Dusk Shine and Glimmer Shield; these are names that appear on no official registry, no official papers... but the ponies that own those names would look strange familiar to many.

Love, lust and sex are driving forces behind many creatures, and for Twilight Sparkle and her brother Shining Armor, all three are no stranger. With Twilight capable of hiding her true self, and her talented brother much the same, their secret, passionate unions have gone unnoticed for years. Or have they?