Something in common after all.

Rarity and Rainbow Dash crept cautiously into the secret passage. A long, dark, narrow, passage lay ahead.

"Wait!" Rainbow Dash held her hoof out to stop Rarity and then gestured with her head further up the passage.

The glow of lanterns in the distance faintly revealed two mares, an earth pony and a pegasus covered in dark ninja-like shrouding, headed their way. The covert duo strained their eyes ahead and noticed Rainbow Dash and Rarity and started galloping in the opposite direction.

"Not this time!" Rainbow Dash shouted as she took flight darted down the narrow passage in their direction, the walls of the passage just a hair's width from her wings. Rarity took off with a gallop of her own.

The shrouded mares disappeared into the glow of dawn at an exit at the opposite end. Rainbow Dash soon followed. They were long gone by the time Rarity reached the exit. The pegasus unfolded a pair of yellow wings from beneath her shroud and took to the air but Rainbow Dash streaked toward her, closing the distance rapidly.

Rarity's jaw dropped as she strained her eyes against the dawn's early light. The passage exited out to a field near Sweet Apple Acres. Out among the tree in the fields she could see Big Mac laying on his back. Applejack was riding his massive stallion cock, the biggest she had ever seen, while Cheerilee and Sugar Belle sat at either side of them holding Applejack's front hooves.

"Oh, Dear. That's-" Rarity gagged.

"Really messed up!" A high pitched voice squeeled as Pinkie Pie, dressed in black shrouding bounced up beside Rarity.

"Pinkie!? You're behind this?" Rarity gasped with shock.

"Not just me!" Pinkie Pie pointed down the path.

Rainbow Dash quickly caught up to the yellow pegasus and tackled her to the ground. The pegasus cowered as Rainbow Dash bit at her mask and pulled it off with a thrash of her neck.

"FLUTTERSHY!?" Rainbow Dash gasped in shock. She looked back down the path at Pinkie Pie and Rarity. Rainbow Dash helped Fluttershy up and the two pairs of mares met up in the middle of the path.

"I think this is the part where you two explain what's going on here." Rainbow Dash demanded.

"Darling, If this is your idea of a practical joke." Rarity huffed and turned her nose up.

"Fluttershy asked me to plan a birthday party for Discord!" Pinkie Pie squeaked.

"And um..." Fluttershy blushed and hung her head. "I wanted to make it... extra special..." She blushed as she spoke softly.

"And we heard about the Amory Stone so we borrowed it and it was super fun!" Pinkie added.

"But then we couldn't figure out how to deactivate it off after..." Fluttershy sighed. "We couldn't ask Discord for help because it's bad for his health to use his magic to prevent chaos." she continued.

"So we've been TRYING to sneak it back in and we hoped Twilight would notice that it was on and know how to fix it. But now we're going to get in SERIOUS TROUBLE!" Pinkie shouted, causing Fluttershy to cower.

"We could sneak it back and then tell Twilight we found it activated." Rarity suggested with a wink. The other three looked at her in shock.

"That doesn't sound very PROPER or LADYLIKE" Rainbow Dash teased.

"Well it's OUR investigation, not just mine. So I suppose we need to compromise." Rarity smiled. All four ponies burst into laughter.

As morning arrived Rarity and Rainbow Dash sauntered casually into Twilight's office. Their manes were in disorder and their eyes slightly red from the lack of sleep. Twilight was reading through a stack of papers while Spike stood at her side.

"Any news on your investigation?" Twilight asked.

"Uh, yeah..." Rainbow Dash said.

"We searched high and low and when we checked the relic room we found that the Amory Stone had somehow been activated!" Rarity explained dramatically.

"Really?" Twilight raised her hoof to her chin. Spike grinned nervously and stared out at Rarity and Rainbow Dash. "I could have sworn I checked on it and it didn't appear activated. Oh well." Her horn glowed and everybody instantly felt less aroused.

"Really? That's ALL it took?" Rainbow Dash rolled her eyes.

"I'm just glad things can finally return to normal around here." Twilight sighed. "I'm looking forward to your full report on your investigation." Twilight smiled.

"And just how FULL a report do you mean, darling?" Rarity asked nervously.

Rarity and Rainbow Dash both looked at each other nervously. They paused for a moment and then burst into laughter together.