"Thou used to be cool"

[Many months later]

Celestia collapsed on top of Luna, exhausted, her semi-rigid penis still hilted inside her sister. "Wow..." Was all she managed to say.

"I told you it was fun to be a stallion."

She let forth an exhausted sigh and chuckled. "You did..."

"Would you care to tussle betwixt the sheets again?"

"I think I'm done..." She replied, rolling off of Luna. She looked down at her penis and laughed quietly. "I still can't believe you can actually do that spell."

"It's not that hard, honestly... Just takes a bit of practice."

"Speaking of practice... are you sure you're ready for tomorrow?"

"NightMare Night? Why wouldn't I be ready? It is Our night, is it not?"

"Right, I know, but it's—"

"We know, We know, it's a holiday for foals now. We will do our best to maintain..." She looked disgusted as she continued. "Decency. Though We are still not sure what else it is ponies do for fun."

"Luna, don't worry about that. I'm sure that Twilight and her friends will make sure you are adapted to modern social conventions."

"And then, perhaps, We may adapt her to ancient social conventions?"

"Not yet, Luna."

"We grow impatient!"

"You know what must come to pass in Twilight's life. It has been written. If we interfere—"

"Alright, sister, We understand. Do not bore Us any longer with talk of prophecy... Cadence and I must see to the Prince."

With a flash of Luna's horn, Celestia's penis contracted and was absorbed into her body, while brand-new mottled flesh-sticks sprouted from Luna and Cadence's groins. Across the room, a thoroughly bound and blind-folded Shining Armor waited upside down with his legs spread apart.

Cadence bent down and whispered in his ear. "Shiny... We're gonna play a sexy little game..."

He smiled. "What's that, hon?"

"It's called, 'guess which mare-dick'."

"Huh?! Grrk—" Cadence hilted herself deep inside Shining's ass.

"So?"

"Y-you?"

"Wrong! We're gonna keep going 'till you get it right!"

"That's not nice, Cadence," Luna whispered.

"Shhh... I'm having fun..."