"This is not fair" Nightmare said as she looked down between them "I AM the true mistress of the night! I should be...I should be-"

"Yeah, yeah, yeah. Whatever. The facts disagree though" Luna said with a smirk as she stepped forward, pressing her cock and balls against Nightmare's smaller ones. "You may be taller, you may be all big and scary but "I" am the matron of fertility" She said with a smirk.

"Hmph. Those heavy balls of yours will just sag" Nightmare said defiently, though didn't move away. In fact she didn't notice her hips slightly moving

"They haven't after all these centuries. But even if they do, I like to think ponies will like the extra pendulum movement before it smacks against them." She said as her horn lit, wrapping around their shafts "Mmm~ That feels nice~"

"Wha- G-get your magic off of me!" She shouted before unwillingly letting out a small groan of pleasure.

"I don't think you really want that" Luna said with a smirk as she started thrusting herself against Nightmare, pre dribbling from their tips, lubing them up. "But You've never been good at admitting what you need. Whether it be help, a friend or ...this~. But I've been here for you. I always will be" She said with a smile before leaning forward, pulling her once alternate form into a kiss.

"Mph~!" Nightmare moaned out at the kiss, a part of her tried to push Luna away but it was barely an effort. A moment later she gasped as her cock spasmed, spashing the underside her her large breasts and Luna's smaller ones.

"Oh! Oh, my~ Such a quick shot" Luna teased, utterly enjoying the look on Nightmare's face. "Oh moony~ it's nothing to be ashamed of. " She said as her magic let go of her shaft, now only gently stroking Moon's as she started to move down, kissing and licking the body of the taller mare. "I'm here for you and you're here for me. You may act proud and grumpy but-" She took a long lick of the cum left on Nightmare "Mmm~ But I love you. Tia may only tolerate you but you are my one and only. The only pony who could and has ever understood me. Even if you went about helping the absoluete worse way possible" She teased before nuzzling her snout against moon's balls before taking a long, slow lick from them to the tip of her shaft "Mmm~ I'll help you out as much as you want. don't you worry. But, I expect your help in return~"

Nightmare couldn't believe this. In every other way this mare was smaller than her. height, ass, breasts, theighs, everything. But yet... The affection rolling off of her was almost overwhelming. It was actually making her blush. HER! The mistress of the night! But even then...This mare...she accepted her. Even after all the horrible things they had done when they were one. She accepted her back into her life. "F-fine. I suppose I can...do that." She grumbled

Luna smiled as she stood, licking her lips before kissing Moon "Thank you." She said before gently pushing Moon's head down, finally relenting on her magic grasp on Moon "So help me out~"

Moon grumbled at the start but lowered herself anyway. "You're not afraid I'm going to bite it off?" She asked with a smirk, showing her fangs as much as possible.

Luna simply shook her head as she pushed her cock against Moon's cheek. "No. I'm not. I trust you."

Moon grumbled as she felt her cheeks blush again. That damn mare. She'd become so soft after they separated. She felt the cock on her cheek. It was so hot. So hard. Her balls so heavy. Well at least she hadn't gotten soft everywhere.

Moon opened her mouth and let her long tongue wrap around Luna's shaft. She still tried to look grumpy, angry but...Luna's shaft just felt...right. She didn't wait long before she pulled it into her mouth and it only felt better. It was as if her mouth had been made for this. She unconsciously let out a moan as she started moving her head.

Luna let out a moan of her own to match, her hips moving softly to meet Moon's movements. "Oh. Oh that's it Moony~" She cooed. It felt amazing. Moon's mouth somehow felt warm but cold at the same time. It created a wonderful feeling, especially when paired with Moon's tongue moving all around her cock.

Luna kept moving. Starting to go faster and harder. Her hands gripped the sides of Nightmare's face, her balls beginning to slap against her chin with every thrust. "O-Oh Moony!" She called out, moaning out as she kept moving but...she wanted more.

Luna forced herself to pull out, panting as she looked down at the confused Nightmare who's tongue laid outside of her mouth. "More" She said simply as she used her magic to gently throw Nightmare onto the bed before climbing on top of her. There was little foreplay as she climbed on top but Nightmare offered no resistance. She even spread her legs. "I love you Moony"

Nightmare blushed and looked away slightly "Sh-shut uuuuuuup!" She shouted as she felt Luna's large shaft plunge itself into her. She squirmed and moaned as Luna pulled back, only to again slam in.

Luna stopped for just a moment to look at Nightmare beneath her. "You're beautiful" She said softly before moving down, laying on top of her, grinding Nightmare's cock against her stomach as she thrust and sucked at her nipples. "I- I want you. I want you to bare my foal" She grunted with a pant. "I need to breed you. I want to see you with a round belly. Please." Luna was barely hanging on. Her mind wanted to let go. To go nuts and breed her. But she held on. Prepared to pull out at any moment.

But Nightmare surprised her. She moaned out and looked back down at the mare on top of her. "F-FINE." She said with a pout "Do it then and h-hurry up!" She tried to stay indignant but the pleading look on Luna's face was just too...too cute. She couldn't say no. Besides...even though she wouldn't admit it, she wanted it too. She wanted to allow herself to accept the love Luna wanted to give. All of it. Every drop.

Luna's eyes widened as she leaned forward, kissing Nightmare deeply as her hips started to move like mad. Luna had left her long, just hard enough thrusts and had changed into breeding mode. Her thrusts were frantic, deep and hard. "YES! Thank you!" She shouted before kissing Nightmare again, her smaller tongue overpowering Nightmare's long, almost serpentine one.

Luna didn't last long once she started moving like that. Even Nightmare could feel it throb and swell inside her. She hated to admit just how excited she was. How much she had like this whole thing. Allowing Luna to have her way. To....submit to her.

A moment later her eyes widened as she felt a torrent of seed flood her insides. Her muscular abdomen even bulged out from the seed. She knew that Luna had the title of Matron of Fertility but this truly went to show just WHY she had it. There was no way anyone who took this wouldn't get pregnant.

Her filling felt like it took hours even if it was only minutes. She barely registered as Luna lifted one of her legs and moved around until they were both on their sides, Luna still deep inside as she used Nightmare as the little spoon. "Mmm~ This is...I like this" Luna said with a smile as she snuggled against Nightmare's strong back.

Nightmare's only response was a grunt, even as her tail betrayed her as it wrapped around Luna's.

As the two snuggled, allowing the night to pass, neither knew about who hid on the other side of the wall.

Celestia bit on her hoof as she felt yet another orgasm shock her body. Her small cock shuttering as she abused it. She hated herself for wanting to be in Nightmare's spot. to be under her sister's thumb. She wanted her seed inside her. She wanted her foal. She would give anything to be there, underneath her. Underneath both of them! She moaned as she felt herself harden again. It was going to be a long night.

Author's Note

So. This one was a bit sloppy. Sorry. But yeah. Hints Super sub tia at the end.

Sorry for the sloppiness.