My Little Pony: Friendship is Magic - Cadence's Secret

Cadance is preggo and Shiny is fucked. That is all you need to know.

What is going on in this comic? Why is Shining's eye weird-looking in on of the panels? What is Candace and Shining talking about?! Why isn't the source giving me any explanation?! Why? What? Why? WHAT? WHY? WHAT? WHY? WHAT? FFFFFF*******CK!