A pink light flashes across your body, starting with your head. You feel a itching, tickling sensation as your hair grows out, sliding down your neck. Your peripheral vision is slightly obscured by the long strands of your bangs. You fight an instinct to reach up and brush them out of the way with your right hand, which is currently touching the flashlight. Your face feels strange, and you realize it must be becoming more feminine. In particular you feel your nose shrink a little and your lips feel a little puffy as they fill out. The light moves down, making your neck slender and removing your Adam's apple before it narrows and softens the curve of your shoulders. Melissa takes time to run down each arm, slimming down your musculature and softening your skin. Your hands grow slender as well (she has you switch which one is touching the flashlight so you don't lose awareness), the fingers becoming dainty while the nails become clean and manicured. Quickly, she slides the light back up the arm to finalize changes there.
Melissa slows when she reaches your chest, pausing a little longer with the beam. You look down and see mounds form underneath your shirt, pressing your nipples into the fabric so you can watch as they grow with the mounds. The pink light continues to bathe your chest, and the mounds swell slowly until they begin rounding out into breasts. You shiver a bit as pleasure ripples through you, unsure if the pleasure is from the feel of your shirt against your new breasts or the trnsformation itself. But now you notice it's not just your breasts shifting against your shirt; your shirt itself is changing, morphing into a feminine cut that fits more closely against your changing body. The neckline inches down, revealing a slight cleavage that is forming as your breasts continue to fill out. Then the cleavage abruptly deepens as another piece of fabric morphs into place - a bra, the edge of its cups visible as you look down your own shirt. The cleavage had deepened when the bra constricted your breasts, pulling them together under your shirt.
You don't know much about specific sizes, but you'd guess you're at a C-cup when Melissa finally moves on. The light plays down your torso, slimming your body down and causing some shifting of internal orgasm. Meanwhile the shirt continues to change, cutting in on the sides to match your suddenly-narrowing waist. The bottom then flares out as your hips suddenly widen, and as Melissa aims the flashligh at your butt you feel the strange sensation of it swelling; it's like sitting on a cushion that is being inflated. Avoiding your crotch somehow, Melissa runs the light down each of your legs. your legs lose their hair and grow slimmer, although they maintain some slim musculature - which you can see clearly, because as the light passes the legs of your pants shrivel away until you are just wearing jean shorts. Your feet, although smaller once the light hits them, remain encased in tennis shoes - you were worried you would have to wear heels - although they do gain some pink coloration.
Finally Melissa brings the light back up to your crotch for the final change. Your shorts, which have already conformed to the shape of your new hips and butt, show clearly the large bulge of your package. As soon as the pink light sweeps over the bulge, it begins to shrink. Your balls are the first to go, the small round bulges quickly disappearing from the fabric. As they do, you can feel the skin part in a slit under what's left of your male organ, the skin rolling back into the folds that are the opening of your new pussy. Then the rod of your cock begins to shrink, and again you feel a shiver of pleasure. This time, though, it's even stronger than before, and you begin to breathe more heavily. The breathing turns to writhing when the pleasure builds as your shrinking cock slides into the top of your new pussy. What you don't realize is that the nerve endings in your shrinking organ are multiplying as it turns into a clitoris. The pleasure becomes overwhelming as the transformation finishes and your new clit tucks itself away, and you gasp and jerk slightly as an orgasm washes over your now-female body.