Over the next few days, with plenty of free time and privacy, your shapeshifting GF and you went through a variety forms and mostly involved tons of sex. There was times you did other things as well, especially figuring out more intracacies of your forms, but mostly tons of sex.
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Your girlfriend was currently a naked, typical blonde bimbo, complete with a Valley Girl accent, and giving you a blow job. However, you were currently a male Chihuahua, and she was holding you completely in the air.
"Like ohmigawd, Taco!" she said inbetween slurps of your tiny dog dick. "Good thing I can, like, hold you. This would totally suck trying to do this on the floor!" your girlfriend said as she went back to the blowjob.
The idea was to be a bimbo and her purse dog. Despite being an animal, the shapeshifting ability to be a Chihuahua in more ways than one still applied so it was easy to be one, including being an excited yippy dog who seemed somewhat confused at what his master was doing to him. Still, you didn't stay on complete auto pilot and "humped" your girlfriend's mouth the best you could instead of letting her do all the work. So you had your orgasm and she set you aside on your bed while you recovered.
"Like, wow! Doggy spunk tastes different. Still tasty tho! How about you help your Mommy Jessica with some 'fun'too?" Remarked "Jessica", your "owner." She laid back comfortably into the bed point her vagina towards you, waiting patiently. You yipped back as a response. Your girlfriend tried to experiment with giving you both telepathy, but it was clear it was beyond her. Still, enough time and getting use to body language (especially just acting human at times) helped with the language barrier.
You soon recovered, getting back up on all fours and making the small "journey" to between her legs. It wasn't just being a dog that was neat, but such a tiny size had its own novelty. Doing your best to get into position, which was basically standing on the bed and resting your forelegs just above her vagina, you went to more humping.
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"You wan summore chikin, baby?" you asked your girlfriend. You were currently a 40 something obese black woman named Shaniqua and your girlfriend was currently her son, Kareem, a muscled black man. You were both naked currently as your girlfriend couldn't do clothes and many wouldn't fit the bodies you were trying out, so this was becoming an issue in many ways. Still your girlfriend wanted to try out something after being inspired to have a nice meal.
"Fuck yeah, momma! You make da good sheet!" responded Kareem, currently wolfing down the fried chicken, and mashed potatos and gravey you made from what was in your kitchen and given skills. You sat down next to him and ate a plate you prepared for yourself.
Between bites, you two had fun discussing your current bodies being fully fictional people, but still having "lives" and backgrounds created conveniently. At least if you had a conversation with anyone. It didn't create IDs for you or actual identities in the world so you had to be careful if you went out. Soon you both finished, and you went to your own plan.
"Now let momma make a REAL man outta you!" You got up, had Kareem back up from the table a bit but stay in the chair. He was already hard in preparation and had a full-foot sized penis, a joke between you for black men. With your 400lbs body, you got into position to sit on top of Kareem's penis and lap, facing towards him, and had him slid right into you. Then the creaking happened.
Kareem was already a load of muscle by himself, but the kitchen chair was no match for that plus 400lbs and promptly broke. You were still on top of him and him inside of you, but he did get hurt in the process.
"You okay, baby?" you asked.
Kareem responded "Damn, momma! You needs tah lose sum weight!" still showing a grimace but maintaining a thrusting motion queueing he was still up for the sex.
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"Oh we need to do this. Oh and move that over there" ordered your girlfriend, who was currently your mom.
"Oui, madame." You responded, currently as a dutiful french maid... if still naked. It was obvious your fun around the house with changes that would lead to questions when your family came back, so your girlfriend was switching between being both your dad and mom for knowing how to fix something, and your french maid form hit two birds with one stone with trying something kinky and useful. Your girlfriend was micromanaging you like crazy and your form made it easy to find it fulfilling.
"We still need to fix that chair" you suddenly heard a male voice behind you, and grabbing you by the hips. You looked back and saw your dad. "But how about we have 'break', Monique? The Mrs won't have to know."
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"Ah, ah! You so big. So BIG! Rin-rin rike big!" you said between being thrusted behind over a sink. You were currently worn-looking, 30 something asian woman with a bad boob job and under 5 feet, while your girlfriend was currently a greasy looking, overweight, balding middle-aged man. And his penis was below average size.
To anyone on the outside, it would be an unattractive moment with greasy man having sex with an asian whore putting on a show on purpose, but on the inside, both were so turned on it didn't matter. It was another scenario to play out. That and your girlfriend tweaked it besides mental changes, you had sensitivities and sex drives ramped up so it would be enjoyable no matter what.
Soon he exploded into you and you had your orgasm as well. His was very undignified while you had a very whorish moan. Soon he pulled out, and grabbed 2 dollars to give to you for your obvious service.
"Oughta been enough. Uh...'Rin-rin'?" he smiled sleezily.
"It 'Rin-Rin'!" you responded with slight offense, playing stupid at not know your own heavy accent. "It three dawra! Not two! You no cheat Rin-rin!" also playing the part of being a concerned working girl.
"Okay, okay, sheesh!" He grabbed a $5 dollar bill from another part of the bathroom instead, "How about this and a happy ending?"
You gave it a few seconds. "Ok! You no cheat Rin-Rin again, ok? Ok!"
It was amazing what scenarios you two could pull off and still feel so real.
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"Damn, we need to get some food. All we have is cereal. Not even milk." you called back to your girlfriend while in the kitchen for the morning. You could use the Shapeshifting to make yourselves not hungry, but both of you were iffy on using it all the time to solve everything, even if you were pretty close to okay with it. You had enough money from your parents to buy food, but you were feeling lazy this morning.
Your girlfriend had same feelings. "Wait, I got an idea! Follow my lead."
Soon in place of your girlfriend was a white chicken with red waddles, clucking and moving in sharp movements like a chicken would. She flew up onto the counter and climbed into a bowl. At this point you knew exactly what she was going for.
She went into a sort of squat, and after some time, she laid a typical egg for eating and did loud squawks as she did. Then she repeated the squat... Soon there were 4 eggs in the bowl, and your chicken girlfriend gave what you guessed was a display of pride and hoping you got she was hinting at.
Soon she changed back, and gave a wink. "Wait, not done yet!" She grabbed a bucket from the garage, found open space in the kitchen and set the bucket down. The shapeshifting process started, and soon was a very large, black and white milk cow in front of you. And if it wasn't clear, it positioned itself and its huge udders over the bucket, and making motions with its head towards it. She wanted to milk it, and so you got on your knees and did.
You had no idea how to milk a cow, but you soon figured it out and icy cold milk came out. Your girlfriend shivered and moo'd during the actions, and you took some opportunity to manhandle the udders and even drink from them. With a motion she made, you figured she was saying "wrap it up" and so you did, a full bucket of milk with a little bit of mess from the inexperience. She transformed back and gave an explanation.
"I saw some videos on chickens and cows. Chickens don't lay that many eggs at once so I messed with my body a little. Cow milk comes out warm as well, so I changed it that it came out cold so we can use it asap." She clarified. "Oh and it was kinky of course!"
And so some eggs were fried and cereal with milk was most certain mixed together.
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And so time went on...