You checked off the option marked buttocks (full) and sealed your fate for the coming weekend. Handing the form back to Liz she looks it over and smiles when she sees what you wrote. "You are going to make Zoe so happy, you know that? She's going to have quite the hard time letting you go at the end of this."
"Is there any chance she will make this permanent?" Liz gets a serious look on her face. "Nope if she misses the deadline to change you back by more than a day then we file a missing persons report."
"Oh that's actually pretty serious." It shouldn't surprise you there's no way a business like this could operate without taking those precautions. "Is there anyway to make it permanent? Like with my consent?"
Liz's face softened a bit as she realized you weren't actually concerned with what Zoe might do to you. "Technically no, we do offer indefinite transfers but they still require the individual be transferred back annually to reconfirm they want to continue with that lifestyle so there's always technically an out."
Liz leads you down to a room where you find Zoe lying on a table while a tech hooks up an anesthetic for her. In a matter of seconds your soon to be host is knocked out cold. "Is it supposed to be painful?" you ask.
Anesthesiologist regards you as she sets up a mask for you as well. "The actual procedure can be extremely painful, yes but once you've woken up you should feel fine. Now count backwards from a hundred for me."
"100…99…98…97…"
*pfffttthhh*
"Oh fuck thats nasty." You awake suddenly to the vile taste invading your mouth, and an unholy smell assaulting your nostrils. You find that you can't move and are looking up at the drop tiled ceiling. You feel well the only way you could describe how you feel is plump, full, jiggly. Its then that you see Liz walk into view wrinkling her nose in disgust.
"Morning sleeping beauty, or should I say sleeping booty." She chuckles to herself. "Hey liz so I take it the procedure went well? I'm a butt now?"
"Yup, Zoe's still asleep though, here would you like to see yourself." Liz holds up a mirror. In it you see…an ass, Zoe's ass with just your eyes positioned under a particularly trashy Navi from Zelda tramp stamp betraying that you're here. You are officially the cellulite riddled and stretch marked fat ass of a transgender-trucker who calls herself "Big Mama." It's not like Zoe's Particularly Fat either yea a bit chubby but most of her weight was in well… you and it kind of made you proud.
"Liz, this is the sexiest I've ever looked. Holy shit" liz chuckled to herself. "I'm glad you're enjoying this so far. Here let me walk you through your transformation." Liz spread your… Zoe's cheeks to reveal the confines of her asscrack. In it you saw your lips now wrinkled and brown and with a few hairs sticking out of them but still in the shape of a mouth. Above them sat your nose positioned perfectly to sniff anything that might emerge from them.
"So obviously your lips are now Miss Albright's anus. But this means that your mouth is her rectum. Any of her waste will be collected there before waiting to be expelled." Right… her shit the nasty part of being an ass, well how bad could it be? You knew what you were getting into. "In those instances you will not be able to speak or open your mouth without Miss Albright first relieving herself… and as I said before she has to be the one to do so you function no differently than any other anus."
Liz then held up a cross-sectional diagram of a person's waste and pointed to one organ in particular. "Miss Albright is a trans-women which means she has a prostate. As you might be aware that means there is an erogenous zone now located in your mouth. If she were to have anal sex the orgasm would feel ten times as strong for you so be prepared for that possibility." Liz paused for a moment. Big Mama's not the type to do so without your consent you won't have to worry about that if you express your discomfort to her. If you are into it however, I'm sure she'd be more than happy to find someone to show you a good time."
Liz puts the diagram away and returns to you once more. "Any questions?"
None about the transference. Liz was quite good at her job and covered everything so well. But there was one thing nagging you. "You seem to know Zoe pretty well, why is that?" Liz was a bit taken aback by that line of questioning. "Well you've met titty right? She's my sister. She got me the job here back when she was a researcher. Big Mama's like family to me because of it."
"Oh wow I didn't realize sorry if I was too…*pffffttthhhh* Before you can even finish your thought, your sleeping host let loose another raunchy blast of ass gass out of your mouth causing Liz to back away and wretch in disgust. "Ugh gross, listen butt face we can pick this conversation back up next time you're in human form in the meantime I have to get some fresh air. Enjoy your weekend in her
Pants." Liz is out the door before you can say anything leaving you alone to stew in Zoe's farts.
They were gross… sulfuric and eggy and if you were able to you think you would puke. But for some reason you were so damn horny this woman just farted through you and there was nothing you could do about it. Fuck if you could mastrubate you would.
As the fumes slowly began to dissipate your host began to stir. Groggily pulling herself up...