Rainbow Dash awoke to the sound of birds chirping. She craned her neck to find the source, only for a sharp pain to shoot down it and into her back. She rubbed her sore neck and moved more slowly.
She was sore all over, her head was killing her, and she smelled like sweat and alcohol. The sun was too bright and the birds' chirping was too loud. Her mane and feathers were a mess. She closed her eyes and set her head back down onto the bed.
The bed felt different, it was lumpy, and she could make out the distinct creaking of metal springs beneath its rough surface. She opened her eyes again and looked at the bed. Just a regular mattress, not her own cloud bed. She shrugged it off, maybe she stayed at a friend's house last night.
Wait, why couldn't she remember anything that happened last night? She sat up quickly, sending another bolt of pain through her body. She ignored it and looked around. Yeah, she definitely stayed at Twilight's. She didn't know why she didn't realize it sooner, she was surrounded by books, and she only owned a few books, plus the obvious fact that she wasn't surrounded by clouds.
It was then she heard a slow breathing next to her. She looked over to see Twilight looking just as bad as she did. She was sleeping soundly, a smile on her face. Rainbow Dash began to put two and two together.
"Oh buck me." She said, not louder than a whisper. She wracked her mind for a clue, anything that would give her a hint to what had happened the night before. Then it hit her, it hit her like a ton of bricks.
Twilight's birthday.
It was a little known fact that Twilight could actually hold her liquor pretty well. She was still drinking with Rainbow and Applejack into the early morning, after that it was fuzzy, Rainbow remember stumbling after Twilight up the stairs, watching as she moved her flank and flared her wings, that seductive look in her eyes...
The sound of Twilight groaning in her sleep snapped Rainbow out of her trance. The rest didn't matter, she figured. She turned over on her stomach and put her head back down, she put one wing over twilight and curled up next to her.
The rest didn't matter.