They say that curiosity killed the cat?
It's a good thing that Rainbow Dash is a pegasus then, when she hears that Pinkie has been sworn to silence by Twilight after hearing yet another secret, she can't help asking about for any loopholes.

It's a simple challenge, all she has to do is spend the day helping Pinkie Pie.
Right?

Many, many thanks to Lostzilla for the cover image. Hopefully this story does it justice.