Sibling Revelry

The siblings showed no sign of slowing down. Before Shining Armor could wipe his face, Twilight had already aligned the tip of his cock with her vaginal entrance. In the next moment, he was inside of her, being milked by her spasming musculature.

Twilight was in absolute ecstacy, the feeling of fullness compelling her to lose herself to him. Despite that, she still held on to what little shred of self control remained, as that was the part controlling her pen. She would need those notes to recreate this experience. While part of her questioned whether or not it was wise to recreate it, the pleasure she was feeling at this moment demanded that she at least try.

Twilight grabbed Shining Armor's wrists and pulled his hands up to her breasts. Once his thumbs found her nipples, he began rubbing and massaging the soft mammaries. Her hands relocated to his chest, gripping his pecs as her hips started to piston slowly.

After several minutes, Shining Armor's hands shifted to his sister's hips and he sped up. For the first time that night, Twilight's mind was so occupied by the pleasure that she dropped her notes. Presently, he pumped a load into her awaiting womb. Had she been able to think clearly, she would have been horrified by the fact that she was not taking any form of birth control, and she may very well be carrying an incestuous baby inside of her for the next nine months. However, as her mind was fully enveloped in endless pleasure, she didn't really care right now.

As she rolled off of him to catch her breath, her foot fell off the bed and brushed against the dildo. She reached down and picked it up, waving it in her brother's face. "Tell me, Shiny. Where did you find this thing?"

"It was in that box," Shining Armor said, pointing to the foot of the bed. "The one you found yesterday."

Twilight climbed off of the bed and pulled out a large wooden box from the foot of the bed. "This one?" Shining Armor nodded. Opening the box, Twilight was met with a wide assortment of sex toys. From vibrators to butt plugs, from strap-ons to ball gags, this trunk had a vast arsenal. There was even a gallon jug of lubricant, which was almost half empty. What kind of crazy sex did their parents have?

There were sanitary wipes, so she cleaned the dildo and placed it back in the box. She would have no idea how to explain why the batteries were drained, but she hoped the question would not come up in conversation. As she was securing the toy in its slot, she found herself staring at another, and she felt compelled to try it out. Casting her panties aside, she put her feet through the leg holes in the strap-on and slid it up to her waist. It had a horn insert inside the front, and a butt plug secured to the back. With Shining Armor's seminal fluid leaking out of her, it was very easy to slide these into her holes and secure them in place.

With the straps tightened down to keep the belt from moving around, Twilight lubricated the shaft and returned to her brother, who had lifted his legs in preparation for what she was planning. His cheeks flushed red as she placed the tip against his pucker, and he let out a loud moan as she pushed into him. This dildo was smaller than the one they had played with last night, but certainly more involved.

"Yes, daddy!" shouted Shining Armor. "Fuck my tight boy pussy!" Twilight, while not Shiny's father, was more than happy to oblige, as every thrust was met with an adorable moan from her brother. She gripped his thighs for better leverage as she slammed into him repeatedly. Every thrust pushed back against the strap-on as well, pushing the horn back and forth inside her vagina.

Soon, his moans became too much for her to handle, and she had to find a way to shut him up. She leaned forward and shoved her tongue into his mouth, dripping the massive collection of drool she had accumulated onto his neck and chin. This worked for a few seconds, but their bodies were moving too violently to keep their teeth open, and they kept accidentally biting each other's tongues. Then she remembered the gags that had been in the box. She reached in and pulled out the first one.

Most kinky ponies would have access to a ball gag. It was an effective method of silencing one's partner. Others would step up from that, using a bit or bar gag, to press the tongue down. The benefit gained by this is that you can drain fluids into your partner's mouth, which you can't do with a ball gag. The next step from there were ring and spider gags, which held the mouth open enough that you could insert solid objects. If the ring was wide enough, you could even shove your entire cock in without fear of the receiver biting down. While all of these were in the box, none of them were what Twilight grabbed.

Were it not for the fact that it was in the gag section of the box, Twilight might have mistaken this for another strap-on. It was a rubber dildo that had a firm tube running its entire length. The purpose of this one was to make your partner feel like they had a cock firmly embedded in their mouth at all times, while still being able to breathe. Shining Armor took the whole thing in one go, making Twilight wonder how many stallions he had been with in the past. Still, he was quiet now, and that let her focus on her thrusts.

Neither of them lasted much longer, with Shiny being the first to blow. In a flash of white, both of their faces were covered in spunk, along with the bedspread, the carpet, and part of the wall. Twilight followed soon after, though hers was mostly contained by the belt she wore. It leaked out, certainly, but it didn't squirt everywhere as it had the last time. She collapsed next to her brother, both of them gasping for breath and covered in each other's sweat. That's how they fell asleep that night.