling, and dancing to the music like anypony at a party should to make sure that they weren't eavesdropping on the conversation. They weren't, so Pinkie Pie turned back to Maud and covered one side of her mouth with a hoof seriously so that she could whisper to Maud, "Not here! Somepony could overhear us! Let's go outside!"
Maud nodded. "Right!"
The two sisters started trotting out of the room before their mother called out to them, "Where are you going? It's almost bedtime, no matter how fun your parties are, Pinkie."
"Just outside for a minute! I have to tell Maud something!" Pinkie exclaimed, smiling back at her mother.
"Well, okay, but be back before the sun completely sets!" their mother permitted.
"Will do!" Maud called back to her mother as the two ponies trotted out of the door.
The sisters trotted a little bit out into the rock farm until they came across a particularly large rock that was big enough for them both to hide behind. Once they crouched behind it, they settled themselves as comfortably as they could, given the circumstances.
"Okay! Tell me!" Maud Pie demanded excidedly.
Pinkie let loose another one of her grins, and Maud couldn't help doing the same thing. After a few seconds of this, Pinkie answered, her smile adding a little seriousness to the hilarity of a funny face she was making. "Well, do you ever get the feeling you're being watched?"
"Yeah. All the time."
"I know it sounds crazy, but we actually are! It's not just my imagination either. I know they are out there! They might even be watching us right NOW!" Pinkie said passionately. The wind blew her mane and tail as she closed her eyes, emphasising the next words she said, "I can feel it in my heart. I can feel it in my soul. And sometimes, like on the day we saw the "Rainbow Connection", I saw them in my dreams that night. Griffins, humans, earth ponies, unicorns, pegisai, and alicorns. They were all there. It was like they were a part of-" Pinkie Pie opened her eyes suddenly as she felt the small tap of Maud boping her nose.
"I believe you." Maud smiled back at Pinkie Pie, before looking around and noticing the sun had almost completely set. "Come on, better get going."
Pinkie Pie nodded and the two sisters walked back together to the barn.
Years after Pinkie had first described what they came to know as "the fourth wall". Maud had spent years attempting to get people, or ponies on the other side of the "the fourth wall" to like her, or at least trying to see what they generally liked. She spent so much time studying, that she had to shut the pony she cared for the most in the entire world, in order to eventually prove herself to Pinkie.
All that studying had paid off, and Maud knew it was time to show Pinkie what she had learned. She was going to be as dull and lifeless as possible, and maybe, just maybe, Maud could please "the fourth wall" more than her sister.
So Maud Pie wrote a letter to Pinkie telling her she was coming, packed her things, and set out for Ponyville. When she got there, she hugged Pinkie Pie,"I figured it out. I figured out how to prove to you that jokes, as long as we're both telling them, are my favorite."
After that, Maud explained everything to her sister and the two came up with a plan and caught up with each other while they walk toward where they knew the rest of Pinkie Pie's friends were, thanks to their friends on the other side of "the fourth wall". Suddenly, Maud realized that she was no longer secretly funny. It felt good. It felt great.
