The water laps gently around your midriff while your girlfriend Sylvia draws your head down for a kiss. The tingling begins on your submerged flesh, then spreads up your torso to your head and arms; but you don't really notice it, your attention on the beauty in your arms. Your left hand sinking into her plush rear. The long silky strands of her hair sliding through the stroking fingers of your right hand. Her naked breasts pushing into your solid chest. And your hard cock pulsing between your stomachs, the little waves teasing at your glans as it peeks above them.
But while your desire for your girl grows, you feel no rush, content for the moment just to feel her body against yours. For the tingling to settle in your crotch and chest, mistaking it for arousal. Or maybe it is arousal, for it blossoms into a gentle, sensual warmth as a coat of orange-red fur grows out lushly on your body, darkening to black on your lower legs and arms, and fading to white on your front. Beneath the smooth fur your skin grows more supple, like your girlfriend's.
"Mmm," she moans lightly into your mouth as she feels the changes seep into her, gifting her a coat redder than yours, contrasting with her yellow hair.
The warm water continues to massage you, relaxing you as your heels begin to lift and your toes plump out and grow pads and claws. Sculpting your legs and butt into a powerful, feminine mix of lean muscle and cushiony fat; thick and firm and lusciously curved. Sylvia wiggles her hips lightly as they swell out a bit more too, her ass and thighs expanding slowly to keep pace with your rapid change.
The height you gain from becoming digitigrade begins to even out as the changes move up your torso, curving your spine and drawing your shoulders together; pushing your chest into your girlfriend's bosom as it becomes narrower, softer, fuller. At the same time, your tailbone pops softly free, sliding out into the water, lush red-orange fur sprouting along it.
You inhale sharply as your nipples, larger now and growing stiff, rub against Sylvie's, and you break the kiss in confusion as your mind finally registers the new sensations.
"Something wrong, hun?" she asks, her purring voice more seductive than concerned. You stare a moment into her eyes -- the green now flecked with yellow, the pupils tapering slightly -- unaware that your own irises, once grey, have become gold. Then you feel a gentle inwards tug at your privates, and drop your eyes.
"Ahhh, what's happening... ohhhhh..." You get but a glimpse of your modest but deepening cleavage before you tilt your head back and squeeze your eyes shut in pleasure, your grip on Sylvia tightening, pulling her into you even as your sensitivity spikes. You feel your hard-on shrinkng back from the vice of your bellies, compressing and sinking into your groin until it is just a super-sensitive little bundle of throbbing nerves.
Meanwhile your ballsack is resorbed into a smooth, white-furred mound which is quickly parted by soft, plump vertical lips. The soothing water flows into the opening, caressing the insides of your vagina, lightly pressing against your hymen. Your balls burrow up into you and separate, morphing into ovaries; and the passage they leave behind expands into a womb, fertile and achingly empty, the magic water kissing the entrance to your new inner chamber.
You shudder against Sylvie, feeling strange orgasmic pressure suffuse out from your loins, urging you on to finish your transformation. Flexing your jaws a bit, you feel the tension in them release with a quiet, satisfying crack, letting them grow out into a narrow, elegant snout. Your long, thin tongue lolls out over sharp teeth, your nose turns brown and damp, taking in the scent of the sea, the hot sand, and two wet female foxes.
Your ears pop, the canals shifting as they move higher up your skull, leaving you with sharper hearing as the delicate, black-furred triangles swivel to pick up the cries of gulls and distant people.
Your hair and tail both surge out; long black locks falling down to pool on the surface of the water around your waist, your brush fluffing out large and long to a white tip, wagging beneath the surface.
"Ohhh Sylvieeeeee!" you half-groan, half-sigh; your voice higher, breathier as you hug her, your body now as soft and pliant, as lithe and foxy as hers. Feeling the strange, wonderful sensations as you press together: your breasts and hers both now grown to full double-Ds, squishing against each other, the large, hard nipples grinding into the mammary tissue; brief jolts of delight when your clit is teased by the satiny fur of her mound or the hot folds of her own womanhood, replacing the solid hardness of your cock.
"It feels so goooood...!" Your voice breaks into a long, husky moan as your changes climax, a small orgasm quaking your female frame as the new sensations overload your male mind. You melt into your lover's arms, catching your breath.
Now almost as tall as you -- gaining an inch to stand 5'9" while you have lost a couple to drop to 5'10" -- her athletic body has also gained muscle as well as curves with the vulpine change. So, buoyed as you are by the enchanted water, she has no trouble supporting you. Although the transformation was less intense for her, as she is used to being female, it has left her quite horny; but she defers her own needs until you recover, gently petting your hair down your back.
"Well, 'surprise' I guess?" She giggles a little as she holds you, amused but also a little rueful. "This isn't what I expected to happen -- I've been coming here for about a year, and just thought it turned humans into hot sexy fox people. I didn't think it would make you a vixen specifically." She pauses.
"Oh," is all you can manage. A vixen...? You stand up again, letting your weight rest on your paw-feet, and look down at yourself. Yup, that checks out -- big breasts, orange and white fur; over your shoulder you see an equally large ass and your luxuriant tail gently waving, rippling the surface as the water drags against it. All feeling as alien and as sexy as they look.
"So, you do seem to like it?" she continues, hopeful. "I am a bit disappointed myself, since I wanted -- mmmph!"
Your hungry jaws silence her as they close over her muzzle, your more dexterous tongue eager for a taste of your foxy girlfriend's mouth. The passionate kiss lasts several minutes while you continue to calm down, adjusting to your new body, relishing the erotic weight on your chest, the delicious feeling of emptiness between your legs and inside you.
The sunlight shimmers on the pool, the ripples reflecting on your flamboyant coats. Two vixens relaxing into a loving embrace; one orangish red with blond hair, one reddish orange with black hair; both equally elegant and voluptuous. Both equally loving themselves and each other.
Minutes pass, the sounds of the public beach distant, letting you enjoy your mate and acclimate to your new self. But finally your muzzles part, and you open your eyes to gaze into hers.