Rarity's spent her entire life glorifying glitz and glam.
She owns a boutique, enjoys relative success, and is fairly popular. It's the polar opposite of the rest of her family.
Of course regardless of that, she still loves them. Really, she does. Sure, sometimes they can be a little embarrassing, or do something stupid, but its nothing that can't be forgiven... Most of the time.
After all, family is supposed to give love unconditionally. Even if somepony does something terrible.
So when that's the case and Rarity's family starts falling apart, can she become the glue to piece things back together?

Last Warning: Erotica. Gratuitous Sexual depictions to follow.
Originally written for the Unusual Related Bedfellows Contest for Incest is Wincest!