The night was here. And tonight was a special night. With no threats to Equestria over the last few months, and with everything running smoothly in both the Crystal Empire and the surrounding Ponyville area, Princess Cadance and Princess Twilight finally had a full evening to visit each other, the locale for their meetup being the youngest Alicorn’s humble little library. While there, they discussed the usual things; How they were doing, things going on around their respective towns and kingdoms, Twilight’s studies, and so on and so forth.
 
But, simply catching up wasn’t the only thing they did. You see, Shining Armour and Princess Cadance’s relationship, while incredibly strong, they agreed to also keep it relatively open. With Cadance being the Princess of Love, sometimes one pony just isn’t enough, and when she brought the idea of her and Twilight having some “special” getogethers to him, he didn’t have any problems with that, nor did her sister-in-law - who has had a small crush on her for years.
 
Tonight was one of those special meetups. And this time, Cadance brought some special equipment with her: Two special latex straitjackets with crotch straps, the special part being the built-in suspension line and rings on the back to lock the other pony’s arms into, a set of legbinders, a connected ballgag, wing straps straps, and special magical inhibitor rings that pop off the horn after a specific time period, with these ones being the three-hour model.
 
The two mares quickly ran to Twilight’s room, almost immediately pulling on the pre-lubed jackets upon entry, strapping them on nice and tight, (especially the crotch line.) then they hugged each other, locking their arms behind the other’s back. soon after, their horns lit, and the suspension lines were launched to the ceiling, latching to a set of hooks above them. With a few pulls, they were lifted above the floor, their bodies gently illuminated by the moonlight outside as they climbed.
 
Next came the legbinders, their magic yanked them up and pulled the straps tight, locking them together. Then came the wing straps, locking them from opening. And then came the gag, the two mares quickly pulling the straps behind their heads and pulling them tight, locking them into an endless gag kiss. And finally, the horn rings. They levitated them above their heads, right to the tips of their horns. They slid down, and with a small clap, locked into place, sealing their magic away.
 
For a while, they wriggled and swayed, a blush working upon their faces as the crotch straps dug into their lower lips, but then their eyes shot open when a knock came from the door. Somebody was outside the door. And then it hit them.
 
The forgot to lock the door.
 
Unable to stop it, the handle slowly turned, and what felt like an eternity, the door slowly opened, and from it, a certain purple drake popped his head through. Spike was supposed to be going to Rarity’s that evening, but was only getting ready to leave when Equestria’s royalty ran upstairs on him. He only came up to tell them he was leaving. But what did he find?
 
His legal guardian and former babysitter trussed up with straps and kissing each other.
 
That was enough to get his pupils to shrink and cheeks to go rosy read as he slammed the door, the sound of his claws running down the staircase clearly audible to the mares. Unfortunately, the two alicorns couldn’t go after him for another two and a half hours.
 
Once they could though, there’s going to be a few awkward conversations to get through.