The machine starts working and you can feel waves of pleasure ebbing through your body. The feelings are more intense in the region of your groins and demands all your willpower to not moan as loud as porn actress, still you let some girlish sounds occasionally.
Mia is on the pod right in front of you. She also seems to be immersed in an orgasmic feeling. However you can't keep yourself from spying her changes. Her clit is fully engorged, erect at 4 inches, quite impressive for the female anatomy, but weirdly it seems to be growing larger. Her member keeps on growing until it reaches almost 9 inches, it doesn't look like a clit anymore, but a thick veiny cock. Her slit closes into a scrotum and balls the were just squashed on each side of her pussy now hang lower in a full ballsack.
The device finally stops and you stumbles out of your pod with your legs weakened, barely able to stand as if you were having rough sex for hours. You look confused at Mia's impressive member, and a bit aroused as well. You look down at your own body, beyond your full breasts, focus in between your legs. There is nothing there, not even the small infant dick from before, you just feel a moistness. Under further inspection you notice a small pink button under a hood, just above a wet slit.
"Wow! That really is an impressive size. No wonder you were after your full set again!" Said Molly caressing Mia's large cock. "Bet you are eager to use it."
"Wait!" You manage to catch your breath and speak. "That cock is mine! You were supossed to give me balls!"
Molly looked suspiciously at Mia, who in return gave her an embarassed smile. She've been caugth red handed stealing someone's dick.
"Let me see..." Molly checks the information on her tablet for a few moments. "No. Everything checks up. There is no mistake here."
"What!" Is all you manage to say, while Mia can't seem to contain her happiness.
"The forms are about a full genital swap. It clearly discriminates who will get the male and the female organs. There is no room for misunderstanding, and you signed it multiple times."
"What! No! I want my cock back!" You protest.
"You don't have a penis, lady!" Molly refuses you. "Besides, look at this." She says cuping Mia's hard dick and heavy balls. "This is clearly a real cock! With you it wasn't even 2 inches. Leave it to someone who deserves it."
Molly doesn't even wait for your reply before raising her skirt and inserting Mias's dick. She looks at you smugly as if saying 'this is how real penis works', while Mia happily enjoys her first fuck, going balls deep as fast she can. You leave the room with tears filling your eyes realizing that you lost your dick forever.