Rainbow Dash has a secret that she's going to show her human friend. After a miss fired spell from Twilight, Dash can now grow and shrink on command with one word. She decided to use this new power for sexy times with her human.

Sex type: Body, butt, and Dick growth. (Obviously) Macro on Micro sex and Pony on Human.

This was just a little book I thought of while skimming Fimfiction. I hope you will enjoy it, and if you have any critique for me, don't hesitate to comment. I am always looking to be a better writer.