Disobedience in Ponyville

Pinkie Pie burst into Twilights library squealing with excitement. What was a quiet and relaxing morning in Ponyville was shattered by the shouting of the obviously thrilled pink pony and the noise of hundreds of books falling off the shelves.
"TWILIGHT! HEY TWILIGHT!" she shrieked, waving around an envelope she had in her hooves. Twilight, who was walking down the stairs at the time, was startled and fell to the ground with a thud, she got up while Spike instantly started cleaning the mess.

"Pinkie! What do you want? I could've broken my hoof!" she yelled.

"Couldn't you just fly?" Pinkie asked innocently, Twilight looked at her wings and turned back blushing.

"Oh yeah, sorry Pinkie. It's taking me awhile to get used to all this." she said flapping her wings sheepishly.

"No problem! Oh yeah, guess what though? You know some ponies are coming over from Trottingham school for a week or two, and people need to volunteer to look after two of them? Well I volunteered to be one of those ponies and its my cousin and her best friend who are staying with me and the cakes! Isn't that great Twilight?!" Pinkie said at a speed that could only just be understood by anypony.

"That's great Pinkie! I didn't know you had any cousins, I can't wait to meet her." Twilight said calmly. "Say, I volunteered to accommodate a pair of students as well. I wonder when I'll find out who it-" she started before an envelope was slipped through the front door. "Oh! I wonder if that's it." she went over and levitated the letter from the floor.

"Wait... you're looking after some ponies as well? I thought you'd be too busy doing stupid, smart, important, princessy stuff." Pinkie said.

"Just because I'm a princess doesn't mean I shouldn't do my part for the community...hang on a minute... did you just call my work stupid?" Twilight asked slowly.

"No I didn't mean it like that, anyways who have you got Twilight?" Pinkie said, desperately trying to read Twilights letter.

"Oh, just a young pegasus called Starry and a unicorn called Techie Sweet, they both are reasonably smart but both at different subjects. Maybe I could help them learn some things while they're here..." Twilight read out before trailing off in thought.

"That's cool Twilight! Anyway, I have to go now. I'm planning a party for when they get here and those cakes and decorations aren't gonna make themselves are they!" Pinkie giggled as she bounced out into the street and almost bounced into a large stallion. "Whoops! Sorry, didn't see you there!" Twilight watched, smiling and shook her head.

"Oh Pinkie Pie!" she laughed to herself.