You were in an interesting situation, and perhaps the most humiliating situation of your life. Your transformation was long and drawn out, your cheeks puffing up all around you to conceal your face, your eyes and nose sinking into your skin, and your mouth swelling to become a large purply fleshy pucker that dominated everything outside of your enormous cheeks. It was pretty clear that you had become an anus, and that you had retained your consciousness. You were extremely worried, and also disgusted, forced to release gas every so often and expel solid waste from your mouth... and the crack between your cheeks was incredibly sweaty. Your cheeks dominated your view apart from when they are spread to dump waste... or unfortunately for you when some large cock comes into view. You wished you could scream the first time, but gradually acclimated to the smell, the feeling, the taste... and it wasn't all just feces you expelled from your mouth so that at least made it somewhat better.
As for your master, or mistress in this case, she was a large chubby and very very plump hippo. Her breasts were at least the size of pumpkins from what you could tell, or guess since you rarely see much else besides your cheeks jiggling and rubbing against each other... or when they are forced to kiss you whenever your mistress sits. Anywho your mistress regarded herself as a goddess, and in fact she goes by many names all of which refer to the world as a whole, Mother Nature, Mother Earth, but the one she likes the most is Gaia. Gaia treated her body very well and rewarded others greatly who helped out with this... which is where you come in. At this point you are convinced that she has to be some sort of goddess, because on many occasions you've found her squatting down over a pair of hands and suddenly you vomit up large batches of fruits of various sizes and amounts. The fruits can range from anything and Gaia has claimed to control which fruits she expels through you, and you always noticed a trend that you always tended to shit out more fruits if the fruit itself is small. Your first experience of this was when you shat out two dozen apples, your next was when you had to force 5 watermelons out of your puffy gullet, and once you even shat out a pumpkin that you swear had to be the size of one of your cheeks... which considering Gaia weighs approximately two tons, with the extra weight coming from the combination of her breasts, which looked more human than hippo, her nice large gut, and of course... you. Whenever Gaia didn't expel fruit out of you, it was pretty much just normal excrement but with the addition of a large number of seeds. Your own opinion of Gaia is... mixed, and there are a number of pros and cons to your predicament you must admit all revolving around her.
On one hand, she is very much aware of your existence, and when she is alone she often talks to you, asking you questions despite your inability to answer, but for some reason she always seems to know exactly what you would say or how you felt in general. She always tried her best to clean your mouth, especially after you expel her actual body waste instead of just a fruit. She also likes having you massaged, and pampers you along with herself the most out of any part of your body. You especially like it when you take a nice long mud bath, have lotion rubbed on you or oil, or when you are just massaged in general. She also seemed very proud of you which comes with its own ups and downs in itself, and the good part of this is that she does her best to respect you as a person, or a person who happens to live as her ass.
However, on the other hand... Gaia representing nature and natural instincts means she also encourages reproduction. In recent times she has gathered a large number of followers, and encourages every one if them to love and respect each other, but also to choose mates... and if possible to form "mating circles," which were basically harems. If one would think this excluded Gaia herself they would be dead wrong, in fact Gaia has 3 husbands Gora, Jiko, and Hirl, as well as one wife Kala, all of which she holds dear to her heart... and intimately all of which were hippos. Going back to Gaia being proud of her ass having pros and cons in itself, one large con is that she encourages her husbands and wife to mate with each other and herself included, and what's more she encourages anal even more than traditional vaginal sex. You can't count the number of times your cheeks have been spread only for one of her husbands or her one wife to kiss, stroke, lick, or even stick their finger inside of you. You felt the same pleasure as Gaia did which was the only good thing about this, but you can never get used to how strange, weird, dirty, and violating it feels to be used for sex. If you could talk about this you wouldn't even get started with how conflicted it is to have one of Gaia's husbands stick their cocks in you, and each one you have memorized the taste of. You are very familiar with the stench of sex and the feeling of hot cum overflowing your mouth, and admittedly if you could still move then you would gag or vomit it all out whenever you could. Perhaps the conflicted feeling was the worst part about all of this, you were human, not some fat purple hippo's puckered asshole, you were male, not some repository for cum or a disposal for some woman's bodily waste... you want to hold onto hope that all of this would end one day, especially since you've been stuck like this for months and not years yet, although Gaia herself has pitied you for this and with a heavy heart urges you to accept it, even stating that if she was flexible enough to kiss you then she would, and that she would love to make you into one of her mates if she figured out how.
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Now you wake up taking in the stench of sex and sweating like you usually did in the bed within the temple Gaia had constructed using her magic and support from her followers. You felt a strong hand on your ass, most likely Hirl's since he was the most fit out of the group. Peering down however you saw the face of Kala who was hugging Gaia's legs and using your cheeks as a couple of huge cushions. It actually looked somewhat adorable, and Kala was always cute... then again you remembered you were just an anus so that sort of took away from the experience. Then you would feel a very wet and slimy liquid drip into the crevice of your ass crack and from what it looked like, it was definitely drool, and this was probably from Gora. Gora was the fatass in your mind, eats the most... check, messy and slobby... check, doesn't mind the smell of his own rancid farts.... well that was pretty much all hippos including Gaia... but check... though you do enjoy Gora to an extent since he was the most loving out of the three... at least outside of sex... and he was a big cuddle-bug for better or worse. Then there was Jiko... you already felt his fat sausage fingers gently stroking your pucker, prompting a soft moan from Gaia and you let out a silent toot as she started to wake up. Jiko... he was loving, and clearly the most romantic, most fatherly and prepared to have a kid... however he is a pervert, and is determined to impregnate Gaia... and he didn't shove his dick in you much, but loved teasing Gaia with you. Kala was the most wholesome and caring, and clearly she was your favorite of the four Gaia chose as mates. They were all at least fairly chubby as hippos should be, but that isn't much of a bad thing.
You then feel a gurgling and release a nice large fart from your mouth which causes the others to wake up, outside of Jiko who was clearly awake since he was toying with your face. Gaia would let out a nice large yawn before reaching down, scratching your cheek before feeling Jiko's hand stroking you and smiled,"Jiko you naughty boy, give poor Princess a break~ Gora already ravaged her enough don't you think~?"
It was true, Gora had the largest cock out of the three, and he took pride in it, you still tasted his seed in the back of your throat, and your mouth was sore too.
"Aww, okay, my goddess~ Is there anything I can do for you while these three awaken~?" Jiko asked to which Gaia smiled and replied,"Breakfast, you always are the best cook, out of our circle~"
"Of course~ Shall it be a big breakfast~?" Jiko replied and Gaia's stomach rumbled and she nodded.
You noted that Gaia had been eating a lot more as of recently, and you wondered if she was pregnant or not. You wanted to ask her so badly, but you couldn't open your mouth. You don't even know how long a hippo's gestation period is, but at least you aren't Gaia's pussy for when that rolls around.
Gaia reached down and rubbed your cheek which was her way of telling you she understood you or got the message, and Hirl helped Gaia up into a seated position against his chest as Gora moved beside her and Kala sat on Gora's lap.
"What are our plans to do today?" Kala asked as her small tail wagged.
Gora just yawned before lifting his leg and letting out a mean fart, and chuckling before Hirl rolled his eyes at that and said,"Gora is that necessary now? We are in bed not the mud pits... please tell me it wasn't wet."
"Nah... calm down Hirl, I know my limits, don't I Gaia~?" Gora replied before kissing Gaia's cheek, meanwhile your face if flattened against Hirl's musky thighs, and you could smell the stench coming off his crotch.
"Now now, you three just calm down, not everyday needs to be an adventure. That being said allow me to wake myself up and clean off. You boys did a number on poor princess, I can tell," Gaia replied and Kala and Hirl nodded, while Gora yawned before standing up,"Gotta do my morning business anyways, after I'm done with that I'll be sure to be your big fat cuddly hubby all day long."
"And that's why I love you Gora," Gaia replied before kissing her remaining three lovers before they all left her in the large luxury suite of a bedroom. After this she stood up and turned you towards a mirror, spreading your cheeks and lifting her tail just enough so you could see your reflection.
"I am pregnant Princess, but no need to worry, I will be needing you more often as you may imagine but that is a good thing for your sake if you wish to accept your situation...." Gaia replied which made you somewhat worried and a bit sad.
Gaia then sighed and patted your cheek, rubbing it before pausing,"Now then, I may or may not have a surprise for you missy, so perk up!" Gaia stated which caught you off guard and after this Gaia forced a nice loud fart out of your mouth and you felt her relief from it wash over you as she inhaled the stench.
"There we go, now for your surprise, hold still like a good girl, and mama will grant you a gift...." She then walks over to a vanity and you grew increasingly confused but then you see Gaia's hand which was odd since you only were used to feeling two fingers. Then suddenly...