Vindicated Depravity

‘Twilight’ groaned and shuddered under the constant barrage of Shining Armor’s thrusts, her chest and face pushed into the pillows repeatedly. Sweat matted both of their coats, and a slick dribble of sexual fluids was spilling from around Shining’s embedded cock, seeping from within the clenching cunt of his little sister.

‘Twilight’ groaned faintly, biting down on the pillow to try and stifle her noises as each rocking thrust from Shining Armor drove deep inside her, filling her utterly with his thick, round cock. Her wings fluttered in reflexive spasms, and her rump lifted as high as it could, giving the best angle she could afford to her husband’s motions.

The paint that Cadance was wearing smudged faintly from their sweat and the delicious friction between them, causing Shining’s pristine white coat to become smudged with purple.

A constant stream of encouragement left the alicorn, her panting supplications occasionally halting from a particularly brutal, liberating thrust. “Y-yes big brother! H-harder! I can take it! I’m a big mare now!”

Shining Armor growled and gripped his ‘sister’ tighter, hooves clasping around her middle, helping to hold her in place against the constant rocking motion of his eager thrusts. “G-getting close, T-Twilie,” he panted into her ear, before biting down on it lustfully, braying an eager snort of exhale into her mane.

“Yesss...” Cadance breathed, her ears pinning back a little bit as she squirmed at the dominant bite. Her muzzle parted and tongue lolled free as she was fucked so hard, another orgasm overcoming her, causing rippling spasms of delightful milking motions to squeeze and clench at the thrusting member. “C-cum in me, big brother!” Cadance cried out lustfully, “S-spill it all deep inside!”

Shining Armor growled heatedly against his ‘sister’s’ neck, burying his muzzle against her, hooves gripping her all the tighter as he drove himself into her over and over again, rocking her form back and forth even with the tight grip to hold her steady.

With an eager growl, and a few rough, almost violent strokes, the tip of Shining’s cock flared within his ‘sister’, stretching the soft, moist inner flesh around the swelling cock. Rapid throbs pulsed through the thick member, making the stallion’s motions grow jerky and rougher. With just a few quick tugs, the length of swollen flesh tensed within her, stiffening and jerking rapidly. Repeated gooey bursts of thick semen splashed across her inner flesh, painting it with the heavy bursts of cum, drenching the moist inner flesh with the sticky loads. Shining Armor snarled in delight, holding himself deep inside, flared tip pressed against her very deepest barrier, each fresh spurt of his urgent spunk dashing against her deepest reaches over and over again.

Cadance tensed up, her back arching and wings fluttering on reflex, stiffening and quivering repeatedly. The alicorn’s insides clenched around the spurting cock, squeezing and embracing it in a vice-like grip of milking, rhythmically convulsing flesh eager to coax out every last dribble of his spunk.

The stallion gave a low groan and collapsed atop his ‘sister’, panting hard and shifting weak hooves to hold around her middle, burying his nose in her mane with a low groan. “Oh sweet Celestia, Twilie. That was good.”

Cadance panted up at her husband, a goofy grin plastered across her features, wings slowly lowering, resting on the blankets. “That was gooood big brother,” she murmured, in the perfect mimicry of Twilight.

Shining Armor looked down into the doppelganger of his little sister and leaned in to kiss at the base of her horn, grinning. “I love you, Twilie.”

The two ponies stared into each others eyes for several long moments.

A prickly sensation rolled across the back of Shining Armor’s neck, and he blinked once, looking up.

Twilight Sparkle stood in the doorway, one hoof on the door itself, eyes wide and mouth open, a picnic basket levitating beside her. Somewhere in the back of his mind, Shining Armor remembered that he had meant to take Twilight on a picnic that afternoon, and she must have come looking for him.

The forefront of Shining Armor’s mind however, was focused on the fact that his slowly-leaking spunk was drooling from his wife’s cunt, who was painted up to look like his little sister, who was standing in the doorway!

“T-this isn’t what it looks like,” Shining Armor stuttered, fumbling over the words in a mix of anxiousness, fear, and post-fuck-session bliss; a bliss that he was quickly coming out of as he realised that Twilight Sparkle was standing in the doorway! Who knew how long she had been there?!

Cadance blinked and lowered her gaze from her husband eyes, following his line of sight to where Twilight stood in the doorway, aghast, watching them both.

A long, awkward silence stretched between them. The silence was broken as Twilight turned away from them and bolted down the hallway, the picnic basket falling with a clatter to the floor.

In mere seconds, Shining Armor was following after her, slipping out the door with a call of, “Twilie, wait!”

Twilight was already halfway down the hall when Shining Armor made it to do the doorway, and he had a glimpse of her rump disappearing around a turn and her tail flicking out of sight.

Shining Armor bounded down the hallway, but by the time he got to the corner, Twilight had already disappeared.

Shining Armor shifted his hooves uncertainly, his head lowered and eyes on the ground in front of him as he walked. It was a few days after Twilight had seen he and Cadance together like that, and he hadn’t heard a word from his sister. He had sent a letter to her, imploring her to speak to him, but it had gone unanswered.

It was one of Shining’s rare weekends off, and he was supposed to be taking Twilight out for another picnic. It would be the first time he had seen his little sister since she had caught him and his wife in such a compromising position. He fully expected Twilight to stand him up.

To his surprise, however, Twilight was standing where Shining was supposed to pick her up; in front of Sugar Cube Corner. She had a bag over her cutie mark, and a basket was levitating in front of her.

“Hello,” Twillight said with a wave of a hoof.

“Uh... Hi Twilie,” Shining Armor said nervously. “Ready for the picnic?”

Twilight lifted up the picnic basket, jiggling it a moment. “I see you’re as observant as ever.”

Shining gave a weak laugh and shook his head. “Well c’mon then, Twilie,” he said, as he turned and started back up the path towards Canterlot, heading for their favorite picnic spot.

It was a quiet walk, and they didn’t talk at all. Shining Armor wasn’t sure what to say to her. Maybe she didn’t even get a really good look at what he and Cadance had been doing?

“So uh... about last week,” Shining nervously said, rubbing a hoof against the back of his neck.

“Yes?” Twilight asked blankly.

“Sorry about not picking you up, something uhh... came up,” Shining replied lamely, his ears splaying.

“You refer, of course, to your penis?” Twilight replied flatly.

Shining spluttered at that, and Twilight just gave a smug snort before walking ahead of him in triumph.

This put shining in a rather interesting position in relation to her, and he found his eyes lingering on her rump and the swaying purple tail. His cheeks flushed just faintly with blood, and he shook his head rapidly to clear it of the depraved images suddenly springing into his mind.

“Th-that wasn’t it at all!” Shining protested, bounding forwards to catch up with his little sister, so that he didn’t have the tempting view of her rump in front of him.

“Oh? So that wasn’t you I saw atop Cadance in the castle when you were supposed to be picking me up?” Twilight asked calmly, raising a brow at her brother. “If not, then perhaps you should ask her who she is cheating on you with.”

“I... Just... But...” Shining Armor spluttered, unable to respond, thinking furiously.

Twilight lifted a hoof to rest on her brother’s lips, keeping him quiet. “Shine, you’re a stallion. Stallion’s have needs. Your wife is a full-grown mare. She has needs too. I’d just rather you told me before you ditched our picnic to mate with your wife.”

“It wasn’t like that, Twilie,” Shining protested urgently. “She kinda jumped me.”

Twilight gave a giggle at that, “Cadance is the alicorn of love. Lust is part and parcel of love... It’s only natural that she'd want to do that with you.”

“I know, but I still feel bad... I should’ve sent word that I wouldn’t be arriving. It just kinda... slipped my mind,” Shining Armor said ruefully, ears splaying back.

A faint pink tinge marked Twilight’s cheeks as she looked back over her shoulder at her brother. “S-shine... Why was Cadance painted purple...?”

Shining Armor’s heart began to pound faster, and his mouth went dry. “W-well, s-see, she just wanted to uhm... Try out a different c-colour scheme...”

Twilight shook her head, lifting a hoof to halt her brother’s words. “Y-you called her T-Twilie.”

Shining’s stuttered at the blunt accusation, his ears pinning back flat against his skull. After a few moments, he fell silent, looking down at his forehooves in shame.

Sensing movement in front of him, Shining Armor looked up. His mouth fell open, and his eyes widened.

Twilight was bent over, chest to the ground and rump in the air, her tail twitched to one side, exposing everything to him.

Shining Armor closed his mouth and swallowed hard, his eyes automatically drawn to the sight of his sister’s cunt bared so willingly to his gaze. The soft purple fur that covered her form was visible between her thighs, leading up to the soft, pliable outer lips of her sex. Her position was causing a slight strain on her flesh, causing the outer lips of her cunt to spread slightly, revealing the tinge of pink hidden between them. His heart thudded violently in his throat as he stared at this wondrous sight.

Twilight wiggled her rump back and forth for a moment, looking back over her shoulder, eyes narrowed, as she whispered, “And do a little shake...”

Shining Armor swallowed once more, and then looked away pointedly, his cheeks flushed deeply with pink, tail twitching back and forth behind him in reflexive spasms. He added up columns of numbers in his head, trying to concentrate on something other than the sight of his sister’s luscious cunt so close in front of him. It was all in an effort to keep the swelling between his legs from taking place. That would be impossible to explain away.

“I remember you always loved to watch me when I did that...” Twilight breathed, straightening up and turning to face her brother, her head tilting slightly to the side and ears pricking upwards. “...You’re... You’re attracted to me, aren’t you, Shine?”

“T-Twilie, I,” Shining started to say, shaking his head firmly and refusing to look up, aware of the warmth in his cheeks.

Twilight snorted once, lifting a hoof to halt his words. “Don’t lie to me, brother.”

Shining Armor winced at her tone, and then hung his head. “I... Yes,” he admitted, with painful honesty. “I am.”

By the time Shining Armor looked up again, Twilight was already long gone, disappearing down the path and away from her lecherous brother.