(Not sure if to call this self pleasure or sex, but I’m sticking to the safe side.)
You woke up the next day feeling groggy, but relaxed and almost content. However something felt... off, very off but you felt the long slick tongue of your girlfriend stroke your face and you felt calm. Soon you open your eyes and see her face, but for some reason you feel large and bloated everywhere to the point of near immobility. You groaned rubbing your eyes and your girlfriend whispered,"Good morning sleepyhead," and giggled with a mischievous look on her face.
You smiled at her and kissed her, but when you looked down at yourself your eyes widened as you could see no signs of your human body. You shook yourself fully awake and you stared down shocked again as you only saw the dragoness’s blubbery body below your body. "Huh?!" You muttered in a voice similar to hers, and then you paused and covered your mouth then screamed, or rather roared, at the top of your lungs causing the room and air to vibrate.
Your girlfriend then shushed you by putting a claw over your mouth and smiled at you. "Calm now, you don’t wanna wake up the other creatures... yet anyways." She giggled and you cried,"W-What happened?!"
"Look a little closer, see and feel everything~" The dragoness replied sounding very pleased and you nodded then looked down and examined everything.
You again saw only the dragoness’s body, but you felt it as if it were your own. The large fat breasts, the tiny and insignificant wings and tail, every bit of blubbery fat, bowels, and finally the lack of a dick between your thunderous thighs. "I.... are we..... stuck together?" You asked
"Oh, so close, but not exactly, here let me help." She giggled and then you felt your bowels flex and you groaned as you let out a massive fart, and afterwards you felt satisfied by the rippling sensation of your fat and the release of the built up fumes.
The dragoness then gazed into your eyes and said,"We have become one and the same.... sister, and we look like identical twins on the same body. Now nobody can tear us apart... not that they’d get past me."
Upon hearing this you grew nervous and yapped,"W-Wait, b-but how does that work?!"
The dragoness leaned over and nuzzled your head and hugged it into hers then said,"Shhhh, it’s okay... this will still work out, I promise. I just wanted a way to make this better for the both of us, and now we’re the biggest, gassiest beast in the zoo. We’ll be fed together, sleep together, belch, fart, kiss, you name it and we’ll do it!"
You felt the arm on her side move without you even controlling it as she nuzzled you and smiled. You thought for a few minutes and you nodded to her and smiled and nuzzled her back. "I guess... so how does this work now that we’re.... together?" You asked
"Well, you have control over your half of my body, and I have control of this half. While for parts that are centered such as our pussy and bowels, we both control those together, and we can both be as magical as we want. However, how about you just let me do all of the fun spells since you’re still quite new at this?"
You nodded to your girlfriend/sister then proceeded to flex your toes, invisible below your fat stomach, and look at the clawed digits of your hand. You then laid back and sighed, relaxing yourself against the back wall of the cage, and the dragoness laughed at this and said,"Seems like you’re enjoying yourself."
You smiled a bit and nodded to her,"I...urp....." you let out a loud belch and a plume of smoke before you continued,"I’m coming around, but god.... I’ve never been a chick before, much less an obesely sexy one~" You spoke in a seductive voice and grinned, inching closer to the dragoness and she grinned back and nodded.
"Well, how about I show you the ropes then? Then when this gets bored we’ll find someone new to play with.... eventually." She murred and you smiled and nodded in agreement.
The two of you then came close and gave each other a large, sloppy kiss on the mouth. Your tongues proceeded to explore each other’s oral intakes, and you could taste the last meal your girlfriend devoured, and your forked tongue ficked out any chunks stuck between her teeth and down into the shared stomachs of your new body. This passion ignited a flame within the body you both shared and after the kiss was broken the two of you stared at each other and laughed.
"Mmmm~ whatever you ate last was delicious." You murred to your girlfriend and she smiled and said,"It was spicy, but I could take it. But I can’t wait to pick your teeth of whatever meal comes our way next."
Your stomach gurgled now and you giggled and said,"Speaking of spice." You grunted and let loose another earth-shattering fart and along with it you felt a few steamy logs push out of your shared rectum. The dragoness smiled as your large tail swayed from left to right on the ground and said,"I wouldn’t want to be the one who cleans up after us."
"Good thing we’re not the zookeepers, they have their work cut out for them." You giggled
"I love you!" The dragoness then said and you replied,"I know, and I love you too~"
The two of you kissed ove more time and wrapped your arms around each other’s side of the body as best you could attempt to hug each other. This lasted for a couple minutes until you both stopped and stared at each other once more and giggled.
"So, what shall we do now babe?" You asked her and she smiled at you.