Fluttershy comes home from a shopping trip with a few odds and ends, purchased on impulse - and one of her purchases is a fetching pair of pink panties. She tries them on, hoping to give her special somepony White Heart a sexy surprise... but she's the one who ends up getting a surprise.

Once the panties are on, they don't come off... and a cock begins to grow... and grow. When White Heart's best attempts only make things worse, it seems that Fluttershy is going to grow forever.

White Heart can't stop Fluttershy from growing... but he does have a plan to keep them together forever, no matter what.

Contains: Female to Futa TF, Male to Female TF, Cock and Ball Growth, Breast Growth, Cum Inflation

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Cover image is an edited version of derpibooru 1554703