Surprising Surprise Party

A big night for Fluttershy and Pinkie Pie. Will the Party Pony make light of such an intimate moment?

Fluttershy and Pinkie Pie have decided that tonight is the night to take their relationship to the next level with their first night of intimacy. Fluttershy believes she is ready, until the Party Pony of Ponyville starts getting supplies of a less-than-intimate nature. What exactly is Pinkie Pie planning?