Sunset shimmer squirms, the leather straps held her tight as Celestia slowly steps toward her with a riding crop in hand.  
“Twilight told me all about what happened on the other side of the mirror…”  
“Mmmph!”  
Celestia smacks the riding crop against the palm of her hand.  
“Using the Element of Magic to try and invade Equestria with those… odd upright beings?”  
“Mmmggghhh…”  
Sunset looks down at the metal bar running between her legs, grumbling in frustration. If one thing was learned from this experience it was this: being caught by Celestia’s students is humiliating.  
“You’re a very naughty girl, Sunset…”  
Celestia presses the end of the crop against Sunset’s crotch, sliding it gracefully up her smooth, almost featureless chest. Sunset blushes, looking away to hide her arousal.  
“.. a naughty…”  
She brings the riding crop over her breasts.  
“… naughty…”  
The crop glides over the tight collar bearing the symbol of Princess Celestia, marking Sunset as Celestia’s property.  
“… girl, Sunset Shimmer.”  
The crop holding Sunset’s chin up as the salivated on the tight ball gag. Her frustration at getting caught was being overridden by her delight at being humiliated. She won’t ever admit she enjoys this, but what happens in Celestia’s beach house… stays in Celestia’s beach house…  
… unless a passing pegasus happens to see it.
 
(written by me, edited by my Description Bitch.)
 
I almost sent this out with too long of an arm. But acting on a suspicion, I flipped the whole picture upside down and caught it in advance.
 
Three days in Photoshop.
 
Thanks to all the people on Derpibooru, DeviantArt, and FurAffinity for helping me spot anatomy errors. Special thanks to my “Critique Guy” Eggonaut. Get well soon, buddy, and try not to have so many accidents with the haunted woodchipper, eh?
 
Catering by Coca Cola.