Sibling Revelry

The next two weeks took ages to pass. Which is to say, they passed by at normal speed, but Twilight and Shining were so excited that the time seemed to pass ridiculously slowly. The day they received the notes from their parents, they were so giddy that they jumped for joy, quite literally.

Twilight arrived first, carrying a duffel bag. "So, weekend trip to Trottingham, huh?"

"Yeah, just a light business trip," chuckled Night Light, giving his house key to his daughter. "We need to make sure that what we set up on our last trip is working properly. If all goes as planned, this should be our last trip for awhile."

"A real shame," groaned Twilight. "I was looking forward to more time with Shiny."

"You can still visit him in the Crystal Palace, can't you?"

"I suppose, but then all of the crystal ponies will feel free to interrupt. The only quality time we can have is when neither of us is able to be reached by our responsibilities."

Just then, there was a knock at the door. Twilight Velvet answered. "There's my big, strong boy. How are you, Shiny?"

"I'm very well, thank you for asking," responded Shining Armor. "Is my little Twily here yet?"

"Over here," waved Twilight. Seeing his little sister caused Shining Armor's heart to soar. Seeing the duffel bag at her feet, however, made him very nervous. He had no idea what kind of toys she'd brought.

"Well, I suppose that's our cue to leave," chuckled Night Light. "You two have fun this weekend. We'll be back on Monday, around noon."

As their parents walked out the door, the siblings' anticipation grew. They knew they'd have to wait an hour before starting to give their parents a chance to catch their train, but the waiting was just terrible. As soon as the door was closed, Shining Armor grabbed Twilight by the wrist, pulling her up off of the couch and wrapping his arms around her. She responded by wrapping her lips around his tongue.

"I missed you so much, Shiny," Twilight moaned as she grabbed her brother's butt. She could feel the panties he was wearing through his pants.

"I missed you too, Twily," responded Shining Armor, slipping a hand up her shirt and rubbing her breast. "I have so much I want to tell you about."

"How about you show me, stud?"

Shining Armor chuckled. "Not yet, Twily. First thing's first, I brought the right mead this time." He reached into his bag, pulling out several bottles of mead. These looked exactly the same as the old bottles, save for a small x at the bottom of the label. With the wine in the freezer, the two sat down on the couch and began discussing their exploits for the past two weeks.

"So that's how I ended up with my own custom strap-on," concluded Twilight. "What about you, Shiny?"

"Cadance hasn't let me cum since I went back. She had me fitted for a chastity cage and hasn't let me take it off."

"You have a chastity cage?" asked Twilight excitedly. Her hand flew to her brother's crotch. She could feel something hard between his legs, but it certainly wasn't swollen. "You really are her little bitch boy."

"Twily, ple--"

"Shush, little bitch boy. From now on, when we're alone, I want you to refer to me as Mistress."

"But that's what I call Cadance..."

Twilight thought for a moment. "Then you are to call me Daddy. I'll be wearing a strap-on anyway."

"Yes, Daddy."

"Good little bitch boy."

The rest of the day proceeded as normal until right after dinner. They had been careful for long enough by now, surely. As Shining Armor finished the bottle of wine, Twilight opened up her duffel bag. Stripping away her clothing, she slid into her strap-on belt and secured the dildo she wanted to use on him first. Meanwhile, Shining Armor fastened his collar and leash, taking off his outerwear. He was wearing a lacy blue thong and a matching bra, accompanied by a blue and white pair of stockings.

"You look so cute and fuckable, Shiny," Twilight grinned, licking her lips. "Pull down those panties. I want to see that chastity cage."

Shining Armor fell to his knees, spread his legs, and slipped a thumb into his panties. With a gentle pull, Twilight could clearly see his limp dick trapped inside the small frame. She also caught a glimpse of what else was hiding in her brother's panties.

"Is that a vibrating butt plug?"

Shining Armor closed his legs. "I'll have you know that it's a vibrating butt plug dildo. Normal butt plugs feel like a plug. This one feels like a cock is inside you all the time."

Twilight could not stifle a laugh. "You like having a cock up your arse all day?"

Shining smiled. "Dou you want to replace it?"

"Not yet," chuckled Twilight with a malicious grin. "First, there's something I've always wanted to try since I first wore mom's strap-on." Grabbing her brother by the mane, she shoved her dildo in his face. "Suck me off, little bitch boy."

Shining Armor was shocked by this new display of dominance from his sister. Not that he didn't like it, of course. In fact, he loved it. Without any complaint, he began to tongue the rubber cock, showing off what he'd learned from years of sucking stallion dick.

While Twilight couldn't appreciate the tactile pleasure of swabbing her brother's throat, the power she felt that she held over him was making her wet. She couldn't wait to plow his tight arse later, but she first had to teach him his place. Or she would, had he not already known it. She began to thrust her hips forward as Shining's lips sealed around the dildo.

If you had told Shining Armor five years ago how much he would enjoy having his sister's shaft fucking his throat, he'd have punched you right in the face. If you said the same to him now, he'd kneel down and take your cock into his mouth, trying to pleasure you into keeping it a secret. Things certainly change when your wife has the most intense libido the world had ever seen.

Twilight finally pulled him off of her cock and out of his thoughts. "Ready to take me in your arse?"