In this Equestria, mares are always taken care of by their stallion owners. They're completely subservient, but they like it that way. They love every minute of it. Sex is public and stallions often share mares, because keeping a mare satisfied is tough, especially since most stallions have to take care of a whole harem.

When Rainbow Dash's little brother, Boomie, comes of age, he's thrown into a whole new world and discovers all of this for himself for the very first time.

Warnings: Public sex, incest, foalcon, group sex, impregnation, master/subordinate sexual relationships, loss of virginity.
This is a commissioned piece for an anonymous Patreon supporter.
Cover image by kryptchild.

Based on this story:
Button's Mares by Typist Gray -- Recommended if you enjoyed this story and want more.
We are not your Mares by iamjohndoe -- Recommended if you were offended by this story and need some catharsis.