Author's Notes:

There are two versions of this chapter. One in which Diamond Tiara and Silver Spoon are younger than 18, which is the one published here on fimfic. The other in which DT and SS are 18, and can be found here:
https://pastebin.com/NVcqCXyW

You are Anon, laying in bed with Spitfire and Celestia snuggled up against you. Spitfire traces little spirals down your belly, closer and closer to your crotch. For the fifth time this evening, little Captain Anon stands to attention. Celestia giggles and reaches down to fondle your balls. You return the favor, burying your hands in their soft, thick thighs and rubbing circles on the hood of their clits. They squirm against you, and Spitfire grabs your cock with a skilled hand. Celestia gives your ballsack a gently squeeze.

"That reminds me, it has come to my attention that some of the students do not know how to swim. If you two could take care of that, I would appreciate it."

What about this reminds her of that? Spitfire pushes herself up onto your chest, her tits soft and warm against your skin. She begins to suck on one of Celestia's nipples.

"Uh, sure thing. I don't mind coming in on a Saturday, if that is convenient for the kids."

Celestia drapes a leg across your own, hips rolling as she humps your hand.

"That would be perfect."

Spitfire pauses in her suckling and looks up at you.

"We'll need to split up when the boys and girls are scheduled to learn. It's already embarrassing for them, no need to make it worse by having the opposite sex watch."

You nod, and pump two fingers inside of her. She practically purrs, nuzzling against your chest.

"I'll take the girls this coming Saturday, you take the boys the one after?"

Spitfire pants as you feel her approach yet another orgasm.

"Ye-hes, sounds, mmm, like a plan."

Celestia lets go of your balls and pushes two fingers into Spitfire's mouth. She sucks greedily on them, moaning in pleasure. Her thighs trap your hand as she climaxes, shuddering on top of you. Spent, she rolls off to your side. Celestia licks your cheek.

"I'm glad that's settled. Since it looks like Spitfire is done for now..."

She straddles your lap, her pussy a tantalizing inch above your erection.

"This next load is all mine."

With that, she spears herself on your cock, crying out in pleasure. You groan, the amount of stimulation your dick is getting is almost painful. You grab her arms and pull her down for a kiss. Her lips are soft and warm, parting eagerly to accept your affection. Her long hair falls around your head, and in that moment there is nothing but you and her, her impressive breasts pressed against your chest, her writhing pussy milking your cock. Your hips move by themselves, matching her rhythm as you thrust again and again into her hot, wet depths. Celestia's tongue is playful in your mouth, flicking at twisting against your tongue. Suddenly, you hear the sound of fleshy slap. Celestia jolts, tightening around your dick. She breaks the kiss to give a smug Spitfire an unamused look.

"Well? Keep going."

Spitefire salutes.

"Yes boss."

The next spanking has Celestia quivering and moaning on top of you. You cup her cheek gently, and push your thumb into her mouth. She leans into your touch and sucks on your thumb with a blissful expression. In contrast, her frantic humping is sending waves of pleasure surging and cresting within you. Each slap has her clamp down on you, milking you cock for all its worth. You don't know if you can take much more of this . Luckily, you don't have to. You hear a particularly loud slap, and Celestia collapses. Her pussy spasms and writhes, pushing you over the edge. You instinctively thrust as deep as possible as you twitch and fire within her. Celestia moans, grinding her hips against yours as you pump her full of your cum. As the two of you come down from your mutual orgasm, you stroke her hair as she lays her head on your chest. Spitfire flops back down beside you, and grabs your arm to cuddle with. You sigh contentedly.

"Good job, team."

The two women giggle, and nuzzle against you. Celestia reaches out and rests her hand on Spitfire's toned belly.

"Mind if I just sleep on top of him tonight? I'm finding it hard to want to move."

Spitfire pats her boss's ass fondly.

"I don't mind."

You raise an eyebrow.

"Don't I get a say in this?"

Celestia puts a finger on your lips.

"Shhh, pillows don't talk."

You chuckle.

"Fair enough."

You stand by the pool, the faint aroma of chlorine in the air. Diamond Tiara and Silver Spoon are a little surprising, but maybe they were sufficiently spoiled to avoid learning. Meanwhile, Trixie stands naked before you, arms on her hips and chest thrust out proudly.

...

"Trixie, you're a junior, how do you not know how to swim?"

She sniffs.

"The Voluptuous and Athletic Trixie knows how to swim, she was merely given a preemptive detention for disrupting class."

You rub your face, and the two freshman girls giggle.

"Does this have anything to do with why you are naked?"

She nods sharply.

"I refuse to conceal my Perky and Toned body when swimming. Coach Spitfire claims the Thick and Bountiful Trixie excites the boys too much, though no mere swimsuit would prevent that outcome."

What are you supposed to do about this? You just sigh, and turn to the freshman.

"So, do you have any particular difficulty with swimming, or is it just not knowing the motions well enough?"

The girls glance at each other, then Silver Spoon looks down at her feet. Diamond Tiara looks into your eyes and lifts her chin arrogantly.

"Swimming is beneath me, why should I have to paddle like a dog?"

You raise your eyebrows.

"So, if you found a more graceful way of swimming, you would learn how?"

She grimaces.

"If that even exists, yes."

You nod.

"I can work with that. How about you, Miss Spoon?"

The girl in question blushes, and mumbles something. You crouch down in front of her, and give her your best supportive smile.

"Could you repeat that?"

She licks her lips, but can't bring herself to speak. You hold her hands in yours.

"I'll help you no matter what it is, I promise."

She looks up at you, still blushing, but with a resolute expression.

"I'm afraid of drowning."

You smile reassuringly.

"We'll defeat that fear together."

With a grunt, you stand up.

"Alright, here's what we'll do. Trixie and I will demonstrate different strokes for Ms. Tiara. Once you see one you like,"

You nod to the girl in question.

"Trixie can teach it to you, while I ease Ms. Spoon into things."

Trixie's gaze flickers between your face and the obvious bulge in your swimming trunks.

"Are you sure there is nothing the Tight and Ready Trixie can help you with first?"

You shake your head.

"Not right now. Come on, let's swim."

She pouts, but follows you into the water. The indoor pool is warm, practically skin temperature, and you slip in easily. You start off with the breast stroke and swim the length of the pool a couple of times before switching to a new stroke. From time to time, you catch glimpses of Trixie's body. You have to admit, it's not like she doesn't have a reason to be vain.

"Mr. Anon!"

You stop, making your way to the side of the pool and climb out.

"Yes, Diamond?"

"I'll try the one where you swim on your side."

Trixie paddles over to the side of the pool, her mouth twisted in dissatisfaction. Her eyes are locked on to your obvious erection, the fabric of your swimming trunks concealing the finer details.

"The Wet and Skillful Trixie would like to relieve you, Mr. Anon. Will you not take responsibility for the sight of your boner?"

You turn an amused smirk on the girl.

"Am I disrupting your concentration? Well, that is inevitable, so you'll have to live with it until after the lesson."

She pouts.

"The Humble and Contrite Trixie is considering the error of her ways."

You chuckle.

"That's good to hear. If you teach Diamond Tiara well, I'll be sure to reward you to our mutual satisfaction."

Trixie salutes.

"Yes sir!"

You can't help but smile at her antics.

Two down. Silver Spoon fidgets as you turn towards her.

"Sorry for the wait. Are you comfortable enough with the ladder, or do you want to use the ramp?"

She straightens up and swallows.

"I can handle the ladder, i-if you hold me to keep me from falling."

You give her a nod.

"Then let's do that."

You jump back into the pool and turn to face the ladder on the shallow end. Silver clutches the metal pipes as she slowly backs towards the edge of the concrete. You lightly hold her sides as she takes one step down. Silver Spoon looks over her shoulder with a smile.

"Thanks."

You wink at her.

"You're welcome."

A few more steps, and her feet find the floor. She turns around and latches onto your arms, the waterline just barely covering her bust. You get a grip on her slender arms.

"Alright, I'm going to pull you, so go ahead and practice kicking your legs. Ready?"

Ms. Spoon swallows, then nods. You start off slow, gliding backwards. The girl huffs and puffs, thrashing the water behind her. You pull her more quickly to match her speed.

"Easy, easy. I've got you, just focus on how much you actually need to kick to move forward."

She blushes, and while her deathgrip on your arms never slackens, she relaxes enough to get the hang of kicking. Soon enough, she's ready for the next step. You place on hand on her belly, and the other on her sternum. You lift until she is horizontal, with her head still above the water.

"You were watching before, right? Let's try out the various strokes, so you can find one that's comfortable for you."

Silver Spoon nods, and begins to move her arms. She seems to be getting the hang of it, so you glance over to where Trixie is teaching Ms. Tiara. They are doing surprisingly well, you're glad they are taking this seriously. You return your attention to the girl on your hands, easily keeping pace with her movements. Despite how well she is doing, you can feel her breathing faster and faster.

"Hey let's take a break, alight?"

She slows to a stop and nods. You set her back onto her feet, but her knees give out almost immediately. She yelps, and you quickly grab her before she can sink. You chuckle as she clings to your chest.

"Sorry, I didn't think about how tired your legs must be."

Silver Spoon groans in embarrassment.

"Ugh, why do I have to be so lame?"

You tow her towards the stairs, sitting down on one of the steps. You set her on your lap.

"You're not lame, you're just learning. No one is perfect at the start, but you're making good progress."

She pouts, and you have to smile at that. You rub her back in calming circles.

"While we're here, how about you try putting your face underwater?"

Silver grimaces.

"Do I have to?"

You shrug.

"It's up to you, but might help conquer your fear if you have complete control and me watching."

She blushes, fidgeting on your lap.

"If you say so."

You smile reassuringly.

"Whenever you're ready."

Silver Spoon glances at you, then nods decisively. She takes a deep breath, then leans forward until her face is just below the water. Barely a second passes before she sits straight with a gasp, and frantically wipes water from her face. You pat her on the shoulder.

"That's a good first try."

Once she catches her breath, she looks at you.

"I'm going to try again."

You nod pleasantly.

"Keep at it."

She takes a few more breaths, settling down, then dips her face in the pool once more. Silver Spoon lasts longer this time, almost six seconds. When she surfaces, she is much calmer about wiping the water from her face.You keep up your campaign of head pats, back rubs, and half hugs, and she continues to make progress. She also does a lot of fidgeting in your lap that you are trying to ignore. By the time the swimming lesson is over, you are looking forward to rewarding Trixie as much as she is.

You shower in the men's locker room, washing off the chlorine smell. You hear the door creak open, and you can easily guess who it is. A nude Trixie approaches you meekly, her hands clasped before her and her arms pressing her breasts together.

"The Patient and Responsible Trixie is wondering if she was good enough for a reward?"

You beckon her closer, and she joins you under the spray of water.

"Do you think you'll wear a swimsuit for class?"

She glances down at your cock, and swallows.

"I think I know why I shouldn't distract the boys, now. I will wear a swimsuit next time."

You grab her by the hips and pull her close. She looks up at your hopefully, her hands resting on your chest.

"Sounds like you've learned your lesson. Now, how about we make it stick?"

Trixie begins to grin as she reaches down and guides your cock between her water-slick thighs.

"The Wet and Ready Trixie will strive to memorize this lesson."

You cock slips inside her, bathed in her arousal. Trixie hums in delight, wrapping her arms around your neck. You thrust into her, exulting in the sensation of her soft, slippery body pressed against yours. Your hands slide from her hips to her ass, kneading and spreading her delicious flesh. She moans, pulling herself up and wrapping her legs around your waist. You have to lean back to keep your balance. Trixie's hips roll and surge against you, sending waves of pleasure through you. Your fingers dig deep into her pliant butt cheeks as you lift her up. You kiss her mouth, your tongue easily gaining entry. She tastes sweet, with a hint of peanut butter. The girl hums happily, exploring your mouth in turn. You thrust again and again into her depths, inching ever closer to release. You take a few careful steps, and she gasps, breaking the kiss as the cold tiles of the wall touch her back. Trixie scowls up at you.

"A little warning, please?"

You give her ass an extra firm squeeze.

"Sorry, I wasn't thinking. Speaking of warnings, where do you want me to cum?"

Her legs tighten around you.

"Inside, of course!"

You chuckle, and resume pounding her pussy.

"As you wish."

You press into her against the wall, her body practically melting as she clings to you. She whimpers, showering your chest and neck with kisses. Trixie grinds against your pelvis, her inner walls worshiping your length. The air is thick with steam and the smell of sex. Your body is hot, from the heat of the shower, from the heat of exertion, and from the heat of desire. Trixie's eyes are clenched closed as she roils and writhes against you.

"Cum inside me, Mr. Anon! Fill me up! Give me everything you have, every last drop!"

All rational thought slips from your mind as you hear those words. You thrust into her with animal frenzy, answering the primal desire of her body with your own. Her legs tighten around you almost painfully, as you thrust as deep as you can. Your seed erupts inside of her, each pulse carrying the heat of the lust that has been building the entire morning. Trixie cries out in wonder, shuddering and quivering with pleasure. Gradually, she relaxes in the warm water raining down on you both. You set her down on her shaky legs, leaving a hand on her lower back to steady her. She rubs her cheeks, and chuckles.

"I don't think I'll have any trouble remembering my lesson now."

You can't help but laugh as well.

"I should hope not."

The two of you spend a few more minutes in the shower, washing off the remnants of your love making. All in all, a pretty successful day, you think