Talk:The One Where Pinkie Pie Knows/@comment-24846719-20151017150744

I think we all know what it is, but let's recap.

Pinkie Pie is the only one of the Mane Six that we've seen to have actually taken care babies and lives with the ponies who have those babies.

Pinkie Pie is also obsessed with keeping secrets as shown in Green Isn't Your Color where she kept telling Twilight that if she reveals a secret she'll lose her friendships.

Pinkie Pie also has a big mouth, especially when she gets excited so it might be hard for her to keep as secret this exciting.

Cadence and Shining Armor aren't immortal like Luna and Celestia so somepony's going to have to run the Crystal Empire someday.