Princess Luna's Dirty Secret

It was finally Saturday. Derpy hadn't seen Luna for 4 days now, she was a very busy mailmare. She chewed on her muffin while sorting through her own mail, until she came across one from Princess Celestia...

Dear Derpy Hooves,

I'm sorry I didn't invite you over yet! You are my little sister's special somepony and I must meet you. If you aren't busy, could you please care to join Luna and I for lunch at 12:00? It would be a pleasure!

~ Your dearest sister-in-law, Celestia

Derpy gasped at the content of the letter. Princess Celestia, inviting her to a casual lunch?

"Damn!" Derpy giggled, she didn't ever curse but she couldn't hold in her happiness. Never before was a retarded pony ever asked to join Celestia for lunch. That would be ridiculous! But, maybe, Celestia didn't know about Derpy's condition!

"Well, there's no way she will know!" Derpy muttered. She was going to try to make herself look like the most ideal sister-in-law in all of Equestria!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

It was 11:55, and Celestia had a smile on her face as she set the table using her magic. Luna was quite happy, as well. It wasn't everyday her sister was in such a good mood, and today her marefriend was coming too! Celestia would just love the goofy, kind-hearted mare that Derpy was, Luna was sure of it. Suddenly, there was a knock at the castle door. Almost instantly, Luna trotted as fast as she could to the door, hearing Celestia laugh to herself.

"Hello Princess Luna, how do you do?" Derpy asked in a voice, unlike her own goofy one.

"Um, I'm doing fine?" Luna said, raising her eyebrows at Derpy's transformed behavior. Derpy nodded and waited for Luna to ask her to come in.

"Why are you staring at me? Do I have too much makeup on?" Luna asked, twitching at the creepiness. Derpy laughed, not her silly laugh, but a really sexy laugh which Luna had never had heard from her before. It sounded almost like that unicorn, Rarity's laugh.

"What the fuck..?" Luna whispered, slightly annoyed. Derpy just waited, smiling at her marefriend.

"Oh... Sorry, you may come inside," Luna acknowledged the awkwardness. Derpy trotted inside, and Luna couldn't help but stare at the pegasus' sexy flank. Luna was feeling slightly aroused at just the thought of what she wanted to do to Derpy, right now.

The three of them sat down at the grand dining table. Celestia noticed Derpy's warm smile and welcomed her.

"Thank you, Princess," Derpy said as she bowed down. Luna was feeling really annoyed because of that voice, now. Celestia shivered and shook her head.

"NO! Please don't! Look, dear. If we are going to be sisters, you don't need to do that! You practically family now!"

Derpy smiled and nodded her head. Celestia used her magic to place slices of grass and sunflower pizza on each of the plates. Grass and sunflower was Derpy's favourite, though she wondered why royalty ate such low-class pony food.

"You look surprised? What you didn't think we like to save a couple bits? We don't eat gold flakes, you know?" Celestia smirked at the confused mare. Derpy laughed that sexy laugh, again. Luna couldn't hold it in, she just smiled at Derpy and finished her food, quickly. When all three ponies finished, Celestia began asking Derpy some personal questions.

"So Derpy where are you from?"

"Uh, Fillydelphia..."

"That's nice... How's your family?"

"I'm an orphan," Derpy replied, bluntly.

"Oh, I'm sorry..." Celestia stayed quiet for a long while until Luna had to leave the table to go to the little filly's room.

There was so much awkward silence, and Derpy began to notice Celestia staring at her. Celestia gave her a flirty smile and whispered in her ear,

"I want you so bad, right now..."

Derpy swallowed hard, and stuttered as she spoke, using her regular voice, though Celestia didn't notice.

"I..I...I.. uh gotta..."

Celestia ignored Derpy's stuttering and licked her cheek. Derpy was terrified, was she being assualted, right now?

"C'mon, you are so irresistible! Don't you know how hot you are? With your sexy mane and your 'dumb-blonde-ness'?" Celestia moaned which made Derpy shiver.

"Um... Thank you?"

Suddenly, Celestia began licking her face and kissing her all over, from her face to her neck. It didn't feel as good as it did when Luna did it. It just felt plain scary and like she was being raped! Derpy whimpered as the princess began to lick her stomach...

"NO STOP PLEASE!" Derpy cried, tears were spilling out of her eyes. Celestia moaned and licked her near Derpy's most sensitive parts. Only one pony had been there before, and she couldn't help crying as Celestia raped her. She didn't feel the slightest bit aroused, at all. She felt very terrified and disgusted as her so called 'Princess' stuck her tongue inside her.

Derpy's tears wet her entire face, now. She couldn't stop this rapist from doing this to her, and wanted to disappear.

"Why me..?" Derpy whispered through tears. Where was her Luna when she needed her most?