Twilight was invited by Princess Celestia for a relaxing get together at the royal spas. To the faithful student's surprise however, her teacher had something unexpected planned for her:

A new learning curriculum, and a side to Celestia that Twilight never could have expected. Ever the diligent student, Twilight will find a way to learn everything she can from her favorite teacher and hopefully have fun too.

Art by JohnJoseco (can't link it here cause NSFW)

Contains: Casual Nudity, Frank Sex Talk, Size Difference, Body Worship, Body Insecurity, Consensual Groping, Fingering, Booty Shaking, and Big Boobs. I mean some serious Honkers, a real set of Badonkers