>You lay with Fluttershy on your bed, lazily stroking through her mane as the fireplace crackles and pops.
>It is snowing outside and you’d been curled up all morning.
>Neither of you had anything to do today, nor did you have any desire to.
>She hums contently as you trace your fingers down her neck and massage her through her thick fur.
>She rolls over onto her back and lays her head in your bare abdomen, her body sprawled between your legs.
>From your position of advantage leaning against the backboard you get a glimpse of some beautiful scenery.
>Her fat teats sag ever so slightly to the side as if to spread apart just to give you a view down her sheath.
>From your angle you can barely make out her cock head in the bottom of the dark pocket.
>Just beneath her leathery sheath sits two massive testicles—easily the size of grapefruits.
>They were abnormally large looking for her smaller frame, and she was pretty embarrassed to haul the sagging nuts around in public.
>But in private she bared her all to you without a second thought.
>It also helped that you emptied them on a regular basis.
>And unlike you, there was a distinct decrease in size after she nutted.
>Actually nutting doesn’t really do the action justice…she pretty much becomes a cum geyser.
>She’d told you once before after a particularly delayed session of intercourse that her penis actually hurt a bit when she came due to the fact that her urethra wasn’t big enough to empty her balls fast enough. 
>It obviously wasn’t enough to overcome her overwhelming pleasure, but it was still an incentive to empty her more often to avoid the problem.
>You spread your hands through the thinner fur of her belly and she coos.
>She always liked belly rubs.
>You massage her pudgy stomach for a bit and she kicks off the rest of the blanket that was covering her hind legs.
>The wood burning fireplace was heating up the room pretty damn quick.
>It must be at least 80 degrees.
>”Getting a bit warm Flutters?”
“Yes, it’s really nice. I’m glad we’re not outside.”
>You look out you window and see only horizontal white streaks.
>Her cottage creaks a bit from the wind pressure, but it does absolutely nothing to your warm air.
>She closes her eyes and tries to cross her hind legs.
>But her fat testes keep them from closing comfortably.
>She scissors her legs a bit to try and work them free to no avail.
>In the quiet room you can actually hear the sacks slosh softly with fluid.
>You reach down and palm one of the testes—lifting it out of the way for her.
>But once you do so the other one slips down to take its place.
>Your other hand reaches around to gently grasp the other one.
>In your less than perfect grip the fluid sack shifts within her naked pink skin and falls back into her closed legs.
>”Dangit!”
>Fluttershy giggles.
>After a shift in position you’re able to get your hand under the sweaty nut and pull it up over her abdomen. 
>Finally clear of obstruction, she crosses her legs and sighs comfortably.
>You lay the gonads back down and watch them pool out across her geography. 
>How could they be that big? She just got done fucking you last night?
>And that was only seven or eight hours ago.
>Her semen was still a bit damp on the sheets and it laced the pillow you slept on in long, dark streaks.
>It matted up her hair as well as yours, and the thick smell of sperm still sat heavy in the room.
>You really need to be more careful about where she shoots off.
>You go back to massaging her chest and withers.
>The sweet-spicy smell of her ball musk on your hands wafts up to your nose.
>She didn’t shower as often as most ponies but her body odor wasn’t bad, in fact it smelled quite nice.
>Even when she did shower she never touched her privates with soap. She’d explained how it was bad for mucosal membranes to get soapy. 
>The result was a potent musk that followed her around everywhere.
>It wasn’t uncommon for her to lay down and read a book while you sniffed her and jacked off.
“Anon…”
>”Hmm?”
“Are you still sore from last night?”
>The concern was apparent in her voice.
>She wasn’t particularly large, but the it still burns when the lube wears off.
>”No dear. I’m good.”
“Are you sure? Because the last thing I want to do when making love is to hurt you…”
>She almost sounds remorseful.
>”Listen Flutters, I love you, and I love making love with you. The pleasure of that is greater than any pain…ok?”
>She nods and seems to understand.
>You both lay there in silence for a little bit longer until she musters the courage to speak again.
“S-so…can we have sex again?”
>You peek an eye open and peer down at her.
>Her glistening red cock head pokes from her sheath in mild arousal before sinking back.
>”I was wondering when you’d ask that.” You say with a grin.
>She blushes and tucks her ears.
>You lean over and meet her in an upside down kiss, ending with a raw mouth licking.
>You quickly move out from under her and she takes your place lounging against the backboard.
>Slowly, you move into her. Your already naked form moves between her hind legs as you get hard.
“You first.”
>Fair enough.
>You eye your target and lay your meat down between her hefty testicles. 
>She giggles a bit and spits down to lube the area up for you.
>With extreme caution, you cup her nuts around your shaft and massage it between them.
>She trusted you with her precious jewels and you made damn sure you didn’t hurt her.
>You thrust for a few dozen short seconds before you climax.
>You quickly release her balls and shift forward to jam your tip in her sheath.
>You cum in her sheath harder than you have in a while.
>Although you enjoyed it, it wasn’t done strictly for your own pleasure, lubricant was very important for what was about to happen next.
>You finish, leaving her sheath brimming with semen.
>Then you move to straddle her, and unceremoniously sit down on her sheath nub. 
>Your own testes smash between her teats and your semen leaks from her as you rock to position the opening of her sheath right under your anus.
>Once you find it you both let out a small grunt as you hump on her.
>The feeling seems to scratch at a familiar itch between your ass cheeks.
>The feeling of wanting to be penetrated by your love.
>It doesn’t take long for her to start extending.
>You feel the bulge grow with blood pressure and the opening of her sheath stretches to pass her cum-slick cock.
>The nerve-saturated shaft immediately enters your loose anus and continues it’s growth inside your body.
>Her eyes roll back as her head spins with the incredible sensation of achieving full mast inside a wet and loving environment while coated in your product.
>The growing girth stretches you just the right amount and the giddy feeling of her ribbed glans flaring eight inches into your rectum makes you grin.
>Her hips jolt to bury her just a bit deeper and you feel her medial ring pop past your inner sphincter.
>”Gah! You feel so good!”
>You curl down and clench on her shaft for emphasis. You did your best to pinch her off inside you but it only makes her harder.
“A-Anon…”
>You look up to see something in her loving eyes.
“Do you feel that?” 
>Her sultry voice is like music to your ears.
“Do you feel my hot naked cock inside you?”
>She rocks her hips ever so slightly and you hear a schlicking noise as her naturally lubed cock gyrates in you.
>”Agh! Y-yes!”
>Her fore hooves grab your hips and her wings shoot out in a display of dominance. Her voice comes back as a whisper.
“Did you know why mares have sheaths?”
>You shake your head at her while biting your lip at a particularly ticklish flare.
>Your own member twitches and flares—pushing out a bit more cum that gets rubbed into her teats.
“Because a mare’s cock is the most sensitive part of her, it has a very thin epidermis compared to the rest of her body. This means the nerve endings are almost completely unprotected. She needs to keep it safe in a warm, damp pocket so it doesn’t dry out or rub against things.”
>She rocks her wet cock around in you again, popping her medial ring past your second sphincter several times.
>She continues with her lesson. Undoubtably something she’d learned through her interest in nature and animals.
“I can feel every little wrinkle and bump in you Anon…” her cock holds a flex for a while and you grunt, “…Gh! For a mare to come unsheathed in her presence means she really trusts you…because it could be very painful if she’s mistreated.”
>You arch back to grasp her testes. The hard cock making a bulge in your belly.
“I know you won’t mistreat me now would you?”
>”N-no F-Flutters…”
“Good…then show me how much you love me.”
>You need no further coaxing to begin your rhythmic movements.
>Instead of hopping up and down you curl away from and back into her. That way you never had to fight the angle of her erection and make it less comfortable for her.
>Her hooves start putting some effort in and her hips start bucking as they work in conjunction to penetrate you.
>You knew she loved you, and you know she knows that, but right now all you want is for her to use you.
>You were there solely to pleasure her cock and the rest of her beautiful body.
>You throw everything you’ve got into it and ride her like the horny mare she is.
>It was really interesting to see her like this. She almost did a complete 180 from her normal attitude.
>Either way you really enjoyed her taking charge. It took all the annoying thinking out of it, all you had to do was listen and follow directions.
>The room fills with a cacophony of wet, meaty slaps as her hips ram you hard enough to slap her hefty, five pound balls against your tailbone.
>The rapid in and out motion becomes too difficult to keep pace with and you resort to holding her in a hug as she bucks wildly into you with her legs in the air.
“Mgh!…Eep!…Ngh!”
>Her features are a mixture of grimaces and smiles as she humps you to rub her cock around at just the right angle.
>You bring your lips to hers and kiss your mare exactly how she like it.
“Ggggh!”
>Her guttural grunt signifies a change in position.
>In a surprising show of strength, the nimble mare flips you over onto your back. Her red, inflamed cock nearly pulls out completely, but her flaring head wouldn’t pop past your clenching orifice without significantly more force.
>Once on your back she can’t resist the urge to jerk her hips forward and fuck you for a few moments.
>But that doesn’t last.
>She signals you to lay on your stomach and you comply.
“Aaaagh!” She cries as you twist around her cock and lay on your chest.
>Once prostrate, she takes up position standing above you. You feel her fore hooves land next to your armpits.
>Her warm, furry legs warm your thighs as she drops her hips and sinks her meat into your ass.
>The added friction of your butt cheeks made it incredibly pleasurable for her.
“Ngah! Anon!”
>She starts humping you with force and determination.
>At this point in the relationship there was no doubt as to who was the dominant one in bed.
>You figured it was because she had two sets of sex organs and thus twice the libido.
>Her needs came first and you were ok with that.
>Besides, she never, ever left you blue balled.
>Her pumping cock works up a froth of stringy, all natural lubricant.
>She never like the idea of using artificial lube.The same logic was behind her never using artificial sweetener in her tea, or store bought fertilizer in her gardens.
>Nature wouldn’t have made things the way they are if there was a better alternative she argued.
>And so far you haven’t found anything to contradict that.
“Goah! I’m going to fuck you until I cum!”
>Her sweet sing-song voice carried the harsh words with such passion that you almost cum again right there.
>A short fart escapes you as her ramming cock pushes out some of the air it brought with it.
>She doesn’t care though. In fact, you think she might like the way it vibrates around her, though she’d never admit to being that dirty.
>She fucks a few more farts out of you but all you hear is the sound of lovemaking.
>Her wings pulse in an instinctive dominant display as her body acts on its own to claim her mate.
>Historically, mares would fuck their partners in the middle of the village just to show everyone who they belonged to.
>Flutters would never be able to muster up the courage to do that, but you let her live out her little fantasy in the confines of your room.
>Finally she hilts and throbs.
>Her fore legs tremble and you hold them against you as she shakes on the brink of climax.
>Shaky breaths kiss your hair as her head suddenly swells.
>Then she pops.
>Hot cum squirts out of her with such force you actually feel it draw a line in your insides.
>”Uugh…”
>She bites down on your nape hard enough to get your attention and shoots another load.
>You can hear the unique sound of running fluid past her snorts…almost like water through a hose.
>Her balls shift and twitch in your butt crack as they deflate.
>You feel their contents pooling deep inside. It was similar to the feeling of drinking hot chocolate on an empty stomach, except better, because instead of hot chocolate it was Fluttershy’s sperm, and instead of your stomach it was your ass.
>She grunts and spurts again.
>You hear a very muffled *plop as her seed hits the surface of your inner cum resivoir. 
>And then she’s finished.
>She releases your neck and licks over the shallow teeth marks she’d made apologetically. 
>Her cock starts going limp, but it doesn’t really shrink.
>She collapses on your back and pants between licks.
>You lay that way for a while and enjoy the feeling of your mare owning you.
>You reach down and pull her bloodshot worm out of your ass.
>But you make sure to keep any cum from leaking, you wanted that inside you as long as possible…who knows, maybe someday it’ll give you a baby.
>You kiss her loving lips before kissing the naked, wet cock head that had made you feel so good.
>And just like that things were back to normal, the only difference being her plump balls were now wrinkly sacks and there were new cumstains everywhere.
>She lays her head on your abdomen and closes her eyes to the sound of the fireplace popping and crackling.
>It was going to be a long winter.