Greta and Gilda have unearthed artifacts of great power: two collars that supposedly possess the power to control the mind of any creature, no matter how powerful.

So they go for broke, seeking out the two most powerful entities they know of. At a gala in Canterlot, they each wrap the collars around their targets - and sure enough, Celestia and Luna fall under their control. Now, with the help of cock-growth potions, the griffons are in for a night of fun...

Contains: Mind Control (Rape), Female to Futa transformation, Female on Futa, Breast Play

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Cover image is derpibooru 1575524, used without permission.