Warning: Contains certain fetishes such as Cum Inflation, Three-somes, Futa, and possibly other things. Reader discretion is advised.

Celestia and Luna have had a lot of fun together now that Luna has came out of the closet about her new feature. The only question is, who else should they share it with? The two princesses call Twilight Sparkle to Canterlot to give her a special task that only (Literally anyone really...) she can accomplish. What better present for Hearts and Hooves day than a bonding experience between mentor and student... and mentor's sister.