"Let me do something interesting~" Jane wrote a couple of things on the app and saved the changes.
"What did you change sis?" Amanda confusedly asked seeing that nothing happened.
"Just watch and feel!" Jane began to separate from their shared body until they completely split. When Jane separated from her sister her bodies looked the same, but they had two arms instead of four and only their respective head, but each one also had their human body parts, from the perspective of the body parts their minds were stored in Jane's body, while in Amanda's body she had mindless human body parts that still looked like them. There was another last difference, Amanda had Samantha while Jane had Tina, basically one kept the pussy and the other the cock.
"Oh wow sis, now I can look at your beautiful body better"
"Thanks, yours looks even better" they joked about having almost the same bodies.
"This is great but I also miss being fused with you"
"Don't worry Am, we can fuse back and split as much as we want" Jane decided to make a demonstration, hugging her sister from her back, quickly merging and relocating her arms above the ones of Amanda, and putting her head next to hers. "See?" She said after finishing the fusion. You could notice that in that state they were a herm again, having both Samantha and Tina in their shared crotch.
"Oh cool! Now I like this even more, how about testing this and have some fun~" Amanda replied.
"You're just reading my mind!" Jane and Amanda split again exactly like they did before. Amanda laid on the bed spreading her legs in front of her sister holding her hard and veiny human cock. "Ready to have your first assignment as a cock Tina?" Jane asked looking at her crotch.
"Of course! And can want to be inside you Samantha~" Tina answered.
"Then come here quickly, I'm getting hungry" Samantha opened her constantly drooling mouth, Jane inserted Tina inside her, everyone experiencing that felt like it was a sensation from another world. Samantha used her tongue to stimulate Tina inside her, for Jane it felt like her cock receiving a pleasurable massage while for Amanda felt like her pussy sucking the penis. They had a break after Tina came and comited cum through her mouth, Samantha kicked the semen and swallowed some of it
As the twin sisters had sex they decided to try a few more things, they played with each others anal tits fingering them, but also Jane inserted her cock inside one of Amanda's tits, feeling how Tina covered in milk while having the pleasure of fucking an asshole, despite being shoved inside a place filled with milk she didn't drown, not needing to breath as a cock.
"Oh God this feels soooooo good" Amanda moaned witnessing how her sister inserted a whole 8 inches human cock inside of her breasts. "*Moan* I would like to Hilda to experience this but her mind is in your body and you're the one with the cock"
"That can be fixed" Jane took out her cock of one of Amanda's nipples after cumming inside them too, laughing at how Tina looked bathed in milk. Amanda asked her how it would be possible and Jane told her the solution. "You see, I set that every time we are fused but want to separate we can decide what parts to keep, so when I wanted to split I decided to keep Tina and left you Samantha"
"Sounds great! Let me try it" the sisters fused again like they did before and divided again, now with Jane keeping Samantha while Amanda had Tina. "Oh Tina you feel so go down there~" said Amanda feeling and seeing her way too erected human cock. "Now Hilda, this is part of your punishment~" she said putting the tip of her cock in front of Hilda's butt hole nipple, Hilda squirmed trying to stand against that but couldn't do something more than farting milk, her mother penetrated her with all of Hilda.
Amanda grabbed Jane's shoulders to support herself while fucking Hilda, beginning to penetrate her even faster in her moment of total lust, if Hilda had a face that moment she would look like dying in pleasure while screaming moans. Amanda kept using her penis until she came filling her daughter's asshole with cum and milk.
Finally Amanda told her sister to pose in doggy style to do another thing, Jane did what her sister told her and spread her ass looking like Layla's face. "You deserve a punishment too~" Amanda said putting her human cock in front of Layla's nose.
"Yes mistress!! Please punish me and give me what I deserve!" Layla said opening her mouth, just for Amanda to quickly insert her cock, feeling like having anal sex in her insides. Layla would feel humiliated in her new position but her mind was configured to obey Jane and Amanda, enjoying sucking Tina and swallowing her cum when she came.
The horny and weird looking sisters decided to play for a while with their new possibilities, as they could decide which body parts to borrow when they separated they tried crazy things like Amanda having four ass-boobs and leaving Jane's chest completely flat, or Jane leaving Amanda as just a torso taking her arms and legs to use her as a fleshlight, for some examples.
After all the fun, they fused back again. "Oh my~" Amanda let out little moan, "I'll never get tired of this and discovering new things with you sis!"
"Me too, I can't wait to imagine what other kinky and freaky things we can do~"
"I hope you're learning your lesson dear~" Amanda fingered Hilda, still leaking bits of their cum mixed with the milk that was her father, she squirming wanting for her punishment to end. "There's still six months left of that!" The sisters laughed, thinking on what they could do next.