The wind rushed into the room through the open window.  Rain found its way in, too, and the tree that came through the window made nothing easier.  

"We're going to have to work together if we want to do this!" yelled Twilight over the wind.  There was no response.  Twilight looked around the room, but neither Applejack nor Rarity were there.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

"Haha Twilight will never know!" said Applejack, galloping through the rain.  Rarity followed close behind.

"I hope Twilight doesn't find out that I'm using Spike's bed as an umbrella," said Rarity, Spike's bed floating above her head.

They galloped into Rarity's home where they shook off all the rain.  Then they proceeded to have their own sleepover.  And nothing sexual happened.