A strange pink dinosaur has appeared in Ponyville, and while Twilight is housing the gentle foreign creature, Thunderlane can't get his mind off it's massive mouthole. You can guess what happens here. After witnessing the blowjobs she has to offer, Twilight gives herself some proper equipment so she can get a piece of the action.

Clopfic. Fetish Fuel. Crossover. Futa transformation and sex later in the story. Simple plot to get things rolling. If you're here for anything but weird clop and dick-suckery you've come to the wrong place.

Birdo is a character from the Super Mario games.
If you aren't familiar with her, you might want to glance at the Wikipedia page.

Cover image sources:
Thunderlane image
Birdo image