Luna had been planning this for a long, long time. Before the nightmare, before her banishment, before all of it and tonight she would do it.

Luna silently moved out of the shadows in her sister's room. She was always jealous of her sisters curves in a way. But no longer. They'd be hers. Along with the rest of celestia's body and mind.

Luna quietly pulled the covers back. She knew tia was a heavy sleeper but no reason to take extra risks

She licked her lips at the sight of her nude form. The plush soft curves. Her full lips, erect nipples lightly leaking milk and most importantly... her tight pussy.

Luna gently climbed onto the bed, pressing her cock against Tia's skin as she lowered her head to drink some of her milk. Tia didn't even stir at the act.

Once Luna had enough she went back to her target, pressing and rubbing her fat tip against her entrance. She could feel it quickly heat up, followed by moisture. "Heh. I always knew you were and easy slut. Always just too prudish to do it." She commented before pushing herself in.

"So... tight" she grunted as slowly more and more of her cock was engulfed by Tia's pussy.

Celestia stirred, her breath picking up as a few moans escaped her mouth.

Luna could feel Tia's pussy trying to pull her deeper but she didn't let it as she rubbed a finger against her clit. "I'm in control and I decide the speed" she grunted.

Tia tossed and turned slightly. Her body's needs growing and it felt far too long for Luna to finally bottom out. "The biggest pony pussy in the land and my cock can still easily press against your womb" she said with a chuckle before pulling back and moving forward. She was using a smooth seesawing action for some time, enjoying the lewd moans Tia let out.

But she didn't want to hold back any longer. She lifted one of Tia's legs to use as to steady herself as she began to jackhammer away. Tia's pussy was hers and she would claim it tonight!

As she was hammering away tia finally woke "l- Luna?! What is the meaning of this?!" She shouted before hurting her own commanding tone with a long moan. She hadn't been laid in millenia and never by a cock Luna's size. It made it hard to keep her mind clear.

"Shut up. Your slutty body was basically demanding someone use it" she said, punctuating her statement with a hard thrust. "Besides. Who can blame me with a body like yours?"

Tia tried to speak a few times but a mixture of her moans and increasingly hazy mind made her fail her first few attempts as Luna slammed against the entrance to her womb. "C-cease this! It's wrong! We're sisters! Equals!" She said once she was finally able to speak

Luna chuckled and stopped her movement. "You're right. We are sisters. But we aren't equals. Not anymore. You belong to me. At my beck and call. If I tell you to get on your knees and suck, you do it."

"What?! Luna, n-"

Luna cut her off, closing her mouth with magic. "And you never. Ever say no to me" she commanded before pulling all the way out. She let go of Tia's mouth and smirked as she opened it to speak, only for it to turn into a moan, followed by a scream of pleasure as Luna forced her tip into Tia's womb. "All of your body is mine" Luna said as her sisters temporarily broken brain opened itself to suggestion. "Always. No matter what it is, if I command it, you'll do it. You'll look for ways to please me even when I don't give you a command." She pulled back and slammed into her womb, snapping her again and again. "You'll take my seed with a smile. It's the best thing in the world to you. Nothing compares"

Tia was a drooling mess at this point as Luna's words buried their way deep into her mind.

Luna decided that was enough for now. Besides, she couldn't hold back much longer and with one more slam into her womb, Luna unloaded. Easily bloating tia's pudgy belly and causing it to glow.

When she finished she piscotty back and closed Tia's legs tight before going up to her mouth and pushing her cock down into it. Tia was still having a series of orgasms as the hot seed sloshed around inside her.

Luna smirked as she closed tia's lips around her base and slowly pulled back, revealing a saliva covered but clean cock. "Good girl" she said simply as she walked into the shadows, leaving her sister a complete mess as her mind tried to reboot

The next night Celestia squirmed in her bed. Something felt... wrong. Missing. Just last night she'd been raped by Luna but... she never said anything about it. She should have at least told her not to do it again!

But instead... she sighed. She knew what was missing and she hated that she knew.

As if on cue, Luna stepped from the shadows. "Hello dear sister" she said with a grin, her light nightgown doing a horrible job hiding the growing erection that tia was having a very hard time looking away from.

"What do you want Luna? Come to repeat last night?" She accused

Luna shook her head and sighed. "No... of course not tia" she said softly as she approached before her grin turned cruel "you were asleep last night" she said as she's forced her cock into her sister's mouth with a long moan. "Oh, I've wanted this for ages. You have no idea!"

Tia hit at her legs and tried weakly to pull away but her heart wasn't fully in it and the taste. Oh by the sun the taste was so good!

Luna detected the moment of weakness and shoved herself deeper, bulging out her throat before her heavy sack came to rest against her chin. "That's a good girl~" she teased as she gently ran her fingers along the outline she made in her sister's throat.

Tia gagged and continued to weakly hit at Luna but the younger sister just chuckled. "Shh... it'll be fine. Just relax~"

Tia realised what Luna was doing. She was going to make her pass out on the damn thing! She was so panicked that she didn't even realise her tongue was eagerly worshiping the huge thing.

It took some time though not too much as Luna started to watch tia's eyes roll back "you're out of shape sister. Three minutes is pathetic." She insulted as her sisters mind hazed over. "But don't worry. Your lovely lord will keep you busy and get you back in shape. You see, this is a good thing for you!" She whispered and a moment later with yet another seed planted, tia passed out.

Luna rolled her eyes "not even enough time to finish what I was going to say. I think equestria will be much better with me at the helm instead of someone as pathetic as you" she said to herself before pulling back and using her unconscious sister's throat as a toy "at least you're good for something" she grunted as she humped tia's face.

Luna moaned as she hammered back and forth, holding onto her sister's horn for stability. It was only a matter of time now. She looked down at her perfect sister's face and smirked. A little mess would look wonderful.

Finally she could feel it build. She grit her teeth and held back as long as she could but- eventually she could no longer. She pulled out and moaned as she coated her sister's face and upper body in her seed. "That's it~"

The splash of cum and return of air slowly brought celestia back to the waking world. She gasped and looked around, only to squeak as some of the salty seed landed in her eyes.

"L-Luna! Ho-" she was cut off as done oof the cum landed in her mouth. She couldn't stop the moan that followed.

Luna grinned above her as she used tia's head as a cock holder "before you say anything sister just remember. You could have bit down at any time~" she teased before disappearing, leaving tia with the realization that there was so much she could have done. Magic, biting. But she did none. She didn't want to.

She gulped and got another mouthful of cum. Before she realised what she was doing she scraped two handfuls of cum off her breasts and drank it greedily. She couldn't help it. It tasted better than anything she'd ever had!

The next night Luna sat in her bed with a grin on her lips and cock in her hand. She could hear the footsteps already and a moment later, a knock at the door. It sounded like last night had been a success. "Come in sister"

Tia walked in, sheepish and sweating. She opened her mouth to speak but froze as she stared at Luna's cock. It looked so big. So tasty.

Luna rolled her eyes and used her magic to semi-gently spank tia, bringing her forward and back to reality.

"I...uhm... I was-" she stomped her hoof in annoyance with herself. "I want-" she bit her lip as her gaze went back to Luna's cock.

"You want cock. My cock." Luna grinned as she slowly stroked it, watching Tia's eyes follow her hand "you want it in your mouth. You want to taste it. It's nothing to be ashamed of. No one would blame you.

"I- well- Yes! Alright! You did this to me and now it was all I could think of all day!" Tia's shouted, only making Luna laugh as she stood up and walked over.

"Kneel" she ordered, when Tia looked confused she repeated herself "I said KNEEL, slut!" She commanded, using a hand to push her down so she was eye level with her prize.

"Worship me. Don't ask any questions and get to work. Just let your slutty instincts guide you." Said said with a smirk.

Celestia wanted to retort. To say something. But instead she found her lips busy kissing and sucking on Luna's sack. She didn't care anymore. She felt... right. She felt whole again.

"That's it. Worship your better. Know your place" Luna whispered with a moan "open your mouth and get it wet"

"Yes Luna" Tia timidly said as she moved back and dragged her tongue along the massive cock that'd taken her twice already.

"Mmm. Tell me. What do you like about it?" Luna asked as she slowly moved back towards her bed with tia greedily following on her knees

"it's so... so big. So thick and it tastes so good~!" Tia mumbled between her actions until Luna stopped her by yanking her mane back.

"Good girl. Now I want you to climb up and mount me. Show me you understand your place. Your role in life is my pleasure. Your throne is my cock"

Tia didn't hesitate as she quickly nodded abs scrambled onto Luna, quickly dropping herself onto the massive cock. Tia let out a scream of pleasure as she orgasmed right there. But this wasn't about her. It's about Luna. It's all about her.

Luna grinned as she laid back and watched her sister grind and ride her cock like a common whore. Luna had succeeded.

She reached up and pinched one of celestia's puffy nipples. "You know I think this would look good with some metal in it" she commented

"Whatever you want Luna" she panted as her hips moved like mad.

"Good girl" Luna said simply as she started to thrust in time with tia. "This is your place. Your my sister but your also my toy. My pet. Whatever I want you to be you'll happily do it" she ordered as she felt pressure building. "I am your master and you will obey me"

"Yes master!" Tia screamed, only to scream yet again as Luna dug her fangs deep into tia's neck and cum completely claimed her womb.

Luna grinned and licked the blood from her fangs as she looked down. "Perfect~" she cooed as she traced the copy of her cutie mark that had appeared on tia's belly. Proof that her sister would bare her foals.

Author's Note

Wrote this on my phone so that's why it's not quite as up to snuff as my usual

I wasn't happy with it so I added a bunch