As you walk in the door, you feel a prickling on your arms and legs as fine hair starts to grow on them, as you watch the hair grows thicker and the arms themselves become more muscular. Then you watched with extreme disquiet as your bust starts to shrink. You look inside your now loose dress as your breasts totally vanish to be replaced by a flat masculine torso. You realise that this is what you wanted. You feel your body start to grow larger and quickly take off your dress before it gets too tight.
Then you feel a stirring in your panties and pull them down to see what is happening there. Your clitoris is growing quite rapidly and is quickly turning into a penis. You run your hand under it and realise you cannot feel your vaginal opening anymore. Instead you feel two normal male testicles grow and descend.
You looked in the window and examine the new face you see reflected there, and realise that you are very handsome.
Your male genitals have finished developing and you reach down to feel them. It feels very strange to have all that dangly stuff between your legs. I wonder what it would feel like to have sex on the other side, You think. And an image of a woman you want to fuck appears in your mind, naked on a bed with her legs wide inviting you to take her. Your cock responds to your thoughts and rapidly grows to a full twelve inch erection.
Suddenly, the room spins. There's a bed there that there wasn't before. The girl from your fantasy is lying there, legs open wide. you can smell the musky scent of her cunt...