The centauress has decided that you will be her mate

As the two of you finish bathing, you try to figure out some way to tell Nyrella that you don't fully understand what she's asking of you. You might, might be misunderstanding her intent, after all. If you aren't, and she actually is intending some cross-species relationship, you might be able to talk her out of it, considering the, ah, physical incompatibilities between the two of you.

As the two of you finish bathing, Nyrella trots out of the stream ahead of you, water glistening on both her human and equine halves. You can't help but watch as she turns side-on to you, your mouth going dry at the sight of her pleasantly full, athletically sized breasts dripping with clean water. Shaking yourself out of your daze, you step out of the pool and begin drying yourself.

Before your scattered wits can formulate some way to bridge the clear cultural divide between the two of you, Nyrella turns towards you, hooves clip-clopping as she approaches. That familiar lecherous smirk on her lips, she pulls you into her arms and kisses you once again. Despite your misgivings, you can't help but wrap your arms around her in return, leaning into the kiss.

What's either an eternity or a moment later, she pulls back, her cheeks flushed and eyes sparkling with desire. "Now that we're all cleaned up, why don't we make this official, Alex?" Her voice is husky with desire as she pulls back from your embrace, trotting a few steps back from you.

You're mesmerized by the sight of her. From the waist up, she's the very image of the perfect warrior-woman: beautifully feminine, yet fierce and battle-scarred.

"After all, I promised you a ride, didn't I? And you damn well earned it, fair and square," she says to you, biting her lips. Movement underneath her body draws your eyes, and you are abruptly reminded of one of the reasons why the two of you simply won't work together. Dangling beneath the barrel of her equine lower body is her huge, throbbingly erect horse cock, twitching and pointing towards you.

For a horrified moment, you're afraid that she's going to break her promise and **** herself upon you.

Surprisingly, Nyrella instead turns away from you, her plump mare-like ass drawing your eyes, before her silky horse tail lifts out of the way to reveal her centauress womanhood to you.

You only saw glimpses of her pussy before, and now you find that you can't tear your eyes away. Her animalistic mare pussy is huge, dark lipped, and plump. It's also almost at your eye level, and is large enough that your whole arm would be a better fit for it than your manhood!

You stare, transfixed. You should say something, say that this simply won't work. Nyrella can see your traitorously erect dick, pointing right towards her. Surely, she can see that the two of you are incompatible? Instead, all she does is flare her cunt, the dark labia blooming open for a moment to reveal the deep pink interior of her inhuman pussy.

Her voice is teasing, yearning, as she gazes back at you. "Well, Alex? What are you waiting for?" Again, she flares her horse-like pussy open, thick dribbles of lubricant slowly dripping from it.

Swallowing, you stumble over your words. "Well, ahh, Nyrella, there's a slight issue of, well, physical differences between us. It's just-"

Seeming to understand your meaning, Nyrella blinks, before giving you a sheepish look. "Ahh, sorry, I should have realized." She then shows that she did not actually understand your meaning, as she trots over to a patch of soft looking grass and lies down. With her huge horse ass facing towards you, she again flips her tail up, that damnable sexy smirk on her face again. "Now you can reach me just fine. So, get over here and mate with me, stud!"

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Image Source: https://e621.net/posts/1899353

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With Nyrella lying down, you can see that if you knelt behind her, your member and her pussy would line up perfectly. As the musky scent of her horse twat wafts over you, you find yourself struggling to remember why you shouldn't just get behind her and fuck.

You shake your head to clear it, and nervously lick your lips. "Ahh, not to be rude Nyrella, but, well, I'm a human. With a human penis. I'm not quite sure that..." Words escape you, so you simply gesture at her massive horse pussy, and then at your own most definitely not horse-sized member. Your dick is average for a human, but compared to a centaur's cock, like what she's built to take? There's no comparison. Hells, you can see her big horse cock and huge centaur balls right there!

At your continued hesitance, Nyrella glares at you over her shoulder. "Here's a lesson for you, Alex: When a female presents herself to you and tells you to fuck her, you damn well shut the hell up and fuck her." To punctuate her statement, she flares her cunt open again, again flashing her sopping wet, pink interior at you. "Now, fuck me or I'll fuck you!"

Nervous and dry mouthed at the reminder of the large member trapped underneath Nyrella's belly, you realize that she truly is bound and determined that the two of you should have sex. Yet, for all your hesitation as you get on your knees behind the mass of Nyrella's huge rear, your cock is achingly hard.

Meeting Nyrella's intense gaze over the bulk of her equine lower body, you hesitate for a moment longer. Can you truly be upset about being semi-**** into having sex with a beautiful woman, even if she has quite a few extra pieces? Setting aside your doubts for the moment, you take hold of Nyrella's enormous, plump ass and thrust your member into her centauress cunt.

As she envelops you, you can't hold back a blissful groan. Her pussy is hot, wet, and the way her soft walls feel around your cock is simply amazing! She isn't exactly tight in the traditional sense, your cock easily slides around between the soft, meaty walls of her sex. But, there's this incredible feeling of suction as her centauress twat grips and milks your penis.

Why were you so hesitant about this, anyway? This feels amazing! Quickly, you settle into a rhythm, thrusting as hard and deep into Nyrella as you can. No need to be gentle, with how huge her pussy is and how wet she is, you're certain she can take anything you throw at her.

Slap, slap, slap.

Every time you thrust into her, you can feel her juices leaking from her cunt, trickling down both your balls and hers. When you thrust into the centaur hermaphrodite hard enough, you can hear the wet sound of your balls colliding with her thick mare twat.

Slap, slap, slap.

Gods, you can even see that her breasts are bouncing slightly from how hard you're fucking her. Considering how huge her body is, that's pretty damn impressive! You wish you could reach those soft, luscious tits, but you're at the wrong end of her body for that.

Slap, slap, slap.

As you really get into fucking Nyrella, words spill out of you. "Gods, this feels amazing. You're so wet, fuck!"

"Mhmm, yes, I do feel great, don't I? Don't be shy about getting a good feel of my rear, give it a good squeeze." The casual tone that she replies in partially snaps you out of your rutting frenzy. Looking up from her breasts, you really look at Nyrella, observing the expression on her face.

Slap, slap, slap.

Looking at her, you aren't really sure what the muscular centauress is getting out of having sex with you. Since you started fucking her, she's intently stared at you, a smirk on her face. Occasionally, she's pinched her nipples and groped her breasts, but aside from that, her flushed cheeks are the only sign that she's getting anything out of this at all.

Slap, slap, slap.

Whatever she's getting out of this, all you know is that you are getting close. As you continue to thrust into her, your breath begins to grow heavier, your orgasm getting closer by the moment. Nyrella notices this, and far from being disappointed in you, you can see her luscious lips part in a sudden grin.

Slap, slap, slap.

"Finish inside me," she demands. "Cum inside!"

Gritting your teeth, you groan, squeezing her huge centaur rump as hard as you can. You honestly don't think you could pull out of her now, her hot pussy is everything you've ever wanted!

Slap, slap, slap!

With a groan, you hilt yourself inside her, as deep as you can, and let go.

"Ahh, fuck! You're so good, Nyrella," you call out, unloading everything you have into her pussy, your balls throbbing as you cum as deeply as you can into her mare twat.

When your orgasm eventually ends, you slump forward over Nyrella's huge rump, a silly grin on your face as you meet her gaze.

The look she's giving you is at once smug and affectionate. "Pretty great, huh? Much better than some slip of a human girl, right?"

You can only nod tiredly in response, still trying to catch your breath.

With a self satisfied nod, she grins at you. "Glad you liked it, my Mate."