Improve them physically; then become an irresistible futa.

It's time to test your theory about physiologically, and anatomically, changing those you influenced.

“Cassy; gosh, you are so beautiful, and such a good lover, and I hope you know that – but don’t be arrogant! I want you to remain just as you are, in your everyday personality, and in your cute but ravenous role as my lover. Amy; you are gorgeous, and always have been, but I think your amazing personality and sexuality deserve even more. Your breasts will grow by two sizes, but will be even more perky and shapely than they already are. Your arms, legs and body will be slim and toned, regardless of whether you exercise or what you eat – but you’ll still want to exercise for the fun and clarity of mind it affords you (that applies to you too, Cassy). Your cheeks and face will lose just a little bit of their chubbiness, to be sleeker and more streamlined. You will grow a couple of inches vertically, but not horizontally, your legs getting slightly longer in proportion to your body. Neither of you will need to sleep any longer, though you can do it as before, and you're immune to all diseases and can heal from any injury in seconds [why not, you think]. Now that you freeze on my command, I no longer want you to freeze when receiving my cum. You'll both always have perfectly smooth, unblemished skin, soft, moist lips and mouth. Your pussies will always be wet when you are around me. I know that’s a lot of changes, but I know your diet supplies more than enough energy to enable it, and I want you to not even notice the changes as they happen, but only once your transformation is complete. Neither of you girls will ever notice or think anything is unusual if you see me cause someone to freeze in front of you, like you are now. Now, enjoy your orgasm Cassy! Unfreeze.”

With a start, Cassy screams at the top of her voice in glorious ecstasy, her body throbbing, her pussy pulsing furiously around your cock, until she collapses against the pillows, eyes closed as she processes the uninhibited pleasure that had overwhelmed her brain. Even Amy lets out a moan as she cums hard.

After just a few hours of intense sex, Amy's breasts are noticeably larger, and this success leads you to contemplate whether you could even enhance your own physique. You're fairly fit, and your cock certainly stretches out your girls, but the temptation to go further is so great. Besides, if you give yourself a huge cock, you can easily reprogram your girls to be able to take it.

The thought of having to have your own cum in your throat or ass is a little uncomfortable, but you're placated knowing it gives intense pleasure and tastes delicious. When you tell Amy and Cassy what you want to do, they jump on the idea with joy. Before you know it, they're both pleasuring your shaft simultaneously, tongues and lips caressing all over your erogenous centers whilst they fondle your balls and squeeze your ass. It doesn't take long before the intense stimulation sends you over the edge, and you cum all over their faces.

As soon as your spurting finishes, the girls immediately start devouring one another, insatiably licking one another's faces until they have collected every drop of your semen. As Cassy swallows, immediately orgasming with a scream, Amy slowly crawls up your body, feeling every inch of your skin as she seductively rises to your face. Finally, her emerald eyes meet yours, and she kisses you deeply. Her tongue ventures deep into your mouth; the taste of your product is just as fantastic as Amy had promised, and you have no trouble swallowing.

You're caught off guard by your own sudden orgasm, and the sensation of lips around your cock where there hadn't been an instant before. You look down to see Cassy swallowing load after load of your cum down her elegant throat, her crystal-blue eyes gazing adoringly up at you.

"Well?" you ask, as your orgasm finally subsides.

"I did what you asked, master," nods Amy. "You froze just like you said you would, and I read you the script you gave me."

You grin in nervous anticipation, as you wait for the changes to take effect. First, you feel your cock and balls grow to a simply absurd size, until your shaft is thicker than your hand can reach around, your glans could touch your sternum, and your balls are the size of grapefruit. Amy and Cassy eagerly seize your new equipment, servicing you with their hot mouths and hands - all of which feel and look very small compared to your massive cock.

Next you feel a curious sensation over your entire body. Looking down at your body, you see your body hair receding back beneath your skin, and in just seconds you are utterly hairless, except for your eyebrows and head hair. Your now-hairless skin also changes more subtly, most wrinkles and lines fading away, your skin growing smoother and softer by the second. Glancing in a mirror that Cassy brought down for you, you see your eyebrows thinning and arching into high curves above your eye sockets.

Then come the big changes. You shudder as you feel your bone structure changing, pelvis widening, shoulders narrowing, cheekbones rising, jaw narrowing; it feels like your bones are itchy, underneath your skin. Even your admittedly unattractive feet become well-shaped, with beautiful nails, and shrink several sizes. This is accompanied by changes to your musculature; you feel your arms and legs becoming thinner, but toned and strong. Your girlfriends stroke them appreciatively.

Just as your arms and legs are beginning to stop itching, your skin starts to crawl again, as your fat stores change. Your thighs lose most of their flab, becoming elegant but soft. Your waist shrinks drastically, until it forms an incredible hourglass with your hips and ribcage. Some parts of your body grow, however; your ass becomes larger and rounder, and when you grope it you find it is the perfect balance between firmness and softness. Your attention quickly turns to your chest as you feel it stirring, and you watch, mesmerised, as two large mounds sprout, carrying your nipples up with them. You feel both tits as they grow large in your hands, nipples growing harder and taller simultaneously, until you're looking down at two huge, gravity-defying orbs, soft but perky and really quite sensitive.

Finally, the piece de résistance: you feel a tightening between your new legs, and gasp with pleasure as you feel your skin inverting, burrowing up into your abdomen. As glands and nerve clusters grow, the pleasure only mounts to an unbearable level, until you cum, spurting huge ropes of semen from your giant cock, and feeling your new pussy oscillating wildly, juices gushing out of the new hole in your crotch.

When you finally come down off your high, you feel beneath your huge testes, to find an exquisitely sensitive nub of flesh easily accessible: your new clitoris, mere touches of your fingers making you aroused despite your recent orgasm.

It seems your body is finally finished rewriting itself, and you stride over to a full-length mirror to take yourself in.

You're an absolute knockout.

Long, perfect legs are adorned with two great balls and a huge shaft. Your midriff is toned, its narrowness emphasising the shape of your womanly hips. Your breasts steal the show, beautiful globes that aren't obscenely large, but defy gravity with their great size and perkiness. Finally, your face is almost unrecognizable - and fuck, is it hot. Seductive red lips, slightly parted; pristine cheeks, flushed pink; bright purple eyes - those you didn't ask for, you suppose they must just be a side-effect, an indicator of your alpha nature. And you must also have missed your hair growing, because now it cascades down to your waist, in shiny, luscious waves. You're not quite sure what colour your locks are: one moment you think you're a brunette, but the light shifts and your hair seems a deep scarlet. The instant you step back into shadow, however, it becomes a glossy midnight-black.

You've transformed into your fantasy: a hermaphrodite, or futanari. You've enhanced everything you could think of - stamina, libido, healing, strength despite your elegant build, and vastly increased magnitude of your pheromone powers. Not that you wouldn't get what you desire without them - you're the sexiest, most beautiful creature on the planet.

"I feel like I'm gonna cum just looking at you, baby" drawls Amy, looping an arm over your shoulder. "Will you let us explore your new body, Michael?"

You frown. "Maybe. But Michael isn't my name any longer. I'm Mikaela, your girlfriend."

Cassy takes your other shoulder, rubbing her tits against your lithe body. "Yes, Mikaela. Thank you, Mikaela," they chorus.