Celestia's guards do terrible things to her. Fetishes happen.

An obvious story about Fluttershy having casual group sex with her animals, and her friends showing a little too much interest in her guilty pleasure as well

Big Macintosh and Fluttershy are put on trial for adultery, and dark, dirty and kinky acts of humiliation ensue as part of their punishment.

A group of beautiful young women from earth are kidnapped by Celestia and made love slaves for Equestria's stallions