Fluttershy has always believed one thing. No matter what, cat ponies and dog ponies can't get along. But when she found out that Rarity and Applejack were dating, she was surprised.

So you can imagine her reaction when she heard they were getting married.

A few years later, Rarity and Fluttershy meet once a week at the spa to discuss their wives and other things.

Fluttershy still has one question on her mind.