To Be Pounded: Clop Compendium.

Princess Luna, co-rules of Equestria and her sister's lover was having a bad day. First, her sister Princess Celestia had gone AWOL, somehow finding a way out of her cuffs; Luna took a lot of time making those specifically to keep her contained.

She walked down the hall, ponies rushing out of the way of the fuming princess. She had an angry look on her face and her wings were twitching every so often, making it look like she would lash out at any second.

Luna turned the corner and trotted into her room, wondering why her door was left open; she would have to ask the cleaners later about that, if she finds herself bored.

Walking inside, she notices that a few of her books were knocked onto the floor and the door to her meditation room slightly ajar. Walking over to her bookcase, Luna checked to see if any of her books had gone missing; some of them were dangerous, or kinky if misused.

Gasping, Luna throws half of the books off the shelf and picks it up in her magic, scattering the rest of the books over the floor. "Where is it?" She shouted, shaking the shelf around. She brings it closer to herself and feels around inside, making sure that she hadn't missed anything. "Nononono..."

Dropping the shelf with a crash, she backed up, hitting her rump into her bed. Turning, she remembered her meditation room and eyed it with hesitation. Her anger bubbling up and adding to her previous rage, Luna slowly walked forwards and pushed the door open with her magic, causing it to squeak sharply. She winced, hoping that she hadn't alerted the intruder to her presence.

Sure she was immortal, but that didn't mean she couldn't be killed and that would be a nuisance as she would have to explain to her parents how.

Pushing the door open some more she walked in, her eyes perfectly suited for the low light she preferred to meditate in.

Her mediation room was sparsely furnished, usually the only things she placed in there were a cushion and a rug, the cushion was for sitting on and the rug was because of the stone floor.

The walls inside the room were bare, the only notable features were a few wooden beams that travelled down the walls, giving the illusion that the ceiling was being held up.

Due to the very nature of the room, Luna had it soundproofed. Every time she needed to get away and think or to practice a new spell she would come here and spend a few hours.

Luna poked her head through and frowned, no-one was in the room. 'Strange...' She thought, walking in.

As she neared the centre of the room, a bright flash forced her back against the wall, knocking her head and blurring her vision. She looked over, struggling to stay awake and saw a familiar white blob walk closer. Holding a hoof up, Luna tried to say, "Stay away," but it came out as a garbled mess.

As the white blob touched her hoof, she felt a jolt of electricity run up her leg. She had felt this before, back when they were on vacation, they had kissed.

Waking up, Luna groaned. Her head was killing her and she had trouble focusing on anything. She was lying in bed with her drapes having been closed around her bed.

She laid back down and thought about that white blob, 'Who was that... Celestia wouldn't need to teleport in...' she spent the next few minutes trying to focus on unbundling her thoughts, when the drapes on her left were surrounded in a golden aura. Luna closed her eyes and turned over and pretended to be asleep.

The drapes pulled back to reveal Celestia, only it wasn't. This Celestia was male, with a chiselled chin and a firm, but supple rump that shouted "Grab me!"

He trotted forwards and looked Luna over, being careful not to disturb her. He leaned down and kissed her cheek, lingering a few seconds longer to enjoy her scent. Pulling back, he smiled and levitated over a small teddy bear and placed it next to Luna, before closing the drape again. Male Celestia walked off and out of the room, whistling.

Luna opened her eyes and touched the spot she had been kissed. It felt so much like Celestia's kisses and let go of her anger from before, simply wanting her back in her embrace, peppering her with kisses and love.

Luna leaned up and pulled away the covers. She moved the drapes with her magic and stepped off the bed, making as little sound as possible and noticing that the bookshelf had been re-stocked with the books that were dropped on the floor; the room had also been cleaned, surprising her.

"Who was that..." she asked herself as she stumbled around. She made it to the door without falling over, but caught her front leg on the carpet and fell forwards.

Just before she hit the ground, two White legs caught her and held her firmly in their grip. They brought her up and Luna saw who they were attached to: male Celestia.

"Hi..." Celestia said, giving a small awkward smile.

Luna shrugged herself out of his grip and backed away. "Where's Celestia, who are you?!" She shouted, unsure of what was going on. Her head hurt and she was confused.

"I am, well I was. It's difficult to explain..." Male Celestia said, he was concerned for his lover and moves forwards to make sure she didn't hurt herself in her confusion. "Luna please, get back in bed, I'll try to explain."

Luna stopped and thought about it. Should she call the guards, or listen to the sexy stallion in front of her? It had been a long time since Celestia tried out that endowment spell.

She nodded her head and stumbled over to her bed, waving s hoof when Celestia tried to help, "I can do it myself."

Male Celestia held her hoof up, "Didn't say you couldn't." He watched Luna step up onto her bed and caught a glimpse of her mare hood as her tail slightly swayed, giving full view. He tried thinking of other stuff, to take his mind off of the idea of rutting her right away but unsuccessfully he couldn't and felt his own manhood slide from its sheath.

Luna slid into bed and waited for that stallion to explain what was going on. Maybe it was the concussion or something else, but she knew he was different; she and Celestia had done Gender swaps before for fun as it scared their subjects, but this guy wasn't just a spell.

The stallion opened the drapes and saw Luna laying there, the covers brought up to her neck and her looking at him with one ear folded down. He found it hard to concentrate, but owed her an explanation before he screwed her brains out and by Faust he would give it.

He jumped up onto the bed and laid down, facing Luna. "My name is Solaris and I am technically your brother."

Artemis breathed in heavily and watched Luna's face for any signs of anger, or worse, freaking out; there was nothing on her face, just a blank expression that seemed out of place.

"Luna, are you alright?" He asked, placing a hoof onto her forehead.

She shook then looked at him, a confused expression adorning her face. "I'm sorry, what?" She asked, not understanding everything correctly, "Celestia, can we stop with this prank now, you got me..."

"Luna, I'm not your Celestia."

"I....wha...how!?" Luna shouted, moving away from Solaris. She scrambled backwards, throwing a pillow or two at him, which he gladly took and sat there watching her. Luna went to jump off the bed but was caught in mid-air by Solaris. "Let me go, I'll call the gua-mpf" she was cut off by Solaris plugging her mouth with his magic.

"Luna please, I'm not going to hurt you, I love you." Solaris placed Luna down, back in her spot on the bed but kept her in his magic. It hurt him to see her scared like this but it hurt him more to know that he was the cause.

Solaris slowly removed the plug and waited for her to call the guards. If she really wanted to, he couldn't stop her, he could only hope she didn't.

After ten seconds, he decided he could speak as Luna simply stared at him, unable to move her body. "Let me start over... I am Prince Solaris, co-ruler of Equestria with my brother Prince Artemis, my lover. Your Celestia used a spell to travel to my universe where we... had fun." he coughed into a hoof awkwardly and continued, "Anyway, when she had to come back, she had the idea to send me through instead. She said, "It might be beneficial to see how the other half rules", then she cast the spell on me."

"So..."

"Yes, I am technically your brother, I share the same DNA as your sister, slightly changed so I'm a stallion. But almost everything else is the same, I love cake, I like to lounge around on weekends reading with Prince Dusk Shine and most importantly, I love you." Solaris looked into Luna's eyes and cupped her cheek with a hoof, she didn't try to move, which was a good sign." "It doesn't matter you're not male or my Artemis, you're still the same; to be honest, there's not a lot of Alicorns left... We can't be picky, not anymore." he looked down, a look on his face that spoke of loss, one that Celestia wore sometime when she thought ponies couldn't see it.

Solaris released Luna and was immediately wrapped in a hug. "I'm sorry I shouted and threw pillows at you..." she whispered into his ear.

He wrapped his legs around her and hugged back, smelling her scent. 'Just like his.' he thought as he nuzzled her neck. "Thank you dear sister..."

He leaned back and stared into her eyes, they we're just like Artemis' and he felt himself getting hard from the contact.

Luna looked down and her eyes widened, she looked up and said, "Really, Now?"

"I can't help it, you're too sexy... I've never been with a female version of Artemis... I've been female, but he refuses for some reason..." Solaris explained, hoping she would understand.

Luna sighed, "Fine, I can't blame you. I am pretty smoking anyway." she replied, shaking her ass and giving him a sultry look.

Solaris gulped and glanced at her mouth, wanting to go in for a kiss. 'Artemis is more forceful...' he thought as he leaned in.

Luna saw him lean in and thought about it, 'It's not cheating if it's your gender swapped version from a different universe, is it?'

Deciding the answer wasn't worth figuring out, she shrugged and mashed her lips against his, feeling that energy that only Alicorns really feel. It was like the universe was spurring them on, wanting them to fuck.

Luna wrapped her legs around his neck and let him lean her back, so that he was onto. She moaned as she felt his hoof travel down her body, feeling her slim and toned body.

Apparently he liked what he felt as he increased his roaming and found her nipples which he started playing with; tugging and twisting slightly, making Luna squirm and go wild with excitement.

Luna unwrapped her legs and traced a line down his muscular body. She felt herself become moist as her hoof felt his incredible muscled which wrapped around his barrel. 'OH Faust he's sexy!' she screamed internally, barely able to contain herself at the thought of being bucked by him. It was one thing to have your sister grow a dick, it was another to actually be bucked by a male.

Her hooves went lower and she felt what she was looking for. It was only a semi, but it surpassed anything Celestia could grow. 'I'm sorry sister, but I can't help it. Forgive me.'

She held it gently and began to pump. She could feel it grow in her hooves and loved that feeling. She used her magic to fondle his testicles and found that they were bigger than even Big Macintosh'.

Anticipating the full event, she moved one hoof across and onto her own sex. Rubbing her outer lips, she parted them and gasped into Solaris's mouth, giving his tongue access. Luna moved her hoof in and out of her rapidly swelling cunt. She stopped playing with his, now fully erect penis, and started to play with her button; twitching every time she flicked it.

Pulling back and nuzzling her, Solaris made his way down her body. Making it to her nipples, he couldn't help but suckle on them for a few, causing her to bite her lip and push his head down further.

He finally made it to her mare hood and smiled, she was frantically moving her hooves around, trying to get every last drop of pleasure. He removed her hooves away, receiving a whimper in return.

Leaning forwards, he stuck his tongue out and started to lick up her juices that had spilled all over her thighs and buttocks. Luna required and tried to push her aching sex into his face without luck and shook with need.

Solaris wanted her to NEED it and not simply want it. His tongue made its way up from her ass and barely touched her folds, moving them slightly.

Luna exploded in pleasure, her cunt being set on fire from his tongue. She screamed out, moaning to high heavens and not caring who heard her.

Solaris smiled lovingly at her and plunged back into her pussy. He wasn't as slow this time to pleasure her and soon enough, he had his tongue deep in her, trying to get more of her sweet nectar.

Luna was moaning like a common whorse in heat, but didn't care, this was on par with what Celestia could do and she was loving it.

She could feel her orgasm bubbling up fast as Solaris started playing with her engorged clitoris, licking and sucking at it like a lollipop made of sex.

She was close now and held her hooves on top of Solaris's head, pushing him deeper; she needed him deeper.

Taking that as a sign she was close, he did something that Prince Artemis loved and used his magic to summon up a small butt plug and slid it into Luna's ass.

She felt a bit of pain and then euphoria as she came. She shook and felt herself squirt her juices all over Solaris's face.

He opened his mouth and drank greedily from her fountain. He caught a lot, even though she sprayed everywhere.

Luna felt herself come back to Equestria and sighed in content; this is one she'd have to tell her grandkids, when they were a couple hundred years old, of course.

Solaris heated up and evaporated the juice from himself and stood up. "I think it's my turn," he stated, moving over Luna to lay on the bed. He opened his legs to show his impressively sized cock. His horn glowed and he moaned as it increased in size, growing to at least double it's original.

Luna turned over and gasped, she didn't expect something that size. She knew it wouldn't fit in her at all. Then she looked down and saw his balls, they were the size of baseballs and seemed to be pulsing slightly, making her stare, like some hypnotic spell.

Instinctively she licked her lips and felt her pussy clench, aching to be filled by that monster. Luna crawled forwards and licked the shaft, feeling it twitch as she made it to the head. As she sucked on the tip, she had to stand up to reach it.

She could feel herself drip girlcum onto the bed, soaking the covers and making it hard to concentrate as his musk overpowered her mind; making her want him to pound her over and over.

She stopped and turned around, then bent down and showed off her need to be filled. She started shaking with anticipation as he moved and mounted her, his strong legs wrapping around her barrel; keeping her still as he lined himself up.

Feeling the tip brush against her entrance, Luna could help but whinny. She blushed, but secretly liked it, the freedom of just letting her instincts do whatever they wanted.

Deciding she wanted more, Luna let herself go and be guided by instincts. She didn't want to think now, she only wanted to be rutted till she couldn't walk.

Solaris pushed in slowly, parting her lips and moving forwards. He could feel her vice like tightness squeezing his cock greedily for any and all of his juices.

He somehow managed to hilt himself all the way, his balls swinging against her back legs. Pulling out, he heard her whimper as the void returned and screamed to be filled.

Solaris was more than happy to fill her and pushed in faster than before, receiving another whiney for his actions and watched as her stomach was pushed far out. He pounded her over and over increasing his speed every time and soon found Luna either constantly moaning or whinnying.

He felt that he was close and flipped her around so he could be closer to Luna when he came. He bent down and kissed her, stroking her hair as he sprayed the inside of her vagina with his baby batter.

He felt no end to it. Load after load shot out and filled her up with white hot cum, making her moan and nip at his body, leaving marks showing he is hers now.

Solaris kept coming and soon found Luna's stomach grow from the gratuitous amounts of seed sloshing around inside her. He kissed her belly, licking it lovingly. "Do you want me to go back?" he asked, feeling himself run out of seed.

"I think you can stay for a while... Maybe you can invite Celestia and Artemis for round two?"

"I think I will..." Solaris grinned as he pulled out.

Luna gasped as all that cum gushed out of her, leaving her pussy gaping. The cum sprayed over the bed and pooled under her, leaving her sticky, but content.