Cadance has a special Hearth's Warming gift for her and her husband, Shining Armor. When the pair are invited to a holiday party held at the Castle of Friendship and Cadance forgets something at home, Cadance decides to share her gift with everypony.
Is Cadence still pregnant in this?
6795488 Yes. Hasn't really come into play yet, but it will in the next chapter.
Heh, of course everything's a game for Pinkie.