"I'm home!" Twilight shouted as she burst through the door. "I'm so sorry I'm late, I was giving a demonstration and the lab kind of almost exploded, but everyone's okay!"
As she was explaining, she stripped off the blazer she wore when teaching at Canterlot University, tossing it onto a chair along with her purse. Vice Principal Luna looked up from her book, raising an eyebrow at the rush.
"I promise, I'll clean up as soon as I've gotten changed," Twilight added. "But if we're going out tonight then I've got to change fast. Is there something you wanted me to wear tonight?" She asked on her way into the bedroom.
Luna sighed and shook her head, following her younger girlfriend through into the room they shared.
"Welcome home, Twilight, how was work?"
"I mean, the scorch marks should scrub out easy enough, and nobody got hurt, so the paperwork can wait until Monday. I really am sorry I couldmmph!"
Luna had turned her bespectacled lover around, pulling her into a kiss, stroking the back of her hair as Twilight started to relax against her, humming softly into the contact.
“Now, let’s try this again,” Luna smiled as she pulled back. “Welcome home, Twilight, how was work?”
Twilight took a deep breath, letting it out and almost seeming to age in front of Luna's eyes.
"Exciting in the worst ways," she admitted. "Somebody spilled a bottle of ClF3 in the semiconductor lab.”
“Isn’t that…”
“One of the things on my ‘fire me, I’m not touching it’ list? Yeah,” Twilight sighed. “Because it burns sand like newspaper. But I had my geode with me to demonstrate the thaumic conversion potential and… well, let’s just say that I’ve finally discovered a safe way to handle the stuff - from the other side of the hallway while it burns out whatever fuel I couldn’t help but scoop up with it in a force bubble while the hood works overtime to keep the fumes from getting everywhere. It was… interesting! As are the things I’ll do to whoever spilled it, if I ever find out. But you don’t want to hear about that, I can get changed in-”
Luna pulled her in for another kiss, wrapping her arms around her this time to hold her close.
“I’m glad nobody was hurt,” she murmured, resting her chin on the top of Twilight’s head after the kiss ended. “And proud of you for handling the situation. And you're not in trouble for being late or anything like that, okay? Do you want to go out tonight?"
"It's Friday," Twilight pointed out.. "We always go out Fridays."
"That's not what I asked, kitten."
"I…. I'd rather not," Twilight admitted. "But I know you like to relax at the end of the week," she pointed out, "and I'm okay with that!"
Luna winced inwardly at the tension she felt in Twilight’s body. The poor girl was almost trembling, worried she'd be a disappointment, that she wouldn't be good enough.
"And I'm grateful - but I want you to relax and enjoy yourself too. I've been slacking as your Mistress." She held a finger up to stop Twilight’s protest. "I have been. So tonight, I want to know what you want me to be for you. Let me do this for you. If you want me to be the Mistress I've been lately, then that's fine, but I think we both know better after last weekend."
Twilight leaned her head against Luna's chest and closed her eyes. She listened to the older woman's heartbeat, steady and calming, and so much slower than her own felt right now.
"Can we just be together tonight? Just the two of us, here at home? I don't really feel up to it tonight."
"Of course," Luna smiled, stroking Twilight’s hair. "Why don't you change while I order some pizza? Something comfortable; I think tonight's a good one to just be us."
"Sounds good." Twilight leaned up on her toes, kissing Luna before she disappeared into their bedroom to change.
Two hours later, pizza finished, Twilight snuggled up against Luna’s side in her pajamas while they watched a movie.
“You know, it’s kind of funny,” she murmured. “We’ve spent decades trying to find life on other planets. This film’s almost twenty-five years old, and still pretty much accurate for how we’re doing it. Then a magical pony princess crosses over from another dimension on a high-school lawn and nobody notices for years.”
“You noticed.” Luna smiled and stroked Twilight’s hair gently. “And made a career out of harnessing an entirely new type of energy. And the rest of the world still doesn’t know about Equestria, just the magic from it.”
“Yeah… though I guess having SETI going around and probing random statues would be a little weird,” Twilight admitted.
“I’ve missed this side of you.” Luna wrapped an arm around Twilight, pressing into her. “We need to have nights like this more often.”
“I don’t know, I noticed you dozing off about a half-hour ago,” Twilight teased. “If I’d stuck in Solaris instead of Contact, we probably wouldn’t be having this conversation.”
“I just meant when we aren’t keeping up our usual routine. When we aren’t doing the Mistress and sub thing. Maybe we should quit the full-time thing, just do it when we’re both in the mood?”
Twilight tensed against Luna, and the expression in her eyes when she looked up said everything.
“I’m not trying to break up with you, or say I don’t want you as my sub any more,” she said quickly, hugging Twilight close. “I just thought it was stressing you out, that’s all. Like when you came home-”
“Sometimes it does,” Twilight sighed. She pressed her head against Luna’s ample bosom. “But most of the time, I like coming home and just letting you take things over for me.”
“Then I’m happy to keep doing that,” Luna smiled, scratching the back of Twilight’s neck. “I’ll never push my Kitten away. I love her too, after all.”
Twilight let out a little mewl and pressed into Luna’s touch.
“I’ll just try being better about telling you if I’m not feeling up to something,” Twilight promised. “Like tonight.”
“That’ll do.” Luna worked her fingers further down Twilight’s back, under her pajamas. She turned the scratching into a backrub as Twilight rolled her back up and into her fingertips, gently guiding the younger woman into her lap.
"How badly do you want to finish the movie?" She whispered into Twilight’s ear.
"Mmm… depends on what the interruption is." Twilight wiggled into her lover's lap, resting the back of her head against Luna's breasts and looking up at her. "I'm open to suggestions."
Luna wrapped her arms around Twilight’s abdomen, idly slipping a hand under her pajamas and tracing circles on her stomach.
"Well, I was thinking maybe I'd start out something like this…." She tipped her head down and lifted Twilight’s up until their lips met in a somewhat awkward kiss.
"Then that I might take you to bed, and see how long I can make you sing before you're too tired to keep playing?"
"Hmm… tonight, not nearly as long as either of us would like,” Twilight admitted. “But maybe a preview and we’ll try for the full production tomorrow?”
“Oh? Does my little Kitten want to come out to play tomorrow?” Luna kissed her again, then shifted her around to pick her up with a grunt. “Oof! Okay, next time, I do this from standing!”
“I can walk too, you know,” Twilight chided her. All the same, she wrapped her arms around Luna’s neck and leaned close to her ear. “And as much as I appreciate it, I prefer you flexible for tomorrow,” she whispered before giving a playful nip to the pale blue lobe in front of her.
“In that case, you can walk,” Luna agreed, setting Twilight down, giving the scientist a playful slap on the rump before following her into the bedroom.
Twilight was already stripping out of her pajamas, looking back over her shoulder at Luna as she did with a faint blush.
“I know you wanted to try being more vanilla tonight, but could you still tie me up? It’s been a nice break, but I’d like you to handle the decisions for a bit.”
Luna grinned wolfishly as she thought over the options - and how it would let her do exactly what she’d wanted to earlier.
“Gladly. Wrists and ankles, or just one of them?”
“Your choice.” Twilight slid her panties and PJ bottoms off, leaving her nude as she brushed her hair forward over her shoulder and knelt on the end of the bed, facing away from Luna as she crossed her wrists behind her.
Luna licked her lips, making up her mind quickly. She slid open the bottom drawer of their dresser, reaching under a concealing layer of linens to pull out a pair of padded leather cuffs and two silk sashes.
She draped her gear over Twilight’s ankles, letting her wonder exactly what was coming while she took the time to undress herself.
“Ugh,” she huffed as she unsnapped her bra, freeing the E-cup breasts it tried to tame during the day. “Sweetheart, I know you’re jealous of them sometimes, but until you invent an anti-gravity bra, I’m the one who really wishes we could switch some days.”
“I did that once, remember?” Twilight blushed at the memory. “As I remember, the end result was Pinkie not being able to see past them and Dash laughing herself sick at the pictures she took before we got it off.”
“I’ve got faith in you being able to dial it in better,” Luna teased, undressing the rest of the way and pressing up against Twilight’s back. “Like everything you put your mind to.” She picked up the cuffs, fastening the leather straps around Twilight’s wrists before she took the two sashes.
“Turn around,” she commanded. “I want you on your back tonight.”
Twilight lifted her lower legs, pivoting on the bed with grace that most of her old friends would have been shocked to see from her. She straightened her back, pushing her chest out in an unconscious attempt to make her a-cup breasts seem a bit bigger at least. Whatever her Mistress said, it was hard not to be keenly aware of every time her eyes strayed after somebody closer to her own ample size than Twilight’s handfuls.
“You’re beautiful, Twilight,” Luna praised her while she looped the sashes over her head and pulled her into a deep kiss. She pressed her tongue into Twilight’s mouth, tasting the faint remnants of dinner on her breath, slowly lowering Twilight’s back down to the bed. She pulled a few pillows down, leaving Twilight arched between the pillows under her shoulders and her knees up against the footboard of the massive bed.
“I want you to stay here while I get ready for the night,” she explained as she looped each sash around one of Twilight’s knees, spreading them wide to tie them off around the corners of the bed frame. For a moment, she considered adding a vibrator right over the dark purple patch of pubic hair that framed the already-damp lips of Twilight’s pussy, but decided against it.
Instead, she left Twilight whimpering on the bed while she headed into the bathroom to brush her teeth and strip her makeup. She made sure to leave the door open so she could listen for any sign that the discomfort of Twilight’s position was outweighing her enjoyment of the situation. Fortunately, the whimpers never crossed the line between ‘wanting attention’ and ‘wanting to be let go’ by the time Luna went back out to check how much her lover had squirmed.
Twilight was still in pretty much exactly the position Luna had left her, though the pillows under her had clearly been shifted out of position a little. On another night, it would have been a good excuse to have a little fun ‘punishing’ her, but Luna decided to ignore it.
“Good girl. Now, where was I…?” Luna made a show of tapping her chin, walking around the foot of the bed and licking her lips. “Ah, yes, ground rules for tonight: don’t hold back. Changing the sheets before bed will just mean I did things right.” The older woman grinned and climbed onto the bed next to Twilight, kissing the base of her neck.
“Yes Mistress,” Twilight murmured. The whimpering of a few minutes before was gone, replaced with the sound of their breathing, and the soft ‘smek’ of little kisses up Twilight’s jawline.
“I want you to close your eyes,” Luna continued, “and relax. Focus on the sound of my voice, and where I’m touching you. Everywhere I touch, everything I touch, is something I love about you.”
Twilight did as she was told, a long moment passing before she felt Luna’s fingers against her forehead.
“You’re one of the sweetest people I’ve ever met, Twilight,” Luna murmured. “Not just brilliant, but kind and always concerned for others before yourself. You didn’t let those bullies drive that out of you, and that’s the first thing I loved about you. You put so much of yourself into helping others.” A tender kiss against her forehead followed, and then Luna’s fingers tracing down her face.
“Of course, you’re also lovely. You’re every girl-next-door I’ve ever had a crush on, and those glasses of yours just make you even more adorable. Although without them….”
Luna took off Twilight’s glasses, the earpieces ‘clicking’ into place as she folded them up for the night. A light kiss ghosting against each of Twilight’s eyelids made her scrunch her face up, earning a playful laugh from her Mistress.
“You’re still stunning,” Luna continued. “And better still, you can’t see all the little downsides that come with dating a woman old enough to be your… well, aunt, I’d say, I don’t think I’m quite old enough to be your mother.” Twilight could hear the smirk in Luna’s voice, but still felt compelled to speak up.
“What downsides?” She countered. “You’re beautiful, Mistress; if I could return the favor, I’d show you just how much.”
“Ah-ah! Tonight’s about what I think is beautiful about you. Maybe tomorrow we’ll do the other way around.” Luna chuckled and moved on, kissing Twilight’s throat, making little circles on either side of her windpipe as she did.
“Your voice is gorgeous though. Did you know I still have some of your albums from your Rainboom days?” She chuckled deep in her throat as Twilight’s cheeks flushed a deep, almost bruise-colored purple. “I see you didn’t! We’re going to have to take a trip down memory lane some time. And I’ll bet you can still belt out that little tune Celestia heard you singing when you were taking care of her plants.” The blush deepened, and Luna decided to move on before Twilight proved if spontaneous combustion really was possible or not.
“And then there’s the part you’re most self-conscious of.” Luna clucked her tongue, leaning over Twilight’s body to trace her tongue around one nipple, her own breasts pressed against the other. “I never want you to think I’m not happy with you the way you are, Twilight. Besides, you being a bit smaller lets me do… this….”
Luna lavished attention on Twilight’s breasts with teeth, lips, and tongue, her other hand tracing down Twilight’s ever-so-slightly pudgy stomach to the cleft between her thighs. Twilight gasped as Luna finally touched her needy pussy, and her back arched into a perfect curve as she tried to press into the contact.
Luna smiled and bit down a bit, just enough to leave a reminder in the morning.
“Do you want me to move on?” She asked playfully. “Hmm… I suppose I should probably move down to your legs next….”
“Mistress,” Twilight mewled. “Please don’t tease me like this!”
“It’s only teasing if it isn’t true,” Luna countered. “Or do you mean like….” She slid her fingers down, the backs of her index and ring fingers parting the slick lips beneath them as she used the middle one to tease around the entrance to Twilight’s body, then back up the bright pink flesh to her throbbing clit.
Just before she touched it though, she stood up, her weight leaving the bed and Twilight crying out with disappointment.
“Like that!”
“Oh, we both know you love it. What was it called again? The pleasure principle? Pleasure delayed creates… tension?” Luna knelt at the end of the bed, licking her lips as she left Twilight wondering what was coming next.
“And when that tension is released….” Suddenly, Luna slipped her arms under Twilight’s bound knees, lifting her ass to the perfect height before diving into the soaked pussy waiting for her. She plunged her tongue into Twilight, savoring the bittersweet taste she’d come to adore over the past few years.
Twilight was a delightfully vocal partner as well; as soon as Luna began attacking her pussy, she was moaning and squirming and cutting loose in a number of languages with a stream of profanity and oaths that would have made some of the rudest parents Luna had ever dealt with blanch.
“Remember, don’t hold out on me!” Luna kept up her efforts, drinking Twilight’s juices down as the younger woman stiffened and writhed with one orgasm after another, soon wound up to the point where all she could do was desperately try to press into the pleasure her Mistress wanted her to feel.
Then, when Luna felt she’d had enough, she went in for the kill. She ran her tongue up Twilight’s slit, caught her clit between her lips, and hummed around the hypersensitive nub.
It wasn’t hard to tell that it had been the right move. As expressive as Twilight was during the buildup, when all that tension inside of her finally snapped she was almost silent. Luna had watched her face like this before; her body rigid, trembling like a leaf as all the stress and anxiety that sometimes seemed to be the glue that held Twilight together leaked out in a strangled, high-pitched cry of ecstasy. It had been terrifying the first time Luna had gotten Twilight to this point, but since then, she’d come to live for these moments.
And, more importantly, for the time that followed them.
When Twilight finally relaxed her body, panting hard above her, Luna untied her knees and helped ease her back so she was laying down on the bed more comfortably. Luna joined her, taking the cuffs off only to have Twilight take her by the cheeks and kiss her greedily, taking the taste of her own sex from Luna’s lips and tongue. She didn’t object, making out with her beloved and holding her close, just enjoying the feeling of having Twilight with her, beautiful, relaxed, unfettered. It was something she only ever came close to seeing when she peeked in on her during some project or other.
It was the Twilight she’d fallen in love with, and Luna never got enough of the feeling.
“God I needed that,” Twilight murmured tiredly when they’d finally both calmed down a bit. “Thank you.”
“Any time,” Luna purred, giving her a lazy kiss on her forehead. She moaned softly as Twilight’s hand worked its way up her body to cup one of her breasts.
“Your turn?” Twilight asked her, playing with one of her rigid nipples, bringing it up to her lips to suckle at it lightly.
“Ahn… you don’t have to.” Luna panted as Twilight switched breasts, suckling at one while massaging the other with skilled, deft fingers.
“I want to,” Twilight replied hungrily, moving back up Luna’s body to kiss her again. “Because I don’t have to,” she added, straddling one of Luna’s legs and shifting to rub their thighs against their soaking slits. “Besides, we’re going to have to change the sheets anyways - why not finish getting them dirty first?”
“You make a convincing argument, as always,” Luna grinned up at her. She let Twilight guide her into position, rolling up onto her side with her left leg in Twilight’s arm so they could get closer together. “Haven’t done this in a while,” she admitted, wriggling around a bit to find the right spot.
It was impossible to miss when she had. Pleasure shot up her spine as hot, slick flesh rubbed up against her, spreading her lips just enough to feel their most intimate flesh rubbing together. Twilight started gyrating her hips, kissing and nibbling at Luna’s leg as she quickly figured out the best spots to move.
“Same here,” she admitted. “Worth it though!”
Soon, she was working Luna’s slit like a pro, each of them gasping or moaning when the other stroked up against, or even near, their clits. While Twilight’s pubic hair was tightly trimmed into a patch above her pubic mound, Luna’s was more naturally cut back, leaving a thin layer of dark blue hair that prickled against Twilight’s skin with every movement, adding an extra sensation that she hadn’t tried before.
Before long, both women were on the edge, shifting their hips against each other while wet, slick sounds blended into their moans. Twilight reached down with her free hand to find one of Luna’s, their fingers entwining as Luna finally cried out, soaking Twilight’s leg with her juices. Twilight was quick to follow, shuddering through a smaller release of her own before she twisted down to snuggle up with Luna.
“Mmm… you’re right,” she panted. “We should do this sort of thing more often.”
“Once we’ve both gotten some sleep,” Luna chuckled, rubbing Twilight’s back and holding her close. “You want to grab the shower while I change the sheets?”
“How about I join you after I change them.” Twilight smiled, giving a gentle kiss on the lips. “Make sure you don’t miss a spot,” she added with a wink.
“Kitten, you are insatiable,” Luna laughed, shaking her head. “You go first though. I uhm… kind of need my leg to wake up,” she admitted, her cheeks flushing purple.
“I’m not in a hurry to let you go,” Twilight murmured, snuggling in close. "Happy to wait until then."
“And neither am I,” Luna admitted, closing her eyes to rest for a few minutes. Before long, they’d both managed to doze off. Sheets unchanged, covered in each other’s fluids, they still both slept better than either had in some time.
Author's Note
So, this is my (very last minute, admittedly) submission for the Summer Sin Celebration of 2021, dedicated to Brony-Wan Kenobi! I was asked for Equestria Girls, Twilight and Luna, and scissoring… so hopefully this satisfies! Particularly since trib isn’t exactly my strong suit, to say the least. 
My first idea actually played with having both pairs of Twilight and Luna meeting up to talk over some of the relationship and confidence issues that are referred to in this story, which is part of why it might feel a little like there’s stuff that happened before that isn’t super well explained. But then I realized that it was about 3-5k words in and they'd only barely started talking over the topic they were there to discuss, let alone gotten any of the smut in! 
With a soft word limit of 5k and hard of 8400. Yeeeeeeeah....
One of these days, maybe I’ll finish that one up and post it as a separate story. I still think there's material there (obviously), just not for this.
